Structural Phase Transformation in Ni-Hf and Ni-Ti Systems Studied by Molecular Dynamics Simulation(Cross-disciplinary Physics and Related Areas of Science and Technology)
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概要
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Applying proven realistic Ni-Hf and Ni-Ti potentials, molecular dynamics simulations are performed on the Ni-Hf and Ni-Ti solid solution models, respectively. Simulations reveal that the supersaturated Hf-based and Ti-based lattices upon dissolving about 18 and 7 at. % of Ni, respectively, would turn into a face-centered orthorhombic (fco) phase through an hcp-to-fco martensitic phase transformation. The invariant crystalline plane in the transformation is identified to be (011^^-0)_<hcp> and the orientation relationships are deduced to be (0001)_<hcp>‖(001)_<fco> and [1000]_<hcp>‖[11^^-0]_<fco>, respectively. It is proposed that the observed phase transformation is accomplished through four simultaneous actions, i.e., sliding, shearing, stretching and lattice constant readjusting. In addition, the correlations between the initial hcp and final fco structures as well as the lattice point correspondence are also deduced.
- 社団法人日本物理学会の論文
- 2005-10-15
著者
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Liu B.
Advanced Materials Laboratory Department Of Materials Science And Engineering Tsinghua University
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LI J.
Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University
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- Structural Phase Transformation in Ni-Hf and Ni-Ti Systems Studied by Molecular Dynamics Simulation(Cross-disciplinary Physics and Related Areas of Science and Technology)
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