The application of the method of molecular dynamics based on the use of pair interatomic potentials has been discussed to study various deformation processes during structural and phase (martensitic) transformations in metallic single and polycrystals. It has been shown that the method of molecular dynamics in a two-dimensional model makes it possible to qualitatively analyze the processes of grain-boundary sliding and other mechanisms of plastic deformation in polycrystals. It is also an efficient tool for describing diffusionless martensitic transformations in metallic materials. As an example, the use of the method for simulating grain-boundary sliding in a polycrystal with nonequilibrium grain boundaries is presented and the mechanisms of overcoming an obstruction in the form of a protruding segment of a grain have been demonstrated at the atomic level. The application of this method for describing the dynamics and morphology of the thermoelastic martensitic transformation has been illustrated by the example of the titanium nickelide and manganese alloys.
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Original Russian Text © Yu.A. Baimova, S.V. Dmitriev, N.N. Kuranova, R.R. Mulyukov, A.V. Pushin, V.G. Pushin, 2018, published in Fizika Metallov i Metallovedenie, 2018, Vol. 119, No. 6, pp. 626–635.
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Baimova, Y.A., Dmitriev, S.V., Kuranova, N.N. et al. Molecular Dynamics Study of the Deformation Processes of Metallic Materials in Structural and Phase (Martensitic) Transformations. Phys. Metals Metallogr. 119, 589–597 (2018). https://doi.org/10.1134/S0031918X18060042
- molecular dynamics
- mechanisms of plastic deformation
- martensitic transformation