Effect of rolling on friction stir welded joints of aluminum alloy

doi:10.12073/j.hjxb.2019400099

	Effect of rolling on friction stir welded joints of aluminum alloy
	Jin, Yuhua 1,2; Wu, Yongwu 1; Wang, Xijing 1,2; Guo, Tingbiao 1,2
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2019-04-25
卷号	40 期号:4 页码:50-54
关键词	Compressive stress Friction Friction stir welding Grain refinement Hardness Mechanical properties Microstructure Rolling Welds 7050 aluminum alloy Friction stir welded joints Joint surfaces Residual compressive stress Severe plastic deformations Subsurface layer Surface layers Weld nuggets
ISSN号	0253360X
DOI	10.12073/j.hjxb.2019400099
英文摘要	The upper and back surface of a friction stir welded joint of 5 mm thick 7050 aluminum alloy were rolled by a self-made rolling head. It was compared with the welded joints without rolling. The effect of rolling on the performance of welded joints was studied. The results showed that the roughness of joint surface was reduced from 9.58 μm (maximum value) to 0.85 μm (mean value). The surface layer happened severe plastic deformation, and the grains were remarkably refined to form a fine grain layer of about 200 μm thick. The grain refinement of the subsurface layer was reduced, and a shear band was generated in the weld nugget zone. The hardness of the joint surface was obviously improved, and the average hardness was as high as HV210, which was 91% higher than the hardness HV110 before rolling. The residual stress of the joint surface changed from the original tensile stress to the compressive stress, and the maximum residual compressive stress field depth was about 200 μm. The source was moved from the surface layer to the subsurface layer, and the fatigue life was significantly improved. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113920]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Material Science and Engineering Institute, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Jin, Yuhua,Wu, Yongwu,Wang, Xijing,et al. Effect of rolling on friction stir welded joints of aluminum alloy[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2019,40(4):50-54.
APA	Jin, Yuhua,Wu, Yongwu,Wang, Xijing,&Guo, Tingbiao.(2019).Effect of rolling on friction stir welded joints of aluminum alloy.Hanjie Xuebao/Transactions of the China Welding Institution,40(4),50-54.
MLA	Jin, Yuhua,et al."Effect of rolling on friction stir welded joints of aluminum alloy".Hanjie Xuebao/Transactions of the China Welding Institution 40.4(2019):50-54.