Fatigue crack propagation behavior of K40S cobalt-base superalloy at elevated temperature

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	Fatigue crack propagation behavior of K40S cobalt-base superalloy at elevated temperature
	F. M. Yang; X. F. Sun; H. R. Guan; W. L. Deng; F. Liu; Z. Q. Hu
	2003
Source Publication	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
Volume	13 Issue:1 Pages:50-54
Abstract	Fatigue crack propagation behavior of K40S cobalt-base superalloy under ambient atmosphere at 700 degreesC and 900 degreesC was investigated. The detailed fatigue crack propagation and fracture mechanism under the alternating loads were studied. The results show that, there is a defined threshold for K40S alloy at elevated temperatures. The fatigue threshold is 23. 9 MPa . m(1/2) at 700 degreesC and 12 MPa . m(1/2) at 900 V. The significant decrease of the threshold with increasing temperature is associated with the oxidation induced embrittlement at crack tip. Observation on the fatigue fracture surfaces indicates a ductile fracture mechanism related to the fatigue crack growth.
description.department	chinese acad sci, inst met res, shenyang 110016, peoples r china. shenyang aeroengine res inst, shenyang 110034, peoples r china.
Keyword	Cobalt-base Superalloy Fatigue Crack Propagation Fatigue Threshold Ductility Growth-behavior Alloy Steel
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WOS ID	WOS:000181242400012
Citation statistics
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/36104
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	F. M. Yang,X. F. Sun,H. R. Guan,et al. Fatigue crack propagation behavior of K40S cobalt-base superalloy at elevated temperature[J]. Transactions of Nonferrous Metals Society of China,2003,13(1):50-54.
APA	F. M. Yang,X. F. Sun,H. R. Guan,W. L. Deng,F. Liu,&Z. Q. Hu.(2003).Fatigue crack propagation behavior of K40S cobalt-base superalloy at elevated temperature.Transactions of Nonferrous Metals Society of China,13(1),50-54.
MLA	F. M. Yang,et al."Fatigue crack propagation behavior of K40S cobalt-base superalloy at elevated temperature".Transactions of Nonferrous Metals Society of China 13.1(2003):50-54.

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