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

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy
	J. R. Liu ; S. X. Li ; D. Li ; R. Yang
刊名	Materials Transactions
	2004
卷号	45 期号:5 页码:1577-1585
关键词	aging effect fatigue crack growth behavior high-temperature titanium alloy high-cycle fatigue microstructural influences silicide precipitation room-temperature stress ratio ti-6al-4v fracture propagation tensile phase
ISSN号	1345-9678
中文摘要	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.
原文出处	://WOS:000221863900034
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/35461]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	J. R. Liu,S. X. Li,D. Li,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	J. R. Liu,S. X. Li,D. Li,&R. Yang.(2004).Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy.Materials Transactions,45(5),1577-1585.
MLA	J. R. Liu,et al."Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy".Materials Transactions 45.5(2004):1577-1585.