Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy

IMR OpenIR

	Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy
	Liu, JR ; Li, SX ; Li, D ; Yang, R
通讯作者	Liu, JR()
	2004-05-01
发表期刊	MATERIALS TRANSACTIONS
ISSN	1345-9678
卷号	45 期号:5 页码:1577-1585
摘要	The effects of aging on the room-temperature fatigue-crack growth (FCG) behavior of a newly developed high-temperature near-a titanium alloy (Ti-5.6Al-4.8Sn-2Zr-1.0Mo-0.32Si-0.8Nd) with both bimodal and lamellar microstructures were investigated. The results indicate that aging had a relatively small effect on the FCG behaviors of the concerned alloy. The effect of aging is more pronounced on the lamellar than on the bimodal microstructure. This effect reduces with aging time especially for the lamellar microstructure. TEM and SEM studies were performed to gain insight into the deformation behavior and crack propagation mechanisms of the alloy. Dependence of the FCG rates on aging treatment is rationalized by considering changes in crack path tortuosity, roughness-induced crack closure and deformation uniformity. Slip reversibility is also considered. The work suggests that the amount and size of alpha(2) particles based on Ti3Al is mainly responsible for this dependence in the high DeltaK range.
关键词	aging effect fatigue crack growth behavior high-temperature titanium alloy
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000221863900034
出版者	JAPAN INST METALS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/80911
通讯作者	Liu, JR
作者单位	1.Chinese Acad Sci, Inst Met Res, Titanium Alloy Lab, 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	Liu, JR,Li, SX,Li, D,et al. Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy[J]. MATERIALS TRANSACTIONS,2004,45(5):1577-1585.
APA	Liu, JR,Li, SX,Li, D,&Yang, R.(2004).Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy.MATERIALS TRANSACTIONS,45(5),1577-1585.
MLA	Liu, JR,et al."Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy".MATERIALS TRANSACTIONS 45.5(2004):1577-1585.