Stress-Relaxation Behavior of Magnesium-3Gadolinium-2Calcium-Based Alloys at Elevated Temperatures

被引：11

作者：

Mo, Ning ^{[1
]}

Tan, Qiyang ^{[1
]}

Jiang, Bin ^{[2
]}

Pan, Fusheng ^{[2
]}

Zhang, Ming-Xing ^{[1
]}

机构：

[1] Univ Queensland, Sch Mech & Min Engn, St Lucia, Qld 4072, Australia

[2] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400030, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2017年 / 48A卷 / 11期

关键词：

SOLUTION HEAT-TREATMENT; BINARY MG ALLOYS; TENSILE PROPERTIES; MAGNESIUM ALLOYS; CREEP RESISTANCE; GD ALLOYS; MICROSTRUCTURE; CAST; STRENGTH; SOLUTE;

D O I：

10.1007/s11661-017-4324-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Based on previously published work on binary Mg alloys by Abaspour et al. and on the magnesium (Mg)-6gadolinium (Gd)-2zinc (Zn)-0.6zirconium (Zr) (wt pct) alloy reported by Nie et al., a number of new lower-cost Mg-3Gd-2calcium (Ca) (wt pct)-based creep-resistant magnesium alloys were developed by replacing part of the Gd with Ca. After solution treatment at 793 K (520 degrees C), the Ca-containing alloys exhibited an increased strength and a reduced stress relaxation at 453 K (180 degrees C) compared with the Mg-6Gd-2Zn-0.6Zr (wt pct) alloy. This work indicates that the replacement of Gd with Ca is a promising approach to develop lower-cost Mg alloys with an improved creep resistance. The results support the hypothesis that the short-range order of solutes governs the creep behavior of magnesium alloys.

引用

页码：5710 / 5716

页数：7

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