TY - JOUR
T1 - Molecular dynamics simulation of effects of twin interfaces on Cu/Ni multilayers
AU - Fu, Tao
AU - Peng, Xianghe
AU - Weng, Shayuan
AU - Zhao, Yinbo
AU - Gao, Fengshan
AU - Deng, Lijun
AU - Wang, Zhongchang
N1 - Funding Information:
The authors acknowledge the financial support from National Natural Science Foundation of China (Grant no. 11332013 and 11272364 ), Scientific Research (B) (Grant no. 15H04114 ), Challenging Exploratory Research (Grant no. 15K14117 ), JSPS and CAS under Japan–China Scientific Cooperation Program, Shorai Foundation for Science and Technology , and the Chongqing Research Program of Basic Research and Frontier Technology (Grant no. cstc2015jcyjA50008 ).
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/3/21
Y1 - 2016/3/21
N2 - We perform molecular dynamics simulation of the indentation on pure Cu and Ni films and Cu/Ni multilayered films with a cylindrical indenter, aimed to investigate the effects of the cubic-on-cubic interface and hetero-twin interface on their mechanical properties. We also investigate systematically the formation of twin boundary in the pure metals and the effects of the cubic-on-cubic and hetero-twin interface on mechanical properties of the multilayers. We find that the slip of the horizontal stacking fault can release the internal stress, resulting in insignificant strengthening. The change in the crystal orientation by horizontal movement of the atoms in a layer-by-layer manner is found to initiate the movement of twin boundary, and the hetero-twin interface is beneficial to the hardening of multilayers. Moreover, we also find that increasing number of hetero-twin interfaces can harden the Cu/Ni multilayers.
AB - We perform molecular dynamics simulation of the indentation on pure Cu and Ni films and Cu/Ni multilayered films with a cylindrical indenter, aimed to investigate the effects of the cubic-on-cubic interface and hetero-twin interface on their mechanical properties. We also investigate systematically the formation of twin boundary in the pure metals and the effects of the cubic-on-cubic and hetero-twin interface on mechanical properties of the multilayers. We find that the slip of the horizontal stacking fault can release the internal stress, resulting in insignificant strengthening. The change in the crystal orientation by horizontal movement of the atoms in a layer-by-layer manner is found to initiate the movement of twin boundary, and the hetero-twin interface is beneficial to the hardening of multilayers. Moreover, we also find that increasing number of hetero-twin interfaces can harden the Cu/Ni multilayers.
KW - Cu/Ni multilayer
KW - Cubic-on-cubic interface
KW - Hetero-twin interface
KW - Molecular dynamics simulation
KW - Nanoindentation
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U2 - 10.1016/j.msea.2016.01.055
DO - 10.1016/j.msea.2016.01.055
M3 - Article
AN - SCOPUS:84957087200
VL - 658
SP - 1
EP - 7
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -