ON A POSSIBILITY ОF HOMOGENEOUS PORE ORIGINATIONA IN A GRAIN-BOUNDARY REGION UNDER THE IMPACT OF POST-CASCADE SHOCK WAVES
A.V. Markidonov, V.D. Starostenkov
VANT. Ser.: Mat. Mod. Fiz. Proc 2016. Вып.3. С. 37-46.
The molecular dynamics studies demonstrate that a directed flux of vacancies resulting in the origination of pores due to tensile stresses behind the shock wave front occurs under the impact of post-cascade shock waves. Pores originated at the grain-boundary dislocations and their further displacement under the impact of shock waves cause the growth of one grain owing to the absorption of the neighboring grain. The described phenomena are observed at temperatures, which are insufficiently high to start the diffusion process. Keywords: computer simulation, the molecular dynamics method, the embedded atom method, shock wave, defects, vacancy, pore, grain boundary, stair rod dislocation.
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