Microstructures of a single-crystal nickel-base superalloy after thermo-mechanical fatigue

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	Microstructures of a single-crystal nickel-base superalloy after thermo-mechanical fatigue
	Y. C. Wang; S. X. Li; L. Zhou; S. H. Ai; F. Liu; H. Zhang; Z. G. Wang
	2004
发表期刊	Philosophical Magazine
ISSN	1478-6443
卷号	84 期号:31 页码:3335-3351
摘要	The microstructures of a single-crystal nickel-base superalloy were observed by transmission electron microscopy (TEM) before and after thermo-mechanical fatigue. Both dislocation configurations and gamma' precipitate morphologies under in-phase (IP) testing were found to be clearly different from those under out-of-phase (OP) testing. Under IP testing, dense hexagonal dislocation networks were found on the horizontal interfaces, and irregular dislocation networks on the vertical interfaces. With decreasing mechanical strain amplitude, rafting of gamma' precipitates was more pronounced. Under OP testing, no dislocation networks were found on the gamma/gamma' interfaces; also, gamma' precipitates were sheared by superlattice stacking faults, and were not clearly rafted. The characteristic dislocation networks and partials of the stacking fault are analysed and the rafting mechanism of the gamma' precipitates is discussed.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;li, sx (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;shxli@imr.ac.cn
关键词	Finite-element-analysis Ni-based Superalloys Dislocation Networks Matrix Dislocations Creep Temperature Mechanism Alloy Dd8
URL	查看原文
WOS记录号	WOS:000224898400003
引用统计	被引频次：4[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/321006/35597
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. C. Wang,S. X. Li,L. Zhou,et al. Microstructures of a single-crystal nickel-base superalloy after thermo-mechanical fatigue[J]. Philosophical Magazine,2004,84(31):3335-3351.
APA	Y. C. Wang.,S. X. Li.,L. Zhou.,S. H. Ai.,F. Liu.,...&Z. G. Wang.(2004).Microstructures of a single-crystal nickel-base superalloy after thermo-mechanical fatigue.Philosophical Magazine,84(31),3335-3351.
MLA	Y. C. Wang,et al."Microstructures of a single-crystal nickel-base superalloy after thermo-mechanical fatigue".Philosophical Magazine 84.31(2004):3335-3351.