Effects of thermal exposure on the tensile and fatigue properties of cast Ti-47Al-2Cr-2Nb-0.15B alloy

IMR OpenIR

	Effects of thermal exposure on the tensile and fatigue properties of cast Ti-47Al-2Cr-2Nb-0.15B alloy
	Cui, YY; Xiang, HF; Jia, Q; Yang, R
通讯作者	Cui, YY(yycui@imr.ac.cn)
	2005
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	41 期号:1 页码:108-112
摘要	The elevated temperature fatigue strength and room temperature tensile properties and fatigue strength of cast Ti-47Al-2Cr-2Nb-0.15B (atomic fraction, %) alloy after thermal exposure were investigated. The microstructural change of the bulk alloy and the microstructure of surface layer after 650 degreesC/100 h and 800 degreesC/100 h exposures were analyzed by means of XRD and SEM. The room temperature tensile ductility and fatigue strength decreased slowly with increasing exposure temperature when it is below 650 degreesC, and then rapidly decreased above this temperature. Dependence of fatigue strength for the unexposed alloy with test temperature exhibits the same trend. The surface layer formed after 650 degreesC/100 h exposure is an oxygen-enriched layer, while that after 800 degreesC/100 h exposure is an oxide layer consisting of TiO2 and Al2O3. Such a change in the nature of the surface layer corresponds to the onset of rapid drop in mechanical proerties and fatigue strength of the alloy with increasing exposure temperature.
关键词	TiAl alloy thermal exposure room temperature ductility fatigue strength
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000227020500021
出版者	SCIENCE CHINA PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/83174
通讯作者	Cui, YY
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Cui, YY,Xiang, HF,Jia, Q,et al. Effects of thermal exposure on the tensile and fatigue properties of cast Ti-47Al-2Cr-2Nb-0.15B alloy[J]. ACTA METALLURGICA SINICA,2005,41(1):108-112.
APA	Cui, YY,Xiang, HF,Jia, Q,&Yang, R.(2005).Effects of thermal exposure on the tensile and fatigue properties of cast Ti-47Al-2Cr-2Nb-0.15B alloy.ACTA METALLURGICA SINICA,41(1),108-112.
MLA	Cui, YY,et al."Effects of thermal exposure on the tensile and fatigue properties of cast Ti-47Al-2Cr-2Nb-0.15B alloy".ACTA METALLURGICA SINICA 41.1(2005):108-112.