Dendrite growth characteristics of the gamma '-precipitates in a single-crystal Ni-based superalloy

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	Dendrite growth characteristics of the gamma '-precipitates in a single-crystal Ni-based superalloy
	Zhang, JH ; Wu, X ; Xu, YB ; Hu, ZQ
通讯作者	Zhang, JH()
	2002
发表期刊	DEFECTS AND DIFFUSION IN METALS: AN ANNUAL RETROSPECTIVE IV
卷号	203-2 页码:193-208
摘要	An investigation has been made into the nucleation and growth characteristics of the dendritic gamma'-precipitates in a single crystal nickel-base superalloy which is directly aged after homogenizing and solutioning at high temperature. The results show that the temperature for gamma'-precipitation is sensitive to the alloy composition in a local area. The relationship between the nucleation density (1) and undercooling(DeltaT(gamma),) for the dendritic gamma'-precipitation has been found to be exponential which can be described in terms of a simulation equation: I = 2.5x 10(-3) exp(0.11 DeltaT(gamma)) The size of the gamma'-precipitates is proportional to the direct aging time under a small undercooling. The preferential growth direction of the dendritic gamma'-precipitates is <110> which is completely coherent with the gamma-matrix. The formation mechanism for the dendritic gamma'-precipitates has been proposed to involve both diffusion-and nondiffusion controls. It tends to form nucleii symmetrically.
关键词	dendrites gamma-prime nucleation mechanisms precipitates superalloy
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Condensed Matter
WOS记录号	WOS:000175228400013
出版者	SCITEC PUBLICATIONS LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/114273
专题	中国科学院金属研究所
通讯作者	Zhang, JH
作者单位	1.Chinese Acad Sci, Inst Met Res, State Key Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China 2.Wayne State Univ, Dept Mech Engn, Detroit, MI 48202 USA
推荐引用方式 GB/T 7714	Zhang, JH,Wu, X,Xu, YB,et al. Dendrite growth characteristics of the gamma '-precipitates in a single-crystal Ni-based superalloy[J]. DEFECTS AND DIFFUSION IN METALS: AN ANNUAL RETROSPECTIVE IV,2002,203-2:193-208.
APA	Zhang, JH,Wu, X,Xu, YB,&Hu, ZQ.(2002).Dendrite growth characteristics of the gamma '-precipitates in a single-crystal Ni-based superalloy.DEFECTS AND DIFFUSION IN METALS: AN ANNUAL RETROSPECTIVE IV,203-2,193-208.
MLA	Zhang, JH,et al."Dendrite growth characteristics of the gamma '-precipitates in a single-crystal Ni-based superalloy".DEFECTS AND DIFFUSION IN METALS: AN ANNUAL RETROSPECTIVE IV 203-2(2002):193-208.