| Record |
| Author |
Tanner, L.E.; Shapiro, S.M.; Krumhansl, J.A; Schryvers, D.; Noda, Y.; Yamada, Y.; Barsch, G.R.; Gooding, R.; Moss, S.C. |
| Title |
Firsto order phase transformation in the Ni-Al system |
Type |
A3 Journal Article |
| Year |
1992 |
Publication |
Metallurgy and Ceramics |
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| Keywords |
A3 Journal Article; Electron Microscopy for Materials Science (EMAT) ; |
| Abstract |
First-order displacive phase transformations in alloys and compounds are of high technological importance. We have studied this class of phase transformation in the high-temperature-stable Ni-Al f32(B2) phase as a function of composition, temperature, and stress using transmission electron microscopy and neutron scattering. The results show in detail the direct relationship between the unusually low energies of the transformation-related phonon modes and the development of pre-transformation microstructures (strain-embryos, etc.) via anharmonic coupling processes that ultimately lead to the nucleation and growth of the low-temperature martensitic phases. With these results, it is now possible to develop effective models for nonclassical heterogeneous nucleation of martensite transformations in bulk materials. This tills a critical gap and sets the stage for us to proceed in developing a more global understanding of condensed matter transformations including the coupling of displacive with replacive mechanisms. |
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Wos |
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0000-00-00 |
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Open Access |
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no |
| Call Number |
EMAT @ emat @ |
Serial |
5053 |
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