Creep rupture Behavior of K40S alloy at elevated temperatures

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	Creep rupture Behavior of K40S alloy at elevated temperatures
	F. M. Yang; X. F. Sun; H. R. Guan; Z. Q. Hu
	2004
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	20 期号:2 页码:175-179
摘要	Creep testing was conducted on K40S alloy. The detailed creep deformation and fracture mechanisms under constant load were studied. The results show that the stress exponent ranges between 7 and 14.4 at elevated temperature 973similar to1173 K, and that the activation energy is approximately 449.1 kJ/mol. During creep, the grain boundary sliding cut off primary carbides at the boundary, generating the "O" model cracks. The creep failure mode of K40S alloy is transgranular ductile and cracks originate at the primary carbides. A long carbide and matrix interface is often a preferential path for crack propagation. The creep mechanism is discussed in light of the creep microstructure, the stress exponent and the activation energy.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china.;yang, fm (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;fuminyang@sohu.com
关键词	K40s Alloy Creep Fracture Crack Propagation Activation-energies Superalloy Term
URL	查看原文
WOS记录号	WOS:000220705300013
引用统计	被引频次：1[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/321006/35663
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. Creep rupture Behavior of K40S alloy at elevated temperatures[J]. Journal of Materials Science & Technology,2004,20(2):175-179.
APA	F. M. Yang,X. F. Sun,H. R. Guan,&Z. Q. Hu.(2004).Creep rupture Behavior of K40S alloy at elevated temperatures.Journal of Materials Science & Technology,20(2),175-179.
MLA	F. M. Yang,et al."Creep rupture Behavior of K40S alloy at elevated temperatures".Journal of Materials Science & Technology 20.2(2004):175-179.