MD simulation of nanoindentation on (001) and (111) surfaces of Ag-Ni multilayers

被引：46

作者：

Zhao, Yinbo ^{[1
]}

Peng, Xianghe ^{[1
,2
]}

fu, Tao ^{[1
]}

Sun, Rong ^{[3
]}

Feng, Chao ^{[1
]}

Wang, Zhongchang ^{[3
]}

机构：

[1] Chongqing Univ, Coll Aerosp Engn, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Chongqing Key Lab Heterogeneous Mat Mech, Chongqing 400044, Peoples R China

[3] Tohoku Univ, Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2015年 / 74卷

基金：

中国国家自然科学基金;

关键词：

MD simulation; Nanoindentation; Ag-Ni multilayers; Inverse Hall-Petch relationship; Modulation period; ATOMISTIC SIMULATIONS; MOLECULAR-DYNAMICS; AG/NI; BEHAVIOR; HARDNESS; DEFECTS;

D O I：

10.1016/j.physe.2015.08.020

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We perform MD simulations of the nanoinclentation 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. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：481 / 488

页数：8

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