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Low cycle fatigue behavior of K40S cobalt-base superalloy at elevated temperature - II. Fatigue fractography
Yang, FM; Sun, XF; Guan, HR; Hu, ZQ
Corresponding AuthorYang, FM()
2002-10-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume38Issue:10Pages:1053-1056
AbstractHigh 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.
Keywordcobalt-base superalloy crack initiation crack propagation environmental oxidation
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000179227700009
PublisherSCIENCE CHINA PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/114926
Collection中国科学院金属研究所
Corresponding AuthorYang, FM
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
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.
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