Microstructure and mechanical properties of Al-Mg-Er sheets jointed by friction stir welding

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	Microstructure and mechanical properties of Al-Mg-Er sheets jointed by friction stir welding
	H. L. Hao; D. R. Ni; Z. Zhang; D. Wang; B. L. Xiao; Z. Y. Ma
	2013
发表期刊	Materials & Design
ISSN	0261-3069
卷号	52 页码:706-712
摘要	1.7 mm thick cold-rolled Al-Mg-Er alloy sheets under as-rolled and annealed conditions were subjected to friction stir welding (FSW). The as-rolled sheet showed fibrous tissues with a high density of dislocations. After annealing, the fibrous tissues were replaced by coarse, nearly-equiaxed grains similar to 18 mu m in size and the density of dislocations decreased greatly, resulting in significantly reduced hardness of the annealed sheet. After FSW, the nugget zone (NZ) of both the FSW joints of as-rolled and as-annealed sheets consisted of fine equiaxed recrystallised grains with sizes of 4.5 mu m and 4.3 mu m, respectively. For the joint of the as-rolled sheet, the dislocations in the NZ and thermomechanically affected zone (TMAZ) were significantly reduced and the NZ showed lower hardness than the base material (BM). However, for the joint of the as-annealed sheet, the NZ exhibited higher hardness than the BM due to significant grain refinement in the NZ. The joint of the as-rolled sheet showed a joint efficiency of 68% and fractured in the NZ but the joint of the as-annealed sheet had a joint efficiency of nearly 100% and fractured in the BM. (C) 2013 Elsevier Ltd. All rights reserved.
部门归属	[hao, h. l. ; ni, d. r. ; zhang, z. ; wang, d. ; xiao, b. l. ; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; xiao, bl (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; blxiao@imr.ac.cn
关键词	Aluminium Alloy Friction Stir Welding Microstructure Mechanical Properties Aluminum-alloy Joints Tool Pin Profile Process Parameters Fatigue Properties Tensile-strength Zr Additions Behavior Speed Zone
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/321006/71248
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. L. Hao,D. R. Ni,Z. Zhang,et al. Microstructure and mechanical properties of Al-Mg-Er sheets jointed by friction stir welding[J]. Materials & Design,2013,52:706-712.
APA	H. L. Hao,D. R. Ni,Z. Zhang,D. Wang,B. L. Xiao,&Z. Y. Ma.(2013).Microstructure and mechanical properties of Al-Mg-Er sheets jointed by friction stir welding.Materials & Design,52,706-712.
MLA	H. L. Hao,et al."Microstructure and mechanical properties of Al-Mg-Er sheets jointed by friction stir welding".Materials & Design 52(2013):706-712.