Characterization of Mg/Al butt joints welded by gas tungsten arc filling with Zn-29.5Al-0.5Ti filler metal

被引：31
作者：
Liu, Fei [1 ]
Wang, Hongyang [1 ]
Liu, Liming [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Liaoning Adv Welding & Joining Technol, Dalian 116024, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2014年 / 90卷
基金：
国家杰出青年科学基金;
关键词：
Mg/Al welding; Zn-Al-Ti; Microstructure; Gibbs free energy; MAGNESIUM ALLOY; ALUMINUM-ALLOY; MG ALLOY; AL; MICROSTRUCTURE; AZ31B;
D O I：
10.1016/j.matchar.2014.01.010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The multivariate alloying design of a welding joint is used in the Mg to Al welding process. A Zn-29.5Al-0.5Ti alloy is added as filler metal in gas tungsten arc welding of Mg and Al alloy joint based on the analysis of Al and Mg alloy characteristics. The tensile strength, microstructure, and phase constitution of the weld seam are analyzed. The formation of brittle and hard Mg-Al intermetallic compounds is avoided because of the effects of Zn, Al, and Ti. The average tensile strength of the joint is 148 MPa. Al3Ti is first precipitated and functions as the nucleus of heterogeneous nucleation during solidification. Moreover, the precipitated Al-MgZn2 hypoeutectic phase exhibited a feather-like structure, which enhances the property of the Mg-Al dissimilar joint. Crown Copyright (c) 2014 Published by Elsevier Inc. All rights reserved.
引用
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页码：1 / 6
页数：6
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