Dynamics of the Formation and Propagation of Nanobands with Elastic Lattice Distortion in Nickel Crystallites
- 2 Downloads
The formation and propagation of localized nanobands with elastic lattice distortion in nickel crystallites have been studied within the molecular dynamics framework. Such nanobands are formed due to the presence of regions with tensile and compressive stresses on the free surface. The nanoband propagation region is characterized by a collective vortex motion of atoms. The effect of different-type grain boundaries on nanoband propagation was investigated. It was shown that grain boundaries do not significantly affect the reorientation angle in the nanoband, but the nanoband propagation direction changes after crossing a grain boundary in accordance with the different crystallographic orientation of grains.
Keywordsmetals mechanical loading elastic lattice distortion nanobands collective vortex motion of atoms grain boundaries molecular dynamics
Unable to display preview. Download preview PDF.
- 3.Tyumentsev, A.N., Ditenberg, I.A., Pinzhin, Yu.P., Korotaev, A.D., and Valiev, R.Z., Microstructure and Mechanisms of Its Formation in Submicrocrystalline Copper Produced by Severe Plastic Deformation, Phys. Met. Metallogr., 2003, vol. 96, no. 4, pp. 378–387.Google Scholar
- 5.Panin, V.E., Elsukova, T.F., Vaulina, O.Yu., and Pochivalov, Yu.I., Nonlinear Wave Effects of Curvature Solitons in Surface Layers of High–Purity Aluminum Polycrystals under Severe Plastic Deformation. II. The Role of Boundary Conditions, Interfaces, and Nonequilibrium of a Deformed State, Phys. Mesomech., 2008, vol. 11, no. 5–6, pp. 299–307.Google Scholar
- 6.Elsukova, T.F., Panin, V.E., Panin, A.V., and Kuzina, O.Yu., Self–Consistency of Rotational Deformation Modes in Surface Layers of Polycrystals and Chessboard–Like Stress and Strain Distribution at Interfaces, Fiz. Mesomech., 2006, vol. 9, spec. iss., pp. 79–82.Google Scholar
- 13.Psakhie, S.G., Korostelev, S.Yu., Negreskul, S.I., Zolnikov, K.P., Wang, Z., and Li, S., Vortex–Like Mechanism of Grain Boundary Plastic Deformation. Computational Experiment, PZhTF, 1994, vol. 20, no. 1, pp. 36–39.Google Scholar