Abstract
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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This article is based on a presentation made in the 2002 Korea-US symposium on the “Phase Transformations of Nano-Materials,” organized as a special program of the 2002 Annual Meeting of the Korean Institute of Metals and Materials, held at Yonsei University, Seoul, K orea on October 25–26, 2002.
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Seol, D.J., Hu, S.Y., Li, Y.L. et al. Cubic to tetragonal martensitic transformation in a thin film elastically constrained by a substrate. Met. Mater. Int. 9, 221–226 (2003). https://doi.org/10.1007/BF03027039
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DOI: https://doi.org/10.1007/BF03027039