Diminishing intermetallic compound layer in ultrasonic vibration enhanced friction stir welding of aluminum alloy to magnesium alloy

被引：68
作者：
Lv, X. Q. [1 ]
Wu, C. S. [1 ]
Padhy, G. K. [1 ]
机构：
[1] Shandong Univ, Inst Mat Joining, MOE Key Lab Liquid Solid Struct Evolut & Mat Proc, Jinan 250061, Peoples R China
来源：
MATERIALS LETTERS | 2017年 / 203卷
基金：
中国国家自然科学基金;
关键词：
Welding; Intermetallic alloys and compounds; Ultrasonic vibrations; Friction stir welding; Aluminum alloy; Magnesium alloy; AL; MICROSTRUCTURE; JOINTS;
D O I：
10.1016/j.matlet.2017.05.090
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Intermetallic compound layers of friction stir welded Al-Mg joints without and with ultrasonic vibrations were investigated. Microstructure and chemical analysis showed that the conventional Al/Mg weld interface constitutes an intermetallic bi-layer of Al3Mg2 + Al12Mg17. Application of ultrasonic vibrations in welding process diminished the bi-layer into mono-layer of reduced overall thickness. Tool offset influenced the chemical composition of intermetallic compound layer in the joints with ultrasonic vibrations. Complete removal of intermetallic compound layer was achieved by increasing ultrasonic power to 340 W. Mechanical tests revealed that the weld joint with ultrasonic vibrations exhibits improved tensile strength and fracture morphology. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：81 / 84
页数：4
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