Study on Laser Welding Process, Microstructure and Properties of AZ31B Magnesium Alloy

被引:0
作者
Yulang Xu
Peng Qian
Yanxin Qiao
Jingyong Li
Jinshen Zhang
机构
[1] Jiangsu University of Science and Technology,Advanced Welding Technology Provincial Key Laboratory
[2] Jiangsu University of Science and Technology,Department of Material Science and Engineering
来源
Transactions of the Indian Institute of Metals | 2022年 / 75卷
关键词
AZ31B magnesium alloy; Laser beam welding; Microstructure; Mechanical properties;
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中图分类号
学科分类号
摘要
AZ31B magnesium alloy sheets of 4.0 mm in thickness were successfully butt-welded by using laser beam welding (LBW). The effects of laser beam welding parameters such as laser power, welding speed and focal position on microstructure revolution and mechanical properties of AZ31B magnesium alloy were investigated. The results showed that the welded joints fabricated using a laser power of 2.5 kW, welding speed of 30 mm/s and focal position of + 2 mm presented optimized macroscopic morphology and best tensile properties compared with the other joints. The formation of fine grains in weld zone and uniformly distributed fine precipitates were the main reasons for superior tensile properties of these joints. In addition, there was only α-Mg phase and no β-Mg17Al12 was observed in the weld zone. The spherical particles in the weld zone were α-Mg segregation rich in Al and Mn.
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页码:2905 / 2912
页数:7
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