TY - JOUR
T1 - Molecular dynamics simulation of plasticity in VN(001) crystals under nanoindentation with a spherical indenter
AU - Fu, Tao
AU - Peng, Xianghe
AU - Wan, Chen
AU - Lin, Zijun
AU - Chen, Xiaosheng
AU - Hu, Ning
AU - Wang, Zhongchang
PY - 2017/1/15
Y1 - 2017/1/15
N2 - We perform molecular dynamics simulations of the nanoindentation on VN (001) films with a spherical indenter to elucidate the initial plastic deformation and the formation mechanisms of dislocation loops during nanoindentation. We find that the nucleation and movement of partial dislocations are the main mechanism of the inelastic deformation at the initial plastic stage of nanoindentation, when the “dislocation flower” consisting of several {111} stacking fault planes and the 〈110〉 stair rod dislocation lines are observed. With the increase in indentation depth, the newly nucleated dislocations react with the existing ones, forming four kinds of dislocation loops. Moreover, we also conduct a systematic analysis of the formation process of the dislocation flower and the four kinds of dislocation loops.
AB - We perform molecular dynamics simulations of the nanoindentation on VN (001) films with a spherical indenter to elucidate the initial plastic deformation and the formation mechanisms of dislocation loops during nanoindentation. We find that the nucleation and movement of partial dislocations are the main mechanism of the inelastic deformation at the initial plastic stage of nanoindentation, when the “dislocation flower” consisting of several {111} stacking fault planes and the 〈110〉 stair rod dislocation lines are observed. With the increase in indentation depth, the newly nucleated dislocations react with the existing ones, forming four kinds of dislocation loops. Moreover, we also conduct a systematic analysis of the formation process of the dislocation flower and the four kinds of dislocation loops.
KW - Dislocation flower
KW - Dislocation loops
KW - Molecular dynamics simulation
KW - Nanoindentation
KW - VN
UR - http://www.scopus.com/inward/record.url?scp=84989298188&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84989298188&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2016.09.130
DO - 10.1016/j.apsusc.2016.09.130
M3 - Article
AN - SCOPUS:84989298188
VL - 392
SP - 942
EP - 949
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -