High cycle fatigue improvement by heat-treatment for semi-continuous casting Mg96.34Gd2.5Zn1Zr0.16 alloy

被引：25

作者：

He, Zongling

Peng, Liming

Pe, Penghuai ^{[1
]}

Wang, Yingxin

Hu, Xiaoyu

Ding, Wenjiang

机构：

[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 604卷

基金：

中国国家自然科学基金;

关键词：

Semi-continuous casting; Mg-Gd-Zn alloy; Heat-treatment; Fatigue properties; STACKING ORDERED STRUCTURE; MAGNESIUM ALLOY; ZR ALLOY; MECHANICAL-PROPERTIES; GD ALLOYS; ZN; BEHAVIOR; TEMPERATURE; MICROSTRUCTURE;

D O I：

10.1016/j.msea.2014.03.017

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High cycle fatigue behavior of casting Mg96.34Gd2.5Zn1Zr0.16 alloy was investigated for its improvement by heat-treatment. After solution treatment (T4, 10 h@773 K) or solution treatment plus artificial aging (T6, 10 h@773 K + 128 h@473 K), fatigue strength of this alloy was found to be enhanced. The T6-treated alloy achieved the highest fatigue strength, 130 MPa, being 25 MPa and 18 MPa greater than those of the as-cast and T4-treated alloy, respectively. The average fatigue life of the heat-treated alloys is longer than that of the as-cast alloy a given stress amplitude. For the distribution of fatigue life, a fatigue life gap spanned from 105 to 107 can be observed in the as-cast and T4-treated alloy. Such a gap is absent after the alloy received artificial aging. The mechanism for the high cycle fatigue behavior of the casting alloy after heat-treatment was also discussed. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：78 / 85

页数：8

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