Fatigue characteristics of Mg Alloy AZ21 under multiaxial non-proportional loading

被引：0

作者：

Cui Y. ^{[1
,2
]}

Chen G. ^{[1
]}

Wang L. ^{[1
]}

Gao H. ^{[1
]}

Chen X. ^{[1
]}

机构：

[1] School of Chemical Engineering and Technology, Tianjin University, Tianjin

[2] Renai College of Tianjin University, Tianjin

来源：

Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2017年 / 50卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Fatigue life prediction; Low-cycle fatigue; Mg alloy; Multiaxial fatigue; Non-proportional loading;

D O I：

10.11784/tdxbz201512051

中图分类号：

学科分类号：

摘要：

Widely used for engineering structural components, Mg alloys are normally subjected to complicated multiaxial loads, and generally suffer multiaxial fatigue failure.In this study, the cyclic mechanical properties of the Mg alloy AZ21 were investigated under uniaxial, torsional and multiaxial loading paths in air.The dominant defor-mation mechanisms were revealed under different loading paths.The fatigue testing results showed that with the same equivalent stress amplitude, the fatigue lives under multiaxial non-proportional loading paths were much shorter than those under uniaxial and torsional loading paths.Basquin equation was used to predict the fatigue life of the Mg alloy AZ21 under complex loading paths.By introducing a non-proportionality factor into Basquin equation, reasonable life predictions of the Mg alloy AZ21 were achieved for the circular and rhombic paths with the same loading amplitude. © 2017, Editorial Board of Journal of Tianjin University(Science and Technology). All right reserved.

引用

页码：283 / 289

页数：6

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