Fatigue Behaviour of 7N01-T4 Aluminium Alloy Welded by Ultrasonic-Assisted Friction Stir Welding

doi:10.3390/ma13204582

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Fatigue Behaviour of 7N01-T4 Aluminium Alloy Welded by Ultrasonic-Assisted Friction Stir Welding
	Zhang, Zhiqiang ; He, Changshu ; Li, Ying ; Wei, Jingxun ; Zhai, Menggang ; Zhao, Su ; Zhao, Xiang
刊名	MATERIALS
	2020
卷号	13 期号:20
关键词	MATERIAL-FLOW BEHAVIOR MECHANICAL-PROPERTIES RESIDUAL-STRESSES KISSING BOND VIBRATION MICROSTRUCTURE STRENGTH JOINTS TOOL EVOLUTION
DOI	10.3390/ma13204582
英文摘要	This study investigates the effects of axial ultrasonic vibration on the microstructure evolution, residual stresses distribution and fatigue fracture behaviour of a 7N01-T4 joint, and demonstrates that ultrasonic vibration can significantly promote the flow of plasticised metals, expand the stirred zone (SZ) width and refine the grain size. The longitudinal residual stresses of the joints are dominant, and the peak longitudinal residual stresses of the thermo-mechanically affected zone (TMAZ) on the advancing side (AS) (TMAZ-AS) in the ultrasonic-assisted friction stir welding (UAFSW) joint are 31.5 MPa lower than those in the friction stir welding (FSW) joint. Compared to that of FSW joints, the fatigue strength of UAFSW joints increases by 20 MPa at 10(7) cycles (stress ratio of R = 0.1). At high-stress levels, crack initiation occurs at the TMAZ-AS, and is mainly attributed to high residual stresses and second-phase particles. At low-stress levels, fatigue cracks are likely to initiate in the transition zone (TZ).
学科主题	Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20441]
专题	2020专题
作者单位	1.He, CS (corresponding author), Northeastern Univ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China. 2.He, CS (corresponding author), Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, Zhiqiang,He, Changshu,Li, Ying,et al. Fatigue Behaviour of 7N01-T4 Aluminium Alloy Welded by Ultrasonic-Assisted Friction Stir Welding[J]. MATERIALS,2020,13(20).
APA	Zhang, Zhiqiang.,He, Changshu.,Li, Ying.,Wei, Jingxun.,Zhai, Menggang.,...&Zhao, Xiang.(2020).Fatigue Behaviour of 7N01-T4 Aluminium Alloy Welded by Ultrasonic-Assisted Friction Stir Welding.MATERIALS,13(20).
MLA	Zhang, Zhiqiang,et al."Fatigue Behaviour of 7N01-T4 Aluminium Alloy Welded by Ultrasonic-Assisted Friction Stir Welding".MATERIALS 13.20(2020).