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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
Corresponding AuthorYang, FM()
2002-10-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume38Issue:10Pages:1047-1052
AbstractIsothermal 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.
Keywordcobalt-base superalloy high temperature low cycle fatigue dislocation
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000179227700008
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/115598
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 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.
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