High temperature mechanical behavior of low-pressure sand-cast Mg-Gd-Y-Zr magnesium alloy

Beiping Zhou; Guohua Wu; Liang Cao; Liang Zhang; Wencai Liu; Xiang Peng

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High temperature mechanical behavior of low-pressure sand-cast Mg-Gd-Y-Zr magnesium alloy

High temperature mechanical behavior of low-pressure sand-cast Mg-Gd-Y-Zr magnesium alloy

作者：

Beiping Zhou Guohua Wu Liang Cao Liang Zhang Wencai Liu Xiang Peng

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MG-GD-Y-ZR

Heat

treatment

High

temperature

tensile

property

Anomalous

temperature

dependence

摘要：

The aim of this work is firstly to optimize T6 heat-treatment of low-pressure sand-cast Mg-10Gd-3Y-0.5Zr alloy,and then systematically investigate the mechanical behavior of the T6-treated alloy from room temperature to 300℃.It turned out that the optimum T6 heat-treatments for the tested alloy are 525℃×12 h+225℃×14 h and 525℃×12 h+250℃×12 h which integrated age-hardening and tensile properties into account,respectively.The strength of the T6-treated alloy indicates obvious anomalous temperature dependence from room temperature to 300℃,namely both ultimate tensile strength and yield strength of the tested alloy firstly increase with tensile temperature,and then decrease as temperature increases further.Elongation increased with temperature monotonously.The tensile fracture mode of the tested alloy changes from transgranular fracture to intergranular fracture with the increasing of test temperature.

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篇名	High temperature mechanical behavior of low-pressure sand-cast Mg-Gd-Y-Zr magnesium alloy
来源期刊	镁合金学报(英文)	学科	工学
关键词	MG-GD-Y-ZR Heat treatment High temperature tensile property Anomalous temperature dependence
年，卷（期）	2019,（4）	所属期刊栏目
研究方向		页码范围	597-604
页数	8页	分类号	TG1
字数		语种
DOI