期刊
METALS AND MATERIALS INTERNATIONAL
卷 9, 期 3, 页码 221-226出版社
KOREAN INST METALS MATERIALS
DOI: 10.1007/BF03027039
关键词
cubic to tetragonal; martensitic transformation; phase-field model; thin film
A 3-dimensional phase-field model is developed to describe the cubic to tetragonal martensitic phase transformation in a thin film attached to a substrate. Elasticity solutions are derived for both elastically anisotropic and isotropic thin films with arbitrary domain structures, subject to the mixed boundary conditions for stress-free and constrained states. The model is applied to an Fe-31%Ni alloy system. The nucleation process as well as the final domain structure strongly depends on the substrate constraint. At a smaller undercooling, the increased strain energy effect results in a lower volume fraction of martensite, a finer domain structure and a longer nucleation period.
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