Influence of local chemical segregation on the gamma ' directional coarsening behavior in single crystal superalloy CMSX-4

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	Influence of local chemical segregation on the gamma ' directional coarsening behavior in single crystal superalloy CMSX-4
	K. Y. Cheng ; C. Y. Job ; D. H. Kim ; T. Jin ; Z. Q. Hu
刊名	Materials Characterization
	2009
卷号	60 期号:3 页码:210-218
关键词	Nickel-base single crystal superalloy Thermal exposure gamma ' directional coarsening nickel-base superalloy temperature creep-properties precipitate morphology microstructure compression parameters interfaces apparent kinetics alloy
ISSN号	1044-5803
中文摘要	The influence of local chemical segregation on the directional coarsening behavior of gamma' phase has been investigated in a nickel-base single crystal superalloy during load-free thermal exposure. it is found that the gamma' phase was preferentially oriented with the direction perpendicular to the dendrite arm growth axis. The chemical gradients caused by local chemical heterogeneities were carefully measured on the scale of a dendrite. It showed that the directions of the gamma' rafting and the chemical gradients are consistent and the magnitude of the chemical gradients affects the rafting rates to some extent. it is suggested that the internal chemical gradients can orientate the development of the gamma' rafts by leading to anisotropy in their growth kinetics during Ostwald ripening. Further-more, influence of the local chemical segregation on the mechanical properties is also discussed. Crown Copyright (C) 2008 Published by Elsevier Inc. All rights reserved.
原文出处	://WOS:000264252800008
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/31849]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	K. Y. Cheng,C. Y. Job,D. H. Kim,et al. Influence of local chemical segregation on the gamma ' directional coarsening behavior in single crystal superalloy CMSX-4[J]. Materials Characterization,2009,60(3):210-218.
APA	K. Y. Cheng,C. Y. Job,D. H. Kim,T. Jin,&Z. Q. Hu.(2009).Influence of local chemical segregation on the gamma ' directional coarsening behavior in single crystal superalloy CMSX-4.Materials Characterization,60(3),210-218.
MLA	K. Y. Cheng,et al."Influence of local chemical segregation on the gamma ' directional coarsening behavior in single crystal superalloy CMSX-4".Materials Characterization 60.3(2009):210-218.