Effects of nano-SiC particles on the FSSW welded AZ31 magnesium alloy joints

被引：14

作者：

Wu, D. ^{[1
]}

Shen, J. ^{[1
]}

Lv, L. ^{[1
]}

Wen, L. ^{[1
]}

Xie, X. ^{[1
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2017年 / 33卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Friction stir spot welding; SiC particle; Mechanical property; Magnesium alloy; Heat treatment; MECHANICAL-PROPERTIES; FRICTION; MICROSTRUCTURES; SPEED;

D O I：

10.1080/02670836.2016.1254891

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure of nano-SiC enhancing friction stir spot welding (FSSW) joint with dwell time of 3s was characterised by an onion ring structure which consisted of alternate SiC-free zones and SiC-rich zones where SiC particles refined the grains. However, onion ring structure disappeared and SiC particles dispersed homogeneously when dwell time was 5s. The microhardness of stir zone (SZ) and tensile shear load of SiC enhancing FSSW joint were higher than those of conventional FSSW joints. After heat treatment at 200 degrees C for an hour, grains of the SZ grew substantially and coursed reduction in mechanical properties of joints, while grain size of SZ and tensile shear load of SiC enhancing joint was invariant but the microhardness of SZ increased.

引用

页码：998 / 1003

页数：6

共 27 条

[1] THE ROLE OF EQUIAXED PARTICLES ON THE YIELD STRESS OF COMPOSITES [J].