On the low cycle fatigue deformation of K40S cobalt-base superalloy at elevated temperature

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	On the low cycle fatigue deformation of K40S cobalt-base superalloy at elevated temperature
	F. M. Yang; X. F. Sun; H. R. Guan; Z. Q. Hu
	2003
发表期刊	Materials Letters
ISSN	0167-577X
卷号	57 期号:19 页码:2823-2828
摘要	Low cycle isothermal mechanical fatigue testing K40S cobalt-base superalloy was carried out at 700 and 900degreesC with total strain amplitude from +/-0.1 to +/-1.0 pct. Correlations between microscopic cyclic deformation and cycle stress response with various microstructural phenomena were enabled through scanning electron microscopy (SEM) and transmission electron microscopy (TEM), detailing the deformation substructure and carbide precipitation. The results show that K40S superalloy exhibited cyclic stress response of cyclic hardening at 700degreesC, and of initial hardening followed by softening at 900degreesC. In addition, at both temperatures, cyclic hardening during cycle deformation increased with increasing strain amplitude, while the fatigue lifetime decreased. The cyclic stress response behavior can be rationalized based on the mechanisms associated with dislocation-dislocation interactions, dislocation-precipitate (M23C6) interactions and interactions between solute atoms and dislocations. (C) 2002 Elsevier Science B.V. All rights reserved.
部门归属	chinese acad sci, dept superalloy, inst met res, shenyang 110016, peoples r china.;yang, fm (reprint author), chinese acad sci, dept superalloy, inst met res, no 72 wenhua rd, shenyang 110016, peoples r china
关键词	K40s Cobalt-base Alloy Isothermal Cyclic Deformation Cyclic Stress Response Room-temperature Behavior Alloy Mechanisms
URL	查看原文
WOS记录号	WOS:000183268500011
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36105
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	F. M. Yang,X. F. Sun,H. R. Guan,et al. On the low cycle fatigue deformation of K40S cobalt-base superalloy at elevated temperature[J]. Materials Letters,2003,57(19):2823-2828.
APA	F. M. Yang,X. F. Sun,H. R. Guan,&Z. Q. Hu.(2003).On the low cycle fatigue deformation of K40S cobalt-base superalloy at elevated temperature.Materials Letters,57(19),2823-2828.
MLA	F. M. Yang,et al."On the low cycle fatigue deformation of K40S cobalt-base superalloy at elevated temperature".Materials Letters 57.19(2003):2823-2828.