| High-temperature low-cycle fatigue behavior of K40S cobalt-base superalloy | |
| Yang, FM; Sun, XF; Guan, HR; Hu, ZQ | |
| Corresponding Author | Yang, FM() |
| 2003-04-01 | |
| Source Publication | METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
 |
| ISSN | 1073-5623 |
| Volume | 34AIssue:4Pages:979-986 |
| Abstract | 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. |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000181884600008 |
| Publisher | MINERALS METALS MATERIALS SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/117483 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, FM |
| Affiliation | Chinese 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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