Process analysis on friction stir spot welding without key hole between magnesium and steel dissimilar alloys

	Process analysis on friction stir spot welding without key hole between magnesium and steel dissimilar alloys
	Wang, Xijing; Li, Weihong; Zhao, Gang
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2014-12-25
卷号	35 期号:12 页码:23-26
关键词	Alloy steel Dynamic recrystallization Friction Friction stir welding Galvanizing Heat affected zone Magnesium printing plates Microstructure Spot welding Textures Element distribution analysis Friction stir spot welding Galvanized steel sheets Microstructure analysis Spot-welding process Thermomechanically affected zones Uniform distribution Welding process
ISSN号	0253360X
英文摘要	The magnesium alloy AZ31B sheet to DP600 galvanized steel sheet were spot welded by friction stir spot welding (FSSW) without keyhole under the condition of the optimal welding parameters. The sound joint with strength of 8.7 kN was obtained. The whole spot welding process was divided into three phases, pin inserting (I), pin stirring and withdrawing (II), pin withdrawing finished (III). The microstructure analysis showed that in the welding nugget zone, the grain of steel became lathy that flowed significantly. Both the steel and the magnesium alloy in the thermo-mechanically affected zone underwent a dynamic recrystallization process resulting in a coarse grain. The grain of the steel was longer and the grain magnesium alloy became much more coarsened. In the stirring pin withdrawing zone, the grain size of magnesium alloy was small with a uniform distribution. These equiaxed grains were completely transformed. In the heat affected zone, the steel grain was thicker and longer, and the magnesium alloy grain was coarse. The element distribution analysis showed that in the first stage, the interface between magnesium and steel had no diffusion, while in the stage II and stage III, the diffusion of main elements occured in the nugget area. ©, 2014, Harbin Research Institute of Welding. All right reserved.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112636]
专题	材料科学与工程学院
作者单位	State Key Laboratory of Gansu Advanced Non-Ferrous Materials, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wang, Xijing,Li, Weihong,Zhao, Gang. Process analysis on friction stir spot welding without key hole between magnesium and steel dissimilar alloys[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2014,35(12):23-26.
APA	Wang, Xijing,Li, Weihong,&Zhao, Gang.(2014).Process analysis on friction stir spot welding without key hole between magnesium and steel dissimilar alloys.Hanjie Xuebao/Transactions of the China Welding Institution,35(12),23-26.
MLA	Wang, Xijing,et al."Process analysis on friction stir spot welding without key hole between magnesium and steel dissimilar alloys".Hanjie Xuebao/Transactions of the China Welding Institution 35.12(2014):23-26.