| Dendrite growth characteristics of the gamma '-precipitates in a single-crystal Ni-based superalloy | |
| Zhang, JH; Wu, X; Xu, YB; Hu, ZQ | |
| Corresponding Author | Zhang, JH() |
| 2002 | |
| Source Publication | DEFECTS AND DIFFUSION IN METALS: AN ANNUAL RETROSPECTIVE IV
 |
| Volume | 203-2Pages:193-208 |
| Abstract | 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. |
| Keyword | dendrites gamma-prime nucleation mechanisms precipitates superalloy |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Physics, Condensed Matter |
| WOS ID | WOS:000175228400013 |
| Publisher | SCITEC PUBLICATIONS LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/114273 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, JH |
| Affiliation | 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 |
| Recommended Citation 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. |
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