Low cycle fatigue behavior of K40S cobaltbase superalloy at elevated temperature - I. Fatigue properties

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	Low cycle fatigue behavior of K40S cobaltbase superalloy at elevated temperature - I. Fatigue properties
	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:1047-1052
摘要	Isothermal cyclic deformation tests were conducted on K40S cobalt-base superalloy with total strain amplitude from +/-0.1% to +/-1.0% at 700 degreesC and 900 degreesC. Correlations between microscopic cyclic deformation and cycle stress response with various microstructural phenomena were established through scanning electron microscopy (SEM) and transmission electron microscopy (TEM), detailing the deformation substructure and carbide precipitation. The results show that K40S alloy possesses high low cycle fatigue resistance in comparison with X-40 alloy. K40S superalloy exhibits cyclic stress response of cyclic hardening at 700 degreesC, and of initial hardening followed by softening at 900 degreesC. In addition, at both temperatures, cyclic hardening during cycle deformation increases with increasing strain amplitude, while the fatigue lifetime decreases. The cyclic stress response behavior can be rationalized based on the mechanisms associated with dislocation-dislocation interactions, dislocation-precipitate (M23C6) interactions and interactions between the solute atoms and the dislocations.
关键词	cobalt-base superalloy high temperature low cycle fatigue dislocation
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:000179227700008
出版者	SCIENCE CHINA PRESS
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/321006/115598
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 cobaltbase superalloy at elevated temperature - I. Fatigue properties[J]. ACTA METALLURGICA SINICA,2002,38(10):1047-1052.
APA	Yang, FM,Sun, XF,Guan, HR,&Hu, ZQ.(2002).Low cycle fatigue behavior of K40S cobaltbase superalloy at elevated temperature - I. Fatigue properties.ACTA METALLURGICA SINICA,38(10),1047-1052.
MLA	Yang, FM,et al."Low cycle fatigue behavior of K40S cobaltbase superalloy at elevated temperature - I. Fatigue properties".ACTA METALLURGICA SINICA 38.10(2002):1047-1052.