Fatigue crack growth behavior of 7050 aluminum alloy friction stir welded joint

doi:10.12073/j.hjxb.20200709002

	Fatigue crack growth behavior of 7050 aluminum alloy friction stir welded joint
	Jin, Yuhua 1,2; Zhang, Lin 2; Zhang, Liangliang 2; Wang, Xijing 2
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2020-10-25
卷号	41 期号:10 页码:11-16
关键词	Aluminum alloys Cracks Fatigue crack propagation Friction Friction stir welding Growth rate Textures Welds 7050 aluminum alloy Fatigue crack growth behavior Fatigue striations Fracture surfaces Friction stir welded joints Friction stir welding joints Steady-state propagation Thermomechanically affected zones
ISSN号	0253360X
DOI	10.12073/j.hjxb.20200709002
英文摘要	The fatigue crack growth behavior of 5 mm thick 7050 aluminum alloy friction stir welding joints in different areas was analyzed and studied. The results show that the fatigue crack growth rate is the fastest in the weld nugget zone. The second is the position of the thermo-mechanically affected zone of advancing side. The fatigue crack growth rate is the slowest in the thermo-mechanically affected zone of retreating side. The fatigue crack is propagated by intergranular and transgranular mixing in the weld nugget zone, while the crack is propagated by transgranular in the thermo-mechanically affected zone. The deflection of the crack and the generation of the crack branch will reduce the fatigue crack growth rate. In the initial stage of fatigue crack growth, the fracture surface of the weld nugget zone is distributed with grain size fracture planes, and fatigue striations are generated; fatigue striations did not occur in the thermo-mechanically affected zone, but tire indentation patterns appear here. During the steady-state propagation of fatigue crack, the crack growth rate increased, and fatigue striations appeared in the weld nugget zone and the thermo-mechanically affected zone, and secondary cracks were generated. Copyright © 2020 Transactions of the China Welding Institution. All rights 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/150839]
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.Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Jin, Yuhua,Zhang, Lin,Zhang, Liangliang,et al. Fatigue crack growth behavior of 7050 aluminum alloy friction stir welded joint[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2020,41(10):11-16.
APA	Jin, Yuhua,Zhang, Lin,Zhang, Liangliang,&Wang, Xijing.(2020).Fatigue crack growth behavior of 7050 aluminum alloy friction stir welded joint.Hanjie Xuebao/Transactions of the China Welding Institution,41(10),11-16.
MLA	Jin, Yuhua,et al."Fatigue crack growth behavior of 7050 aluminum alloy friction stir welded joint".Hanjie Xuebao/Transactions of the China Welding Institution 41.10(2020):11-16.