Low cycle fatigue behavior of K40S cobalt-base superalloy at elevated temperature - II. Fatigue fractography

IMR OpenIR

	Low cycle fatigue behavior of K40S cobalt-base superalloy at elevated temperature - II. Fatigue fractography
	Yang, FM; Sun, XF; Guan, HR; Hu, ZQ
通讯作者	Yang, FM()
	2002-10-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	38 期号:10 页码:1053-1056
摘要	High temperature low cycle fatigue fracture behavior of K40S cobalt-base superalloy at 700 degreesC and 900 degreesC in ambient atmosphere has been investigated under fully reversed total strain-controlled mode. The results show that the fatigue crack initiation is frequently associated with the slip bands and the carbides at the specimen surfaces. The fatigue cracks initiate and propagate both in a transgranular manner for all the total strain amplitudes under consideration. Both the transgranular crack initiation and propagation are accelerated by high temperature oxidation. The well-distributed carbide particles are the second crack initiation sites. The second crack initiation relaxes the stress concentration at the crack tip, reducing the driving force of crack propagation. High temperature low cycle fatigue failure of K40S alloy results from the interaction of the mechanical fatigue and environmental oxidation.
关键词	cobalt-base superalloy crack initiation crack propagation environmental oxidation
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:000179227700009
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/321006/114926
专题	中国科学院金属研究所
通讯作者	Yang, FM
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, FM,Sun, XF,Guan, HR,et al. Low cycle fatigue behavior of K40S cobalt-base superalloy at elevated temperature - II. Fatigue fractography[J]. ACTA METALLURGICA SINICA,2002,38(10):1053-1056.
APA	Yang, FM,Sun, XF,Guan, HR,&Hu, ZQ.(2002).Low cycle fatigue behavior of K40S cobalt-base superalloy at elevated temperature - II. Fatigue fractography.ACTA METALLURGICA SINICA,38(10),1053-1056.
MLA	Yang, FM,et al."Low cycle fatigue behavior of K40S cobalt-base superalloy at elevated temperature - II. Fatigue fractography".ACTA METALLURGICA SINICA 38.10(2002):1053-1056.