Effect of corrosive environment on fatigue property and crack propagation behavior of Al 2024 friction stir weld

IMR OpenIR

	Effect of corrosive environment on fatigue property and crack propagation behavior of Al 2024 friction stir weld
其他题名	Effect of corrosive environment on fatigue property and crack propagation behavior of Al 2024 friction stir weld
	Wang Lei; Hui Li; Zhou Song; Xu Liang; He Bo
	2016
发表期刊	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN	1003-6326
卷号	26 期号:11 页码:2830-2837
摘要	In this investigation, 2024 aluminium alloy plates were friction stir welded, a sequence of experiments was performed including fatigue and crack propagation tests in air, under pre-corrosion and in a 3.5% NaCl solution, in combination with fractography analyses of near-threshold region, Paris region and finial fracture region with the aid of scanning electron microscopy (SEM). Results showed that the corrosive environment caused a dramatical decrease in fatigue lives of FS welds, the corrosion fatigue lives of FS welds were almost a half of those of the as-welded specimens. The crack growth rates in FS welds were higher than their counterparts in base materials, under the corrosive environment, the crack growth rate differences between base materials and FS welds become increasingly apparent with the increase of stress intensity factor range Delta K, but the pre-corrosion process had little effect on the FS welds' crack propagation behavior except for shortening the crack initiation lives greatly.
其他摘要	In this investigation, 2024 aluminium alloy plates were friction stir welded, a sequence of experiments was performed including fatigue and crack propagation tests in air, under pre-corrosion and in a 3.5% NaCl solution, in combination with fractography analyses of near-threshold region, Paris region and finial fracture region with the aid of scanning electron microscopy (SEM). Results showed that the corrosive environment caused a dramatical decrease in fatigue lives of FS welds, the corrosion fatigue lives of FS welds were almost a half of those of the as-welded specimens. The crack growth rates in FS welds were higher than their counterparts in base materials, under the corrosive environment, the crack growth rate differences between base materials and FS welds become increasingly apparent with the increase of stress intensity factor range ΔK, but the pre-corrosion process had little effect on the FS welds' crack propagation behavior except for shortening the crack initiation lives greatly.
关键词	ALUMINUM-ALLOY GROWTH PERFORMANCE JOINTS friction stir welding aluminium alloy fatigue crack growth rate corrosion
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [General Project of Scientific Research of Liaoning Provincial Education Department, China] ; [Natural Science Foundation of Liaoning Province, China]
CSCD记录号	CSCD:5874610
引用统计	被引频次：8[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/145626
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Wang Lei,Hui Li,Zhou Song,et al. Effect of corrosive environment on fatigue property and crack propagation behavior of Al 2024 friction stir weld[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2016,26(11):2830-2837.
APA	Wang Lei,Hui Li,Zhou Song,Xu Liang,&He Bo.(2016).Effect of corrosive environment on fatigue property and crack propagation behavior of Al 2024 friction stir weld.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,26(11),2830-2837.
MLA	Wang Lei,et al."Effect of corrosive environment on fatigue property and crack propagation behavior of Al 2024 friction stir weld".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 26.11(2016):2830-2837.