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Effects of Rotation Rates on Microstructure, Mechanical Properties, and Fracture Behavior of Friction Stir-Welded (FSW) AZ31 Magnesium Alloy
J. Yang; D. Wang; B. L. Xiao; D. R. Ni; Z. Y. Ma
2013
Source PublicationMetallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN1073-5623
Volume44AIssue:1Pages:517-530
AbstractThree rotation rates were selected for friction stir welded (FSW) rolled AZ31 plates, at a constant welding speed of 100 mm/minutes. As the rotation rate was increased from 800 and 2000 to 3500 rpm, the nugget shape varied from a basin-or ellipse-shaped homogeneous structure to a two-layer structure. The grain characteristic was similar in the nugget zones (NZs) at 800 and 2000 rpm, with the column-rotated basal plane. However, at 3500 rpm, the equiaxed fine grains and column-rotated basal plane were found in the lower zone of the two-layer structure, while elongated coarse grains and the basal plane with little inclination comparable to that in the parent material (PM) were detected in the upper zone. Tensile tests indicated that the fracture behaviors of the FSW AZ31 joints at 800 and 2000 rpm were similar with the weak zones being located at the NZ middle and along the boundary between the NZ and the thermo-mechanically affected zone, while contrasting fracture features were found at 3500 rpm. The ultimate tensile strength (UTS) of the joints increased as the rotation rate increased, with the highest UTS being about 95 pct of the PM at 3500 rpm. The variations in the strength and fracture behavior of the joints with the rotation rate were accounted for by the variation in the texture. DOI: 10.1007/s11661-012-1373-4 (C) The Minerals, Metals & Materials Society and ASM International 2012
description.department[yang, j. ; wang, d. ; xiao, b. l. ; ni, d. r. ; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; yang, j (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zyma@imr.ac.cn
KeywordAl-zn Alloy Mg Alloys Deformation Mechanisms Texture Development Aluminum-alloy Grain-size Evolution Flow Plasticity Parameters
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71626
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. Yang,D. Wang,B. L. Xiao,et al. Effects of Rotation Rates on Microstructure, Mechanical Properties, and Fracture Behavior of Friction Stir-Welded (FSW) AZ31 Magnesium Alloy[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2013,44A(1):517-530.
APA J. Yang,D. Wang,B. L. Xiao,D. R. Ni,&Z. Y. Ma.(2013).Effects of Rotation Rates on Microstructure, Mechanical Properties, and Fracture Behavior of Friction Stir-Welded (FSW) AZ31 Magnesium Alloy.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,44A(1),517-530.
MLA J. Yang,et al."Effects of Rotation Rates on Microstructure, Mechanical Properties, and Fracture Behavior of Friction Stir-Welded (FSW) AZ31 Magnesium Alloy".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 44A.1(2013):517-530.
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