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Effect of Segregation of Secondary Phase Particles and "S" Line on Tensile Fracture Behavior of Friction Stir-Welded 2024Al-T351 Joints
Z. Zhang; B. L. Xiao; Z. Y. Ma
2013
Source PublicationMetallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN1073-5623
Volume44AIssue:9Pages:4081-4097
AbstractA 5-mm-thick 2024Al-T351 plate was friction stir welded (FSWed) at welding speeds of 100, 200, and 400 mm min(-1) with a constant rotation rate of 800 rpm, and the microstructure and tensile fracture behavior of the joints were investigated in detail. FSW resulted in the redistribution of secondary phase particles along the recrystallized grain boundaries at the nugget zone (NZ), forming linear segregation bands consisting of secondary phase particles. The segregation bands, mainly present in the shoulder-driven zone, were believed to result from periodic material flow, with the average band spacing on the longitudinal and horizontal cross sections equal to the tool advancement per revolution. At a low welding speed of 100 mm min(-1), in spite of the highest density of segregation bands, the FSWed 2024Al-T351 joint fractured along the low hardness zone (LHZ) of the heat-affected zone because of large hardness gap between NZ and LHZ. Increasing the welding speed to 200 and 400 mm min(-1) reduced both the hardness gap between NZ and LHZ and the density of segregation bands. In this case, the segregation bands played a role, resulting in unusual fracture of the joints along the segregation bands. The "S" line originated from the oxide film on the initial butting surfaces and did not affect the fracture behavior of the FSWed 2024Al-T351 joints. (C) The Minerals, Metals & Materials Society and ASM International 2013
description.department[zhang, z. ; xiao, b. l. ; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhang, z (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; zyma@imr.ac.cn
KeywordAluminum-alloy Mechanical-properties Welding Parameters Heat-treatment Material Flow Mg Alloy Microstructure Fatigue Deformation Visualization
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71699
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Z. Zhang,B. L. Xiao,Z. Y. Ma. Effect of Segregation of Secondary Phase Particles and "S" Line on Tensile Fracture Behavior of Friction Stir-Welded 2024Al-T351 Joints[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2013,44A(9):4081-4097.
APA Z. Zhang,B. L. Xiao,&Z. Y. Ma.(2013).Effect of Segregation of Secondary Phase Particles and "S" Line on Tensile Fracture Behavior of Friction Stir-Welded 2024Al-T351 Joints.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,44A(9),4081-4097.
MLA Z. Zhang,et al."Effect of Segregation of Secondary Phase Particles and "S" Line on Tensile Fracture Behavior of Friction Stir-Welded 2024Al-T351 Joints".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 44A.9(2013):4081-4097.
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