Influence of welding parameter on mechanical properties and fracture behavior of friction stir welded Al-Mg-Sc joints

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	Influence of welding parameter on mechanical properties and fracture behavior of friction stir welded Al-Mg-Sc joints
	Y. Tao; Z. Zhang; D. R. Ni; D. Wang; B. L. Xiao; Z. Y. Ma
	2014
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	612 页码:236-245
摘要	8.1-mm thick Al-Mg-Sc plates were friction stir welded (FSW) at tool rotation rates of 400-800 rpm and welding speeds of 100-400 mm/min to investigate the effect of welding parameter on the microstructure, mechanical property and fracture behavior of joints. The lazy S and kissing bond, with quite different morphologies, were observed in the stir zone at 400 and 600 rpm, attributing to insufficient material flow. However, neither of them were detected at 800 rpm. Ultimate tensile strength of the joints was nearly equal to that of the base metal with the joint efficiency being 97-99%. Facture behavior of the joints changed with the welding parameter and it was strongly affected by the lazy S and kissing bond. For the joints at 400 and 600 rpm, fracture occurred partially along the lazy Sat 100 mm/min or initiated at the kissing bond at 400 mm/min. However, the joints at 800 rpm exhibited a fracture independent of the lazy S or kissing bond. Furthermore, the present observations were compared with those made by other researchers and the reasons for insufficient material flow at lower rotation rates of 400 and 600 rpm were discussed. (C) 2014 Elsevier B.V. All rights reserved.
部门归属	[tao, y. ; zhang, z. ; ni, d. r. ; wang, d. ; xiao, b. l. ; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; ma, zy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zyma@imr.ac.cn
关键词	Friction Stir Welding Aluminum Alloys Microstructure Mechanical Properties Fracture Tensile Properties Magnesium Alloy Aluminum-alloy Kissing-bond Microstructure Recrystallization Evolution Al3sc
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73389
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Tao,Z. Zhang,D. R. Ni,et al. Influence of welding parameter on mechanical properties and fracture behavior of friction stir welded Al-Mg-Sc joints[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2014,612:236-245.
APA	Y. Tao,Z. Zhang,D. R. Ni,D. Wang,B. L. Xiao,&Z. Y. Ma.(2014).Influence of welding parameter on mechanical properties and fracture behavior of friction stir welded Al-Mg-Sc joints.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,612,236-245.
MLA	Y. Tao,et al."Influence of welding parameter on mechanical properties and fracture behavior of friction stir welded Al-Mg-Sc joints".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 612(2014):236-245.