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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
Source PublicationMaterials & Design
ISSN0261-3069
Volume52Pages:706-712
Abstract1.7 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.
description.department[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
KeywordAluminium 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
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71248
Collection中国科学院金属研究所
Recommended Citation
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.
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