Ultra-high cycle fatigue behavior of Ti-6Al-4V alloy

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	Ultra-high cycle fatigue behavior of Ti-6Al-4V alloy
	Zuo Jinghui ; Wang Zhongguang ; Han Enhou
刊名	ACTA METALLURGICA SINICA
	2007-07-01
卷号	43 期号:7 页码:705-709
关键词	ultra-high cycle fatigue fatigue strength fatigue limit bimodal microstructure basketweave microstruture
ISSN号	0412-1961
通讯作者	Han Enhou(ehhan@imr.ac.cn)
英文摘要	The fatigue S-N curves of Ti-6Al-4V alloys with the bimodal and basketweave microstructures were determined between 10(5)-10(9) cyc using the ultrasonic fatigue testing system under a loading frequency of 20 kHz. The fracture surfaces of specimens were investigated with SEM. The results show that the S-N curves of Ti-6Al-4V with two kinds of microstructures continue to decrease with increasing the number of cycles and have no horizontal asymptote in the regime of 10(5)-10(9) cyc, so no conventional fatigue limits exist for Ti-6Al-4V with the two microstructures. SEM analysis shows that the crack initiation sites change from the surface to interior of specimens with decreasing the load amplitude, and therefore formed a bimodal failure distribution. The fatigue lifetime is higher under the frequency of 20 kHz as compared with that under the frequency of 25 Hz. Especially, the fatigue behavior of the basketweave microstructure shows more pronounced frequency effect than that of bimodal microstructure.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000248548200007
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/91531]
专题	金属研究所_中国科学院金属研究所
通讯作者	Han Enhou
作者单位	1.Chinese Acad Sci, Inst Met Res, Environm Corros Ctr, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zuo Jinghui,Wang Zhongguang,Han Enhou. Ultra-high cycle fatigue behavior of Ti-6Al-4V alloy[J]. ACTA METALLURGICA SINICA,2007,43(7):705-709.
APA	Zuo Jinghui,Wang Zhongguang,&Han Enhou.(2007).Ultra-high cycle fatigue behavior of Ti-6Al-4V alloy.ACTA METALLURGICA SINICA,43(7),705-709.
MLA	Zuo Jinghui,et al."Ultra-high cycle fatigue behavior of Ti-6Al-4V alloy".ACTA METALLURGICA SINICA 43.7(2007):705-709.