Ultra-high cycle fatigue behavior of the as-extruded magnesium alloy ZK60

IMR OpenIR

	Ultra-high cycle fatigue behavior of the as-extruded magnesium alloy ZK60
	Xu Daokui ; Liu Lu ; Xu Yongbo ; Han Enhou
通讯作者	Han Enhou(ehhan@imr.ac.cn)
	2007-02-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	43 期号:2 页码:144-148
摘要	The experiments of the fatigue behavior of the as-extruded Mg alloy ZK60 in a regime of 10(6)-10(9) cyc revealed that a plateau exists in the regime of 5 x 10(6)-10(8) cyc, whereas the fatigue strength gradually decreases in the regime of 10(8)-10(9) cyc, and the fatigue strength corresponding to 10(9) cyc is (90 +/- 5) MPa. SEM observation indicated that the fatigue crack mostly initiated at the surface or subsurface for the samples failed in the regime of 5 x 10(6)-10(8) cyc, and at the internal non-metallic inclusion for the samples failed between 10(8) and 10(9) cyc. Through determining the size of the fatigue crack initiation area, the fatigue strength of the alloy is estimated, which is basically consistent with the experimental results. Analysis of fractographs indicated that the formation of the fatigue crack initiation area is caused by the crack initiation at several inclusions and subsequent crack coalescence. Therefore, the fatigue strength seems not to be determined by the maximum inclusion, but by the " defect area " consisting of several inclusions. According to determination of the sizes of " defect areas " at different locations, the fatigue strength of the alloy can be effectively evaluated.
关键词	Mg alloy ultra-high cycle fatigue non-metallic inclusion fatigue strength
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000245188600006
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/89296
专题	中国科学院金属研究所
通讯作者	Han Enhou
作者单位	1.Chinese Acad Sci, Environm Corros Ctr, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xu Daokui,Liu Lu,Xu Yongbo,et al. Ultra-high cycle fatigue behavior of the as-extruded magnesium alloy ZK60[J]. ACTA METALLURGICA SINICA,2007,43(2):144-148.
APA	Xu Daokui,Liu Lu,Xu Yongbo,&Han Enhou.(2007).Ultra-high cycle fatigue behavior of the as-extruded magnesium alloy ZK60.ACTA METALLURGICA SINICA,43(2),144-148.
MLA	Xu Daokui,et al."Ultra-high cycle fatigue behavior of the as-extruded magnesium alloy ZK60".ACTA METALLURGICA SINICA 43.2(2007):144-148.