TY - JOUR
T1 - MD simulation of nanoindentation on (001) and (111) surfaces of Ag-Ni multilayers
AU - Zhao, Yinbo
AU - Peng, Xianghe
AU - Fu, Tao
AU - Sun, Rong
AU - Feng, Chao
AU - Wang, Zhongchang
N1 - Funding Information:
The authors gratefully acknowledge financial supports from the National Natural Science Foundation of China (Grant nos. 11332013 and 11272364 ), the Chongqing Graduate Student Research Innovation Project (Grant no. CYB15029 ), the Scientific Research (B) (Grant no. 15H04114 ), the Challenging Exploratory Research (Grant no. 15K14117 ), the JSPS and CAS under Japan–China Scientific Cooperation Program , and Shorai Foundation for Science and Technology .
Publisher Copyright:
© 2015 Elsevier B.V.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/8/10
Y1 - 2015/8/10
N2 - Abstract We perform MD simulations of the nanoindentation on (001) and (111) surfaces of Ag-Ni multilayers with different modulation periods, and find that both the hardness and maximum force increase with the increase of modulation period, in agreement with the inverse Hall-Petch relation. A prismatic partial dislocation loop is observed in the Ni(111)/Ag(111) sample when the modulation period is relatively large. We also find that misfit dislocation network shows a square shape for the Ni(111)/Ag(111) interface, while a triangle shape for the Ni(001)/Ag(001) interface. The pyramidal defect zones are also observed in Ni(001)/Ag(001) sample, while the intersecting stacking faults are observed in Ni(111)/Ag(111) sample after dislocation traversing interface. The results offer insights into the nanoindentation behaviors in metallic multilayers, which should be important for clarifying strengthening mechanism in many other multilayers.
AB - Abstract We perform MD simulations of the nanoindentation on (001) and (111) surfaces of Ag-Ni multilayers with different modulation periods, and find that both the hardness and maximum force increase with the increase of modulation period, in agreement with the inverse Hall-Petch relation. A prismatic partial dislocation loop is observed in the Ni(111)/Ag(111) sample when the modulation period is relatively large. We also find that misfit dislocation network shows a square shape for the Ni(111)/Ag(111) interface, while a triangle shape for the Ni(001)/Ag(001) interface. The pyramidal defect zones are also observed in Ni(001)/Ag(001) sample, while the intersecting stacking faults are observed in Ni(111)/Ag(111) sample after dislocation traversing interface. The results offer insights into the nanoindentation behaviors in metallic multilayers, which should be important for clarifying strengthening mechanism in many other multilayers.
KW - Ag-Ni multilayers
KW - Inverse Hall-Petch relationship
KW - MD simulation
KW - Modulation period
KW - Nanoindentation
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U2 - 10.1016/j.physe.2015.08.020
DO - 10.1016/j.physe.2015.08.020
M3 - Article
AN - SCOPUS:84939480097
VL - 74
SP - 481
EP - 488
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
M1 - PHYSED1500575
ER -