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

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	Effect of aging on fatigue-crack growth behavior of a high-temperature titanium alloy
	J. R. Liu; S. X. Li; D. Li; R. Yang
	2004
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.
部门归属	chinese acad sci, inst met res, titanium alloy lab, shenyang 110016, peoples r china. chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;liu, jr (reprint author), chinese acad sci, inst met res, titanium alloy lab, 72 wenhua rd, shenyang 110016, peoples r china
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
URL	查看原文
WOS记录号	WOS:000221863900034
引用统计	被引频次：6[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/321006/35461
专题	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.