Effect of loading methods on the fatigue properties of dissimilar al/steel keyhole-free FSSW joints

doi:10.3390/MA13194247

	Effect of loading methods on the fatigue properties of dissimilar al/steel keyhole-free FSSW joints
	Zhang, Zhongke1 ; Yu, Yang2 ; Zhao, Huaxia 3; Tong, Hui 4
	2020-10-01
发表期刊	Materials
卷号	13 期号:19
摘要	The energy evolution, fatigue life and failure behaviour of dissimilar Al/steel keyhole-free Friction stir spot welding (FSSW) joints were studied under different fatigue loads. The absorption energy of fatigue fracture, the fracture mechanism and the sensitivity of the fatigue limits to the fatigue load parameters were analysed. It was found that the stress ratio R determines the fatigue limit Ff, while the fatigue limit Ff is not sensitive to the loading frequency. The high-frequency fatigue load will increase the displacement deformation μ and fatigue fracture absorption energy Ea of the spot-welded joint, which are larger under asymmetric fatigue loading than those under symmetrical fatigue loading. At the same time, the symmetrical fatigue load can form the steady-state hysteresis loop, while asymmetric fatigue loading cannot, but asymmetric fatigue loading exhibits the displacement increment of fatigue softening. The fracture failure of spot-welded joints is a multiple crack source and the mixed-mode of ductile and brittle fracture mechanism, which exhibits typical fatigue striations in the fatigue fractures. © 2020 by the authors.
关键词	Fracture Friction stir welding Spot welding Stress analysis Welds Absorption energies Ductile and brittle fractures Fatigue properties Fatigue striations Fracture mechanisms Friction stir spot welding Loading frequencies Spot-welded joints
DOI	10.3390/MA13194247
收录类别	SCI ; EI
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000587211000001
出版者	MDPI AG
EI入藏号	20204209352093
EI主题词	Fatigue of materials
EI分类号	538.2 Welding - 538.2.1 Welding Processes - 951 Materials Science
来源库	Compendex
分类代码	538.2 Welding - 538.2.1 Welding Processes - 951 Materials Science
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/115792
专题	材料科学与工程学院土木工程学院
作者单位	1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, Tongji University, Shanghai; 201804, China; 3.Aeronautical Key Laboratory for Welding and Joining Technologies, AVIC Manufacturing Technology Institute AECC, Beijing; 100024, China; 4.SAIC MOTOR Commercial Vehicle Technical Center, Body Department, Shanghai; 200090, China
第一作者单位	材料科学与工程学院
第一作者的第一单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Zhang, Zhongke,Yu, Yang,Zhao, Huaxia,et al. Effect of loading methods on the fatigue properties of dissimilar al/steel keyhole-free FSSW joints[J]. Materials,2020,13(19).
APA	Zhang, Zhongke,Yu, Yang,Zhao, Huaxia,&Tong, Hui.(2020).Effect of loading methods on the fatigue properties of dissimilar al/steel keyhole-free FSSW joints.Materials,13(19).
MLA	Zhang, Zhongke,et al."Effect of loading methods on the fatigue properties of dissimilar al/steel keyhole-free FSSW joints".Materials 13.19(2020).