Effect of intermetallics on susceptibility of Mg alloy welds to liquation cracking

被引：10
|
作者：
Yuan, Tao [1 ,2 ]
Yu, Zhanliang [1 ,2 ]
Wang, Xuan [1 ,2 ]
Chen, Shujun [1 ,2 ]
机构：
[1] Beijing Univ Technol, Welding Res Inst, Minist Educ, Beijing, Peoples R China
[2] Beijing Univ Technol, Engn Res Ctr Adv Mfg Technol Automot Components, Minist Educ, Beijing, Peoples R China
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2020年 / 25卷 / 06期
关键词：
Magnesium alloys; intermetallic compounds; liquation cracking; heat treatment; MECHANICAL-PROPERTIES; HEAT-TREATMENT; HOT CRACKING; MAGNESIUM; MICROSTRUCTURE; ZONE;
D O I：
10.1080/13621718.2020.1747198
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The circular-patch welding test was used to study the liquation and liquation cracking of AZ-series Mg alloys. A heat treatment was carried out on the as-received AZ91 alloy to dissolve the gamma(Mg17Al12) particles before welding. The circular-patch welding test was then conducted on the heat-treated, as-received AZ91 alloy using AZ61 and AZ91 filler wires. The results showed that the susceptibility of AZ91 alloy to liquation and liquation cracking was significantly reduced by the dissolution of massive gamma(Mg17Al12) particles via a heat treatment before welding as the liquation mechanism was changed. Both constitutional liquation and incipient melting occurred in the partially melted zone of the as-received AZ91 welds, while only incipient melting occurred in the heat-treated AZ91 welds.
引用
收藏
页码：496 / 502
页数：7
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