| Low cycle fatigue behavior of K40S cobaltbase superalloy at elevated temperature - I. Fatigue properties | |
| Yang, FM; Sun, XF; Guan, HR; Hu, ZQ | |
| Corresponding Author | Yang, FM() |
| 2002-10-01 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 38Issue:10Pages:1047-1052 |
| Abstract | 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. |
| Keyword | cobalt-base superalloy high temperature low cycle fatigue dislocation |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000179227700008 |
| Publisher | SCIENCE CHINA PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/115598 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, FM |
| Affiliation | Chinese 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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