Numerical simulation of DE- GMAW of magnesium alloy cylinder  

作　　者：Fang Naiwen Wang Liping Li Liansheng Zhang Haibo Zhang Yingehun Ma Qing Jun Song Nan 方乃文;王丽萍;李连胜;张海波;张迎春;马青军;宋南(School of Material Science ＆ Engineering Harbin University of Science and Technology,Harbin 150080,China;Harbin Welding Institute Limited Company,Harbin 150028,China)

机构地区：[1]School of Material Science & Engineering Harbin University of Science and Technology, Harbin 150080, China [2]Harbin Welding Institute Limited Company, Harbin 150028, China

出　　处：《China Welding》2018年第2期24-30,共7页中国焊接（英文版）

摘　　要：Double-electrode gas shielded arc welding （ DE - GMAW） was used to weld the magnesium alloy cylinder with the diameter of 200 mm and the thickness of 6 mm. In order to study the residual stress distribution of AZ31B magnesiunl alloy welding point, numerical sinmlation of welding temperature field, stress field and residual stress were carried out by MSC. mare software. The results show that the residual stress in the weld and the heat affected zone is large, and with the increase of the distance away from the weld center, the residual stress decreases. In most areas, the longitudinal residual stress is greater than the transverse residual stress （except for the inside and outside surfaces of the weld） , all of which provides theoretical support for the study of magnesiunl alloy welding residual stress.Double-electrode gas shielded arc welding （ DE - GMAW） was used to weld the magnesium alloy cylinder with the diameter of 200 mm and the thickness of 6 mm. In order to study the residual stress distribution of AZ31B magnesiunl alloy welding point, numerical sinmlation of welding temperature field, stress field and residual stress were carried out by MSC. mare software. The results show that the residual stress in the weld and the heat affected zone is large, and with the increase of the distance away from the weld center, the residual stress decreases. In most areas, the longitudinal residual stress is greater than the transverse residual stress （except for the inside and outside surfaces of the weld） , all of which provides theoretical support for the study of magnesiunl alloy welding residual stress.

关 键 词：AZ31B magnesiunl double-electrode gas shielded arc welding stress and strain field numerical sinmlation 

分 类 号：TG404[金属学及工艺—焊接]