Characteristics of Microstructure and Microhardness of Friction Stir Welded Joints for AZ31 Magnesium Alloy

被引：2

作者：

Wang Shanlin ^{[1
]}

Zhang Hengyv ^{[1
]}

Xing Li ^{[1
]}

机构：

[1] Nanchang Hangkong Univ, Sch Aeronaut Mfg Engn, Nanchang 330063, Peoples R China

来源：

MECHANICAL SCIENCE AND ENGINEERING IV | 2014年 / 472卷

关键词：

Friction stir welding; AZ31 magnesium alloy; heat treatment; Microstructure;

D O I：

10.4028/www.scientific.net/AMM.472.612

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The joints of magnesium alloy plate with 4 mm thickness was successfully welded by friction stir welding, and the characteristics in microstructure and microhardness of joints after heat treatment were investigated. The results indicate that the tensile strength of as welded joint exceeds 220 MPa, nearly 83% strength of basic metals. During heat treatment, the grains in nugget zone grow gradually, while the grain recrystallization was occurred in heat affected zone and basic metal zone when the temperature is 150 degrees C. As the temperature increases continuously, the grains will grow obviously. The average microhardness of joint will increase and reaches a maximum of 73 Hv at 250 degrees C, and then will decrease sharply with increase of heat treatment temperature.

引用

页码：612 / 616

页数：5

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