High temperature creep deformation mechanisms of a hot corrosion-resistant nickel-based superalloy

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	High temperature creep deformation mechanisms of a hot corrosion-resistant nickel-based superalloy
	J. S. Huo; J. T. Gou; L. Z. Zhou; X. Z. Qin; G. S. Li
	2007
发表期刊	Journal of Materials Engineering and Performance
ISSN	1059-9495
卷号	16 期号:1 页码:55-62
摘要	Creep properties of the experimental superalloy were investigated in the temperature range 1073-1223 K and stress range 110-550 MPa. The observations of dislocation structures during different creep conditions reveal that in the high stress region, particle-shearing mechanisms including stacking fault formation and antiphase boundary creation are operative and in the low stress region, the dislocation climb mechanism is dominant. From the plot of minimum creep rate versus applied stress, a very low stress region with exponent n < 2, which is related to diffusional creep, is found. Based on the experimental results, a stress-temperature creep deformation mechanism map for the alloy is constructed. On the basis of particle hardening theories and various dislocation-creep theories, the dislocation-creep transitions in terms of internal stress are discussed and calculated threshold stresses of various creep deformation mechanisms indicates that the particle shearing is easier to operate than Orowan looping at high stresses, and general climb is easy to happen at low stresses.
部门归属	chinese acad sci, inst met res, dept superalloys, shenyang, peoples r china.;huo, js (reprint author), chinese acad sci, inst met res, dept superalloys, shenyang, peoples r china;jshou@imr.ac.cn
关键词	Creep Deformation Mechanism Tem Microstructure Threshold Stress Nickel-based Superalloy Single-crystals Dislocations Behavior Alloys Cmsx-4
URL	查看原文
WOS记录号	WOS:000244939300009
引用统计	被引频次：16[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/321006/33600
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. S. Huo,J. T. Gou,L. Z. Zhou,et al. High temperature creep deformation mechanisms of a hot corrosion-resistant nickel-based superalloy[J]. Journal of Materials Engineering and Performance,2007,16(1):55-62.
APA	J. S. Huo,J. T. Gou,L. Z. Zhou,X. Z. Qin,&G. S. Li.(2007).High temperature creep deformation mechanisms of a hot corrosion-resistant nickel-based superalloy.Journal of Materials Engineering and Performance,16(1),55-62.
MLA	J. S. Huo,et al."High temperature creep deformation mechanisms of a hot corrosion-resistant nickel-based superalloy".Journal of Materials Engineering and Performance 16.1(2007):55-62.