High-temperature low-cycle fatigue behavior of K40S cobalt-base superalloy

IMR OpenIR

	High-temperature low-cycle fatigue behavior of K40S cobalt-base superalloy
	Yang, FM; Sun, XF; Guan, HR; Hu, ZQ
通讯作者	Yang, FM()
	2003-04-01
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN	1073-5623
卷号	34A 期号:4 页码:979-986
摘要	An investigation was made on the strain-controlled low-cycle fatigue (LCF) of K40S cobalt-base superalloy at 900 degreesC in ambient atmosphere. The results show that K40S alloy possesses high LCF resistance in comparison with X-40 alloy. Under the testing conditions in this study, K40S alloy exhibits a cyclic stress response of initial hardening followed by softening. The cyclic stress response behavior has been attributed to dislocation-dislocation interactions and dislocation-precipitate interactions. The high response stress can lead to a large stress concentration at locations where inelastic strains of high amplitude accumulate, which account for the decreasing fatigue life with increasing strain rate. The well-distributed carbide particles are the "secondary" crack initiation sites. The secondary crack initiation relaxes the stress concentration at the crack tip, reducing the driving force of crack propagation. High-temperature LCF failure of K40S alloy results from the interaction of the mechanical fatigue and environmental oxidation.
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000181884600008
出版者	MINERALS METALS MATERIALS SOC
引用统计	被引频次：12[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/321006/117483
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, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, FM,Sun, XF,Guan, HR,et al. High-temperature low-cycle fatigue behavior of K40S cobalt-base superalloy[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2003,34A(4):979-986.
APA	Yang, FM,Sun, XF,Guan, HR,&Hu, ZQ.(2003).High-temperature low-cycle fatigue behavior of K40S cobalt-base superalloy.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,34A(4),979-986.
MLA	Yang, FM,et al."High-temperature low-cycle fatigue behavior of K40S cobalt-base superalloy".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 34A.4(2003):979-986.