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Author | Ghidelli, M.; Orekhov, A.; Bassi, A.L.; Terraneo, G.; Djemia, P.; Abadias, G.; Nord, M.; Béché, A.; Gauquelin, N.; Verbeeck, J.; Raskin, J.-p.; Schryvers, D.; Pardoen, T.; Idrissi, H. | ||||
Title | Novel class of nanostructured metallic glass films with superior and tunable mechanical properties | Type | A1 Journal article | ||
Year | 2021 | Publication | Acta Materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
Issue | Pages | 116955 | ||
Keywords | A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) | ||||
Abstract | A novel class of nanostructured Zr50Cu50 (%at.) metallic glass films with superior and tunable mechanical properties is produced by pulsed laser deposition. The process can be controlled to synthetize a wide range of film microstructures including dense fully amorphous, amorphous embedded with nanocrystals and amorphous nano-granular. A unique dense self-assembled nano-laminated atomic arrangement characterized by alternating Cu-rich and Zr/O-rich nanolayers with different local chemical enrichment and amorphous or amorphous-crystalline composite nanostructure has been discovered, while significant in-plane clustering is reported for films synthetized at high deposition pressures. This unique nanoarchitecture is at the basis of superior mechanical properties including large hardness and elastic modulus up to 10 and 140 GPa, respectively and outstanding total elongation to failure (>9%), leading to excellent strength/ductility balance, which can be tuned by playing with the film architecture. These results pave the way to the synthesis of novel class of engineered nanostructured metallic glass films with high structural performances attractive for a number of applications in microelectronics and coating industry. |
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000670077800004 | Publication Date | 2021-05-12 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 27 | Open Access | OpenAccess |
Notes | H.I. is mandated by the Belgian National Fund for Scientific Research (FSR-FNRS). This work was supported by the Fonds de la Recherche Scientifique – FNRS under Grant T.0178.19 and Grant CDR– J011320F. We acknowledge funding for the direct electron detector used in the 4D stem studies from the Hercules fund 'Direct electron detector for soft matter TEM' from the Flemish Government J.V acknowledges funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 823717 – ESTEEM3. A.O. has received partial funding from the GOA project “Solarpaint” of the University of Antwerp. A.B. and J.V. acknowledge funding through FWO project G093417N ('Compressed sensing enabling low dose imaging in transmission electron microscopy') from the Flanders Research Fund. M.G. and A.L.B acknowledge Chantelle Ekanem for support in PLD depositions. | Approved | Most recent IF: 5.301 | ||
Call Number | EMAT @ emat @c:irua:178142 | Serial | 6761 | ||
Permanent link to this record | |||||
Author | Tian, H.; Schryvers, D.; Liu, D.; Jiang, Q.; van Humbeeck, J. | ||||
Title | Stability of Ni in nitinol oxide surfaces | Type | A1 Journal article | ||
Year | 2011 | Publication | Acta biomaterialia | Abbreviated Journal | Acta Biomater |
Volume ![]() |
7 | Issue | 2 | Pages | 892-899 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | The stability of Ni in titanium oxide surface layers on nitinol wires known to release certain amounts of Ni was investigated by first principles density functional theory and transmission electron microscopy. The oxides were identified as a combination of TiO and TiO2 depending on the thickness of the layer. The calculations indicate that free Ni atoms can exist in TiO at ambient temperature while Ni particles form in TiO2, which was confirmed by the transmission electron microscopy observations. The results are discussed with respect to surface stability and Ni release due to free Ni atoms and Ni particles. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | S.l. | Editor | ||
Language | Wos | 000286707700047 | Publication Date | 2010-09-17 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1742-7061; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 6.319 | Times cited | 39 | Open Access | |
Notes | Fwo | Approved | Most recent IF: 6.319; 2011 IF: 4.865 | ||
Call Number | UA @ lucian @ c:irua:85998 | Serial | 3128 | ||
Permanent link to this record | |||||
Author | Marteleur, M.; Idrissi, H.; Amin-Ahmadi, B.; Prima, F.; Schryvers, D.; Jacques, P.J. | ||||
Title | On the nucleation mechanism of {112} < 111 > mechanical twins in as-quenched beta metastable Ti-12 wt.% Mo alloy | Type | A1 Journal article | ||
Year | 2019 | Publication | Materialia | Abbreviated Journal | |
Volume ![]() |
7 | Issue | Pages | Unsp 100418 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Recently developed beta-metastable Ti grades take advantage of the simultaneous activation of TRIP and TWIP effects for enhancing their work hardening rate. However, the role of each plasticity mechanism on the macroscopic mechanical response is still unclear. In this work, the nucleation mechanism of the first activated plasticity mechanism, namely {112} < 111 > twinning, was investigated. Firstly, post-mortem TEM analysis showed that twins nucleate on pre-existing microstructural defects such as thermal jogs with the zonal dislocation mechanism. The precipitation of the omega phase on twin boundaries has been observed, as well as the emission of numerous dislocations from super-jogs present in these twin boundaries. It is also shown that {112} < 111 > twins act as effective dislocation sources for the subsequent plasticity mechanisms such as beta -> alpha '' martensitic transformation and {332} < 111 > twinning. Secondly, in situ TEM tensile testing of the investigated Ti grade highlighted the primary role of the initial defect configuration present in the microstructure. It is shown that twins cannot nucleate without the presence of specific defects allowing the triggering of the dislocation decomposition needed for the twinning mechanism highlighted in investigated bulk samples. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000537131000052 | Publication Date | 2019-07-31 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 2589-1529 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | Times cited | Open Access | |||
Notes | Approved | no | |||
Call Number | UA @ admin @ c:irua:170326 | Serial | 6875 | ||
Permanent link to this record | |||||
Author | Zhang, F.; Vanmeensel, K.; Batuk, M.; Hadermann, J.; Inokoshi, M.; Van Meerbeek, B.; Naert, I.; Vleugels, J. | ||||
Title | Highly-translucent, strong and aging-resistant 3Y-TZP ceramics for dental restoration by grain boundary segregation | Type | A1 Journal article | ||
Year | 2015 | Publication | Acta biomaterialia | Abbreviated Journal | Acta Biomater |
Volume ![]() |
16 | Issue | 16 | Pages | 215-222 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Latest trends in dental restorative ceramics involve the development of full-contour 3Y-TZP ceramics which can avoid chipping of veneering porcelains. Among the challenges are the low translucency and the hydrothermal stability of 3Y-TZP ceramics. In this work, different trivalent oxides (Al2O3, Sc2O3, Nd2O3 and La2O3) were selected to dope 3Y-TZP ceramics. Results show that dopant segregation was a key factor to design hydrothermally stable and high-translucent 3Y-TZP ceramics and the cation dopant radius could be used as a controlling parameter. A large trivalent dopant, oversized as compared to Zr4+, exhibiting strong segregation at the ZrO2 grain boundary was preferred. The introduction of 0.2 mol% La2O3 in conventional 0.10.25 wt.% Al2O3-doped 3Y-TZP resulted in an excellent combination of high translucency and superior hydrothermal stability, while retaining excellent mechanical properties. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | S.l. | Editor | ||
Language | Wos | 000351978600021 | Publication Date | 2015-02-04 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1742-7061; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 6.319 | Times cited | 54 | Open Access | |
Notes | Fwo G043110n | Approved | Most recent IF: 6.319; 2015 IF: 6.025 | ||
Call Number | c:irua:124421 | Serial | 1473 | ||
Permanent link to this record | |||||
Author | Lezaack, M.B.; Hannard, F.; Zhao, L.; Orekhov, A.; Adrien, J.; Miettinen, A.; Idrissi, H.; Simar, A. | ||||
Title | Towards ductilization of high strength 7XXX aluminium alloys via microstructural modifications obtained by friction stir processing and heat treatments | Type | A1 Journal article | ||
Year | 2021 | Publication | Materialia | Abbreviated Journal | |
Volume ![]() |
20 | Issue | Pages | 101248 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | High strength 7XXX aluminium series reach exceptional strength, higher than all other industrial aluminium alloys. However, they suffer from a lack of ductility compared to softer series. This work presents a procedure to improve the ductility of 7475 Al alloy in high strength condition, reaching a true fracture strain of 70% at full 500 MPa T6 yield strength. Using friction stir processing (FSP) and post-FSP heat treatments, 100% of industrial rolled material T6 yield stress is maintained but a 180% increase in fracture strain is measured for the processed material. This ductility improvement is studied by in-situ synchrotron X-ray tomography and is explained by the reduction of intermetallic particles size and the homogenization of their spatial distribution. Furthermore, the microstructure after FSP shows equiaxed refined grains which favour crack deviation as opposed to large cracks parallel to the elongated coarse grains in rolled plate. These results are paving the way to better formability and crashworthiness of 7XXX alloys. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000718127100006 | Publication Date | 2021-10-19 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 2589-1529 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | Times cited | Open Access | Not_Open_Access | ||
Notes | Approved | Most recent IF: NA | |||
Call Number | UA @ admin @ c:irua:184145 | Serial | 6894 | ||
Permanent link to this record | |||||
Author | Schryvers, D.; Lahjouji, D.E.; Slootmaekers, B.; Potapov, P.L. | ||||
Title | HREM investigation of martensite precursor effects and stacking sequences in Ni-Mn-Ti alloys | Type | A1 Journal article | ||
Year | 1996 | Publication | Scripta metallurgica et materialia | Abbreviated Journal | Scripta Mater |
Volume ![]() |
35 | Issue | Pages | 1235-1241 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | New York | Editor | ||
Language | Wos | A1996VL92800019 | Publication Date | 2002-07-26 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6462; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.224 | Times cited | 2 | Open Access | |
Notes | Approved | no | |||
Call Number | UA @ lucian @ c:irua:15427 | Serial | 1506 | ||
Permanent link to this record | |||||
Author | Schryvers, D.; Firstov, G.S.; Seo, J.W.; van Humbeeck, J.; Koval, Y.N. | ||||
Title | Unit cell determination in CuZr martensite by EM and X-ray diffraction | Type | A1 Journal article | ||
Year | 1997 | Publication | Scripta materialia | Abbreviated Journal | Scripta Mater |
Volume ![]() |
36 | Issue | Pages | 1119-1125 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | A1997WV99600007 | Publication Date | 0000-00-00 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6462 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.747 | Times cited | 76 | Open Access | |
Notes | Approved | Most recent IF: 3.747; 1997 IF: 0.645 | |||
Call Number | UA @ lucian @ c:irua:21344 | Serial | 3811 | ||
Permanent link to this record | |||||
Author | Muto, S.; Schryvers, D.; Merk, N.; Tanner, L.E. | ||||
Title | HREM and ED study of the displacive transformation of the Ni2Al phase in a Ni65Al35 alloy and associated with the martensitic transformation | Type | A1 Journal article | ||
Year | 1993 | Publication | Acta metallurgica et materialia | Abbreviated Journal | |
Volume ![]() |
41 | Issue | Pages | 2377-2383 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | New York | Editor | ||
Language | Wos | A1993LN82900011 | Publication Date | 0000-00-00 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0956-7151 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | Times cited | 31 | Open Access | ||
Notes | Approved | no | |||
Call Number | UA @ lucian @ c:irua:6778 | Serial | 1497 | ||
Permanent link to this record | |||||
Author | Schryvers, D.; Ma, Y.; Toth, L.; Tanner, L.E. | ||||
Title | Electron microscopy study of the formation of Ni5Al3 in a Ni62.5Al37.5 B2 alloy: 1: precipitation and growth | Type | A1 Journal article | ||
Year | 1995 | Publication | Acta metallurgica et materialia | Abbreviated Journal | |
Volume ![]() |
43 | Issue | 11 | Pages | 4045-4056 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | New York | Editor | ||
Language | Wos | A1995TA33200014 | Publication Date | 2003-12-05 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0956-7151; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | Times cited | 27 | Open Access | ||
Notes | Approved | no | |||
Call Number | UA @ lucian @ c:irua:13164 | Serial | 973 | ||
Permanent link to this record | |||||
Author | Schryvers, D.; Ma, Y.; Toth, L.; Tanner, L.E. | ||||
Title | Electron microscopy study of the formation of Ni5Al3 in a Ni62.5Al37.5 B2 alloy: 2: plate crystallography | Type | A1 Journal article | ||
Year | 1995 | Publication | Acta metallurgica et materialia | Abbreviated Journal | |
Volume ![]() |
43 | Issue | 11 | Pages | 4057-4065 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | New York | Editor | ||
Language | Wos | A1995TA33200015 | Publication Date | 2003-12-05 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0956-7151; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | Times cited | 11 | Open Access | ||
Notes | Approved | no | |||
Call Number | UA @ lucian @ c:irua:13165 | Serial | 974 | ||
Permanent link to this record | |||||
Author | Potapov, P.; Shelyakov, A.; Schryvers, D. | ||||
Title | On the crystal structure of TiNi-Cu martensite | Type | A1 Journal article | ||
Year | 2001 | Publication | Scripta materialia | Abbreviated Journal | Scripta Mater |
Volume ![]() |
44 | Issue | Pages | 1-7 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000166808100001 | Publication Date | 2002-07-25 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6462; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.747 | Times cited | 36 | Open Access | |
Notes | Approved | Most recent IF: 3.747; 2001 IF: 1.130 | |||
Call Number | UA @ lucian @ c:irua:48378 | Serial | 2433 | ||
Permanent link to this record | |||||
Author | Seo, J.W.; Schryvers, D. | ||||
Title | TEM investigation of the microstructure and defects of CuZr martensite: 1: morphology and twin systems | Type | A1 Journal article | ||
Year | 1998 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
46 | Issue | Pages | 1165-1175 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000072289100009 | Publication Date | 2002-07-25 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 46 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 1998 IF: 1.834 | |||
Call Number | UA @ lucian @ c:irua:48360 | Serial | 3479 | ||
Permanent link to this record | |||||
Author | Seo, J.W.; Schryvers, D. | ||||
Title | TEM investigation of the microstructure and defects of CuZr martensite: 2: planar defects | Type | A1 Journal article | ||
Year | 1998 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
46 | Issue | Pages | 1177-1183 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000072289100010 | Publication Date | 2002-07-25 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 21 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 1998 IF: 1.834 | |||
Call Number | UA @ lucian @ c:irua:48361 | Serial | 3480 | ||
Permanent link to this record | |||||
Author | Potapov, P.L.; Ochin, P.; Pons, J.; Schryvers, D. | ||||
Title | Nanoscale inhomogeneities in melt-spun Ni-Al | Type | A1 Journal article | ||
Year | 2000 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
48 | Issue | Pages | 3833-3845 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000089632800003 | Publication Date | 2002-07-25 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 28 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 2000 IF: 2.166 | |||
Call Number | UA @ lucian @ c:irua:48362 | Serial | 2265 | ||
Permanent link to this record | |||||
Author | Berg, L.K.; Gjønnes, J.; Hansen, V.; Li, X.Z.; Knutson-Wedel, M.; Waterloo, G.; Schryvers, D.; Wallenberg, L.R. | ||||
Title | GP-zones in Al-Zn-Mg alloys and their role in artificial aging | Type | A1 Journal article | ||
Year | 2001 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
49 | Issue | Pages | 3443-3451 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000171445700006 | Publication Date | 2002-07-25 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 261 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 2001 IF: 2.658 | |||
Call Number | UA @ lucian @ c:irua:48363 | Serial | 1361 | ||
Permanent link to this record | |||||
Author | Santamarta, R.; Schryvers, D. | ||||
Title | Effect of amorphous-crystalline interfaces on the martensitic transformation in Ti50Ni25Cu25 | Type | A1 Journal article | ||
Year | 2004 | Publication | Scripta materialia | Abbreviated Journal | Scripta Mater |
Volume ![]() |
50 | Issue | Pages | 1423-1427 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000221009500002 | Publication Date | 2004-04-13 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6462; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.747 | Times cited | 29 | Open Access | |
Notes | Approved | Most recent IF: 3.747; 2004 IF: 2.112 | |||
Call Number | UA @ lucian @ c:irua:48379 | Serial | 795 | ||
Permanent link to this record | |||||
Author | Boullay, P.; Schryvers, D.; Ball, J.M. | ||||
Title | Nano-structures at martensite macrotwin interfaces in Ni65Al35 | Type | A1 Journal article | ||
Year | 2003 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
51 | Issue | 5 | Pages | 1421-1436 |
Keywords | A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) | ||||
Abstract | The atomic configurations at macrotwin interfaces between microtwinned martensite plates in Ni65Al35 material are investigated using transmission electron microscopy. The observed structures are interpreted in view of possible formation mechanisms for these interfaces. A distinction is made between cases in which the microtwins, originating from mutually perpendicular {110} austenite planes, enclose a final angle larger or smaller than 90degrees. Two different configurations, a crossing and a step type are described. Depending on the actual case, tapering, bending and tip splitting of the smaller microtwinvariants are observed. The most reproducible deformations occur in a region of approximately 5-10 nm width around the interface while a variety of structural defects are observed further away from the interface. These structures and deformations are interpreted in terms of the coalescence of two separately nucleated microtwinned martensite plates and the need to accommodate remaining stresses. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. | ||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000181677700018 | Publication Date | 2003-03-14 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 31 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 2003 IF: 3.059 | |||
Call Number | UA @ lucian @ c:irua:48364 | Serial | 2248 | ||
Permanent link to this record | |||||
Author | Yang, Z.; Tirry, W.; Schryvers, D. | ||||
Title | Analytical TEM investigations on concentration gradients surrounding Ni4Ti3 precipitates in Ni-Ti shape memory material | Type | A1 Journal article | ||
Year | 2005 | Publication | Scripta materialia | Abbreviated Journal | Scripta Mater |
Volume ![]() |
52 | Issue | 11 | Pages | 1129-1134 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000228190200010 | Publication Date | 2005-03-16 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6462; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.747 | Times cited | 49 | Open Access | |
Notes | GOA project; MCRTN-FP6-505226 Multimat | Approved | Most recent IF: 3.747; 2005 IF: 2.228 | ||
Call Number | UA @ lucian @ c:irua:55687 | Serial | 110 | ||
Permanent link to this record | |||||
Author | Tirry, W.; Schryvers, D. | ||||
Title | Quantitative determination of strain fields around Ni4Ti3 precipitates in NiTi | Type | A1 Journal article | ||
Year | 2005 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
53 | Issue | 4 | Pages | 1041-1049 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000226774500014 | Publication Date | 2004-12-14 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 97 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 2005 IF: 3.430 | |||
Call Number | UA @ lucian @ c:irua:55686 | Serial | 2750 | ||
Permanent link to this record | |||||
Author | Viart, N.; Sayed Hassan, R.; Ulhaq-Bouillet, C.; Meny, C.; Panissod, P.; Loison, J.L.; Versini, G.; Huber, F.; Pourroy, G.; Verbeeck, J.; Van Tendeloo, G. | ||||
Title | Oxidation processes at the metal/oxide interface in CoFe2/CoFe2O4 bilayers deposited by pulsed laser deposition | Type | A1 Journal article | ||
Year | 2006 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
54 | Issue | 1 | Pages | 191-196 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | CoFe2/CoFe2O4 bilayers were made by pulsed laser ablation of a CoFe2 target on Si(I 0 0) substrates. The metallic layer was deposited first, in vacuum. The oxide was then deposited in an oxidizing O-2:N-2 (20:80) atmosphere. Two different procedures were used for the introduction of the oxidizing atmosphere in the deposition chamber: the laser ablation of the target was either stopped (discontinuous deposition process) or maintained (continuous deposition process) during the 20 min necessary for the establishment of the desired O-2:N-2 pressure. In both cases, the different electronegativities of Fe and Co cause an important modification of the Fe/Co ratio at the metal/oxide interface, with a depletion of Fe in the metal region and of Co in the oxide region. In the continuous procedure, the combination of the kinetic energy given by the ablation process to the Fe and Co adatoms with the one they get from their different affinity towards oxidation allows the formation of a low roughness metal/oxide interface with a high (111) preferred orientation of the CoFe2O4 layer, an induced re-crystallisation of the metal layer underneath and an unusual antiferromagnetic metal/oxide magnetic coupling. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. | ||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000233784500021 | Publication Date | 2005-10-15 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 5 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 2006 IF: 3.549 | |||
Call Number | UA @ lucian @ c:irua:56043UA @ admin @ c:irua:56043 | Serial | 2540 | ||
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Author | Rotaru, G.-M.; Tirry, W.; Sittner, P.; van Humbeeck, J.; Schryvers, D. | ||||
Title | Microstructural study of equiatomic PtTi martensite and the discovery of a new long-period structure | Type | A1 Journal article | ||
Year | 2007 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
55 | Issue | 13 | Pages | 4447-4454 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000248436400021 | Publication Date | 2007-06-04 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 7 | Open Access | |
Notes | Fwo G.0465.05; Multimat | Approved | Most recent IF: 5.301; 2007 IF: 3.624 | ||
Call Number | UA @ lucian @ c:irua:65849 | Serial | 2047 | ||
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Author | Yang, Z.; Tirry, W.; Lamoen, D.; Kulkova, S.; Schryvers, D. | ||||
Title | Electron energy-loss spectroscopy and first-principles calculation studies on a Ni-Ti shape memory alloy | Type | A1 Journal article | ||
Year | 2008 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
56 | Issue | 3 | Pages | 395-404 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000253020900011 | Publication Date | 2007-12-01 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 20 | Open Access | |
Notes | Goa; Ec Rtn; Fwo | Approved | Most recent IF: 5.301; 2008 IF: 3.729 | ||
Call Number | UA @ lucian @ c:irua:67462 | Serial | 931 | ||
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Author | Bartova, B.; Wiese, N.; Schryvers, D.; Chapman, J.N.; Ignacova, S. | ||||
Title | Microstructure of precipitates and magnetic domain structure in an annealed Co38Ni33Al29 shape memory alloy | Type | A1 Journal article | ||
Year | 2008 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
56 | Issue | 16 | Pages | 4470-4476 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | The microstructure of a Co38Ni33Al29 ferromagnetic shape memory alloy was determined by conventional transmission electron microscopy (TEM), electron diffraction studies together with advanced microscopy techniques and in situ Lorentz microscopy. Rod-like precipitates, 1060 nm long, of hexagonal close-packed -Co were confirmed to be present by high-resolution TEM. The orientation relationship between the precipitates and B2 matrix is described by the Burgers orientation relationship. The crystal structure of the martensite obtained after cooling is tetragonal L10 with a (111) twinning plane. The magnetic domain structure was determined during an in situ cooling experiment using the Fresnel mode of Lorentz microscopy. While transformation proceeds from B2 austenite to L10 martensite, new domains are nucleated, leading to a decrease in domain width, with the magnetization lying predominantly along a single direction. It was possible to completely describe the relationship between magnetic domains and crystallographic directions in the austenite phase though complications existed for the martensite phase. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000259931300033 | Publication Date | 2008-06-11 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 23 | Open Access | |
Notes | Multimat | Approved | Most recent IF: 5.301; 2008 IF: 3.729 | ||
Call Number | UA @ lucian @ c:irua:72321 | Serial | 2072 | ||
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Author | Bartova, B.; Schryvers, D.; Yang, Z.; Ignacova, S.; Sittner, P. | ||||
Title | Microstructure and precipitates in as-cast Co38Ni33Al29 shape memory alloy | Type | A1 Journal article | ||
Year | 2007 | Publication | Scripta materialia | Abbreviated Journal | Scripta Mater |
Volume ![]() |
57 | Issue | 1 | Pages | 37-40 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | |||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000246632900010 | Publication Date | 2007-04-13 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6462; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.747 | Times cited | 22 | Open Access | |
Notes | Approved | Most recent IF: 3.747; 2007 IF: 2.481 | |||
Call Number | UA @ lucian @ c:irua:64753 | Serial | 2059 | ||
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Author | Delville, R.; Malard, B.; Pilch, J.; Schryvers, D. | ||||
Title | Microstructure changes during non-conventional heat treatment of thin NiTi wires by pulsed electric current studied by transmission electron microscopy | Type | A1 Journal article | ||
Year | 2010 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
58 | Issue | 13 | Pages | 4503-4515 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Transmission electron microscopy, electrical resistivity measurements and mechanical testing were employed to investigate the evolution of microstructure and functional superelastic properties of 0.1 mm diameter as-drawn NiTi wires subjected to a non-conventional heat treatment by controlled electric pulse currents. This method enables a better control of the recovery and recrystallization processes taking place during the heat treatment and accordingly a better control on the final microstructure. Using a stepwise approach of millisecond pulse annealing, it is shown how the microstructure evolves from a severely deformed state with no functional properties to an optimal nanograined microstructure (2050 nm) that is partially recovered through polygonization and partially recrystallized and that has the best functional properties. Such a microstructure is highly resistant against dislocation slip upon cycling, while microstructures annealed for longer times and showing mostly recrystallized grains were prone to dislocation slip, particularly as the grain size exceeds 200 nm. | ||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000279787100020 | Publication Date | 2010-06-02 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 110 | Open Access | |
Notes | Multimat; FWO IAA | Approved | Most recent IF: 5.301; 2010 IF: 3.791 | ||
Call Number | UA @ lucian @ c:irua:83279 | Serial | 2062 | ||
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Author | Idrissi, H.; Renard, K.; Ryelandt, L.; Schryvers, D.; Jacques, P.J. | ||||
Title | On the mechanism of twin formation in FeMnC TWIP steels | Type | A1 Journal article | ||
Year | 2010 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
58 | Issue | 7 | Pages | 2464-2476 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Although it is well known that FeMnC TWIP steels exhibit high work-hardening rates, the elementary twinning mechanisms controlling the plastic deformation of these steels have still not been characterized. The aim of the present study is to analyse the extended defects related to the twinning occurrence using transmission electron microscopy. Based on these observations, the very early stage of twin nucleation can be attributed to the pole mechanism with deviation proposed by Cohen and Weertman or to the model of Miura, Takamura and Narita, while the twin growth is controlled by the pole mechanism proposed by Venables. High densities of sessile Frank dislocations are observed within the twins at the early stage of deformation, which can affect the growth and the stability of the twins, but also the strength of these twins and their interactions with the gliding dislocations present in the matrix. This experimental evidence is discussed and compared to recent results in order to relate the defects analysis to the macroscopic behaviour of this category of material. | ||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000276523200018 | Publication Date | 2010-01-25 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 244 | Open Access | |
Notes | Iap | Approved | Most recent IF: 5.301; 2010 IF: 3.791 | ||
Call Number | UA @ lucian @ c:irua:82270 | Serial | 2441 | ||
Permanent link to this record | |||||
Author | Tirumalasetty, G.K.; van Huis, M.A.; Fang, C.M.; Xu, Q.; Tichelaar, F.D.; Hanlon, D.N.; Sietsma, J.; Zandbergen, H.W. | ||||
Title | Characterization of NbC and (Nb, Ti)N nanoprecipitates in TRIP assisted multiphase steels | Type | A1 Journal article | ||
Year | 2011 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
59 | Issue | 19 | Pages | 7406-7415 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Multiphase steels utilising composite strengthening may be further strengthened via grain refinement or precipitation by the addition of microalloying elements. In this study a Nb microalloyed steel comprising martensite, bainite and retained austenite has been studied. By means of transmission electron microscopy (TEM) we have investigated the size distribution and the structural properties of (Nb, Ti)N and NbC precipitates, their occurrence in the various steel phases, and their relationship with the Fe matrix. (Nb, Ti)N precipitates were found in ferrite, martensite, and bainite, while NbC precipitates were found only in ferrite. All NbC precipitates were found to be small (520 nm in size) and to have a face centred cubic (fcc) crystal structure with lattice parameter a = 4.36 ± 0.05 Å. In contrast, the (Nb, Ti)N precipitates were found to have a broader size range (5150 nm) and to have a fcc crystal structure with lattice parameter a = 8.09 ± 0.05 Å. While the NbC precipitates were found to be randomly oriented, the (Nb, Ti)N precipitates have a well-defined NishiyamaWasserman orientation relationship with the ferrite matrix. An analysis of the lattice mismatch suggests that the latter precipitates have a high potential for effective strengthening. Density functional theory calculations were performed for various stoichiometries of NbCx and NbxTiyNz phases and the comparison with experimental data indicates that both the carbides and nitrides are deficient in C and N content. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000296405200026 | Publication Date | 2011-09-29 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 58 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 2011 IF: 3.755 | |||
Call Number | UA @ lucian @ c:irua:93297 | Serial | 328 | ||
Permanent link to this record | |||||
Author | Malard, B.; Pilch, J.; Sittner, P.; Delville, R.; Curfs, C. | ||||
Title | In situ investigation of the fast microstructure evolution during electropulse treatment of cold drawn NiTi wires | Type | A1 Journal article | ||
Year | 2011 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
59 | Issue | 4 | Pages | 1542-1556 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Microstructural changes taking place during the heat treatment of cold-worked NiTi alloy are of key interest in shape memory alloy technology, since they are responsible for setting the austenite shape and functional properties of the heat-treated alloy. In this work, microstructural evolution during non-conventional electropulse heat treatment of thin NiTi filaments was investigated in a unique high-speed in situ synchrotron X-ray diffraction experiment with simultaneous evaluation of the tensile force and electrical resistivity of the treated wire. The in situ results provide direct experimental evidence on the evolution of the internal stress and density of defects during fast heating from 20 °C to ∼700 °C. This evidence is used to characterize a sequence of dynamic recovery and recrystallization processes responsible for the microstructure and superelastic functional property changes during the electropulse treatments. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000287265100023 | Publication Date | 2010-12-11 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 48 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 2011 IF: 3.755 | |||
Call Number | UA @ lucian @ c:irua:98372 | Serial | 1583 | ||
Permanent link to this record | |||||
Author | Cao, S.; Nishida, M.; Schryvers, D. | ||||
Title | Quantitative three-dimensional analysis of Ni4Ti3 precipitate morphology and distribution in polycrystalline Ni-Ti | Type | A1 Journal article | ||
Year | 2011 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
59 | Issue | 4 | Pages | 1780-1789 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | The three-dimensional size, morphology and distribution of Ni4Ti3 precipitates in a Ni50.8Ti49.2 polycrystalline shape memory alloy with a heterogeneous microstructure have been investigated using a focused ion beam/scanning electron microscopy slice-and-view procedure. The mean volume, central plane diameter, thickness, aspect ratio and sphericity of the precipitates in the grain interior as well as near to the grain boundary were measured and/or calculated. The morphology of the precipitates was quantified by determining the equivalent ellipsoids with the same moments of inertia and classified according to the Zingg scheme. Also, the pair distribution functions describing the three-dimensional distributions were obtained from the coordinates of the precipitate mass centres. Based on this new data it is suggested that the existence of the heterogeneous microstructure could be due to a very small concentration gradient in the grains of the homogenized material and that the resulting multistage martensitic transformation originates in strain effects related to the size of the precipitates and scale differences of the available B2 matrix in between the precipitates. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000287265100045 | Publication Date | 2010-12-20 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 34 | Open Access | |
Notes | Fwo | Approved | Most recent IF: 5.301; 2011 IF: 3.755 | ||
Call Number | UA @ lucian @ c:irua:85533 | Serial | 2766 | ||
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Author | Chen, X.; Cao, S.; Ikeda, T.; Srivastava, V.; Snyder, G.J.; Schryvers, D.; James, R.D. | ||||
Title | A weak compatibility condition for precipitation with application to the microstructure of PbTe-Sb2Te3 thermoelectrics | Type | A1 Journal article | ||
Year | 2011 | Publication | Acta materialia | Abbreviated Journal | Acta Mater |
Volume ![]() |
59 | Issue | 15 | Pages | 6124-6132 |
Keywords | A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) | ||||
Abstract | We propose a weak condition of compatibility between phases applicable to cases exhibiting full or partial coherence and Widmanstätten microstructure. The condition is applied to the study of Sb2Te3 precipitates in a PbTe matrix in a thermoelectric alloy. The weak condition of compatibility predicts elongated precipitates lying on a cone determined by a transformation stretch tensor. Comparison of this cone with the long directions of precipitates determined by a slice-and-view method of scanning electron microscopy combined with focused ion beam sectioning shows good agreement between theory and experiment. A further study of the morphology of precipitates by the Eshelby method suggests that interfacial energy also plays a role and gives an approximate value of interfacial energy per unit area of 250 dyn cm−1. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000294086900026 | Publication Date | 2011-07-22 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1359-6454; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 5.301 | Times cited | 8 | Open Access | |
Notes | Approved | Most recent IF: 5.301; 2011 IF: 3.755 | |||
Call Number | UA @ lucian @ c:irua:92388 | Serial | 3911 | ||
Permanent link to this record |