High-temperature fatigue property of Ti46Al8Nb alloy with the fully lamellar microstructure

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	High-temperature fatigue property of Ti46Al8Nb alloy with the fully lamellar microstructure
	Y. Zhou; J. Q. Wang; B. Zhang; W. Ke; E. H. Han
	2012
发表期刊	Intermetallics
ISSN	0966-9795
卷号	24 页码:41469
摘要	The high-cycle fatigue behavior of Ti46Al8Nb cast alloy with fully lamellar microstructure has been studied at room temperature, 400 degrees C, 600 degrees C and 750 degrees C. The result shows that temperature has great influence on the fatigue strength of Ti46Al8Nb alloy. Compared with that at room temperature, fatigue strength is significantly reduced at 400 C. However, at 600 degrees C the fatigue strength is slightly improved. A further increasing of temperature up to 750 degrees C gives rise to larger scatter of fatigue life and produces a more flat S-N (stress amplitude versus number of cycles to failure) curve. Fractographic observations indicate that fatigue cracks initiate at the interior casting defects and the lamellar colonies near the surface. Mixed modes of delamination, translamellar fracture and stepwise fracture are observed on the fracture surfaces at all temperatures. (C) 2011 Elsevier Ltd. All rights reserved.
部门归属	[zhou, y.; wang, j. q.; zhang, b.; ke, w.; han, e. h.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;ke, w (reprint author), chinese acad sci, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, peoples r china.;kewei@imr.ac.cn
关键词	Titanium Aluminides Based On Tial Mechanical Properties At High Temperatures Fracture Modes Microstructure Automotive Uses Including Engines Gamma-titanium Aluminide Low-cycle Fatigue Tial Automotive Valves Mechanical-properties Thermal-stability Crack Propagation High Nb Fracture Behavior Intermetallics
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60532
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Zhou,J. Q. Wang,B. Zhang,et al. High-temperature fatigue property of Ti46Al8Nb alloy with the fully lamellar microstructure[J]. Intermetallics,2012,24:41469.
APA	Y. Zhou,J. Q. Wang,B. Zhang,W. Ke,&E. H. Han.(2012).High-temperature fatigue property of Ti46Al8Nb alloy with the fully lamellar microstructure.Intermetallics,24,41469.
MLA	Y. Zhou,et al."High-temperature fatigue property of Ti46Al8Nb alloy with the fully lamellar microstructure".Intermetallics 24(2012):41469.