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High-temperature low-cycle fatigue behavior of K40S cobalt-base superalloy
Yang, FM; Sun, XF; Guan, HR; Hu, ZQ
Corresponding AuthorYang, FM()
2003-04-01
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume34AIssue:4Pages:979-986
AbstractAn 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.
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000181884600008
PublisherMINERALS METALS MATERIALS SOC
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/117483
Collection中国科学院金属研究所
Corresponding AuthorYang, FM
AffiliationChinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
Recommended Citation
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.
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