Indentation pop-in behavior of CoCrFeNiAl0.3 high-entropy alloy

被引：3

作者：

Meng, Lu ^{[1
,2
]}

Qiu, Ji ^{[1
,2
]}

Wang, Zhihua ^{[1
,2
]}

Liu, Erqiang ^{[3
]}

Shu, Xuefeng ^{[1
,2
]}

Xiao, Gesheng ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, Coll Mech & Vehicle Engn, Inst Appl Mech, Taiyuan 030024, Peoples R China

[2] Shanxi Key Lab Mat Strength & Struct Impact Taiyu, Taiyuan 030024, Peoples R China

[3] Taiyuan Univ Sci & Technol, Coll Appl Sci, Taiyuan 030024, Peoples R China

来源：

MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 12期

基金：

中国国家自然科学基金;

关键词：

high entropy alloy; nanoindentation; pop-in; loading rate; rheological model; DISLOCATION NUCLEATION; CREEP CHARACTERISTICS; INCIPIENT PLASTICITY; SERRATED FLOW; NANOINDENTATION; TEMPERATURE; DEFORMATION; ROOM;

D O I：

10.1088/2053-1591/ab6115

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pop-in behavior of face-centered cubic (FCC) CoCrFeNiAl0.3 high-entropy alloy (HEA) under different loading rates was investigated by nanoindentation with spherical indenter. Experimental results show the distinct three-stage feature of the first pop-in, namely the elastic stage before pop-in, linear plastic stage and deceleration plastic stage for the pop-in evolution. Rate effect was analysed and critical shear stress required for the first pop-in event is obtained. A rheological model was proposed to characterize the pop-in behavior of CoCrFeNiAl0.3 HEA under different loading rates, and the related model parameters are given.

引用

页数：7

共 35 条

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[Anonymous], 1987, CONTACT MECH

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