Dissimilar friction stir welding of 6061 aluminum alloy and AZ31 magnesium alloy assisted with ultrasonic

被引：115

作者：

Ji, Shude ^{[1
]}

Meng, Xiangchen ^{[2
]}

Liu, Zhenlei ^{[1
]}

Huang, Ruofei ^{[1
]}

Li, Zhengwei ^{[2
]}

机构：

[1] Shenyang Aerosp Univ, Fac Aerosp Engn, Shenyang 110136, Peoples R China

[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

MATERIALS LETTERS | 2017年 / 201卷

基金：

中国国家自然科学基金;

关键词：

Friction stir welding; Metals and alloys; Intermetallic alloys and compounds; Stationary shoulder; Ultrasonic; Ductile fracture; MICROSTRUCTURAL EVOLUTIONS; MECHANICAL-PROPERTIES; VIBRATION; COMPOSITES;

D O I：

10.1016/j.matlet.2017.05.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Both simple interface joining and continuous intermetallic compounds (IMCs) layer formed at the interface of Al/Mg alloys during friction stir welding (FSW) deteriorates mechanical property. Based on stationary shoulder, ultrasonic was employed to assist FSW of 6061-T6 and AZ31B alloys to increase interface joining length and mixture degree of Al/Mg alloys at nugget zone (NZ). Sound joint with smooth surface is obtained, resulting from the combined effect of stationary shoulder and ultrasonic. Ultrasonic are beneficial to increasing material flow, interface joining length and mixture degree of Al/Mg alloys, improving mechanical interlocking. The tensile strength and elongation of joint with ultrasonic reach 120 MPa and 1.5%, which are higher than that without ultrasonic. Additionally, local fracture surface morphology consists of some dimples, presenting mixed fracture containing brittle and ductile fractures. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：173 / 176

页数：4

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