期刊论文

Xiao, Shifang

英文

APPLIED PHYSICS EXPRESS

1882-0778

2022

15

1

015503

10.35848/1882-0786/ac43e3

National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [NSFC 51871095, 51871094, 11802092, NSFC-NSAF U1830138]; Natural Science Foundation of Hunan ProvinceNatural Science Foundation of Hunan Province [2018JJ2036]; National Super-Computer Center in Changsha (NSCC)

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We have investigated the shock-induced plasticity and phase transition in the hexagonal columnar nanocrystalline Mg by large-scale nonequilibrium molecular dynamics simulations. The preexisting grain boundaries (GBs) induce the nucleation of the {10-12} twins for the local stress relaxation. The twins grow up in grains leading to the orientation rotation. The phase transition from the hexagonal close-packed phase to the body-centered cubic phase begins when the migrating twin GBs meet in A- A nd C-type grains, and continues in the plastic defor...