Role of Re and Co on microstructures and gamma ' coarsening in single crystal superalloys

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	Role of Re and Co on microstructures and gamma ' coarsening in single crystal superalloys
	W. Z. Wang; T. Jin; J. L. Liu; X. F. Sun; H. R. Guan; Z. Q. Hu
	2008
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	479 期号:1-2 页码:148-156
摘要	Seven alloys containing different contents of rhenium and cobalt are investigated to explore systematically the effects of rhenium and cobalt on microstructures and gamma' coarsening. The alloys are exposed to different periods at 950 degrees C and 1050 degrees C. In the alloys containing rhenium, gamma' coarsening is controlled by diffusion. Diffusion coefficient rises with the decreasing of rhenium and the increasing of cobalt. In the alloys containing 4 wt.% Re and Co free, there is TCP phase precipitation when exposed at 1050 degrees C. Additions of 3 wt.% Co to the alloy suppress the formation of TCP phase completely. Co reduces or eliminates the adverse effects of Re. In the Re-free alloys, there is no TCP formation and the coarsening mechanisms are complex. The competition in rate-controlling between diffusion and interface reaction on coarsening kinetics is dependent on the elements and the diffusion behavior. A model describing the process of forming rafts is also established. (c) 2007 Elsevier B.V. All rights reserved.
部门归属	[wang, w. z.; jin, t.; liu, j. l.; sun, x. f.; guan, h. r.; hu, z. q.] chinese acad sci, inst met res, dept superalloys, shenyang 110016, peoples r china.;jin, t (reprint author), chinese acad sci, inst met res, dept superalloys, 72 wenhua rd, shenyang 110016, peoples r china;tjin@imr.ac.cn
关键词	Rhenium Cobalt Gamma' Coarsening Tcp Phase Single Crystal Superalloy Base Super-alloy Cobalt Additions Mar-m247 Tantalum Tungsten Phase
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WOS记录号	WOS:000255256300018
引用统计	被引频次：93[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/321006/33152
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Z. Wang,T. Jin,J. L. Liu,et al. Role of Re and Co on microstructures and gamma ' coarsening in single crystal superalloys[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,479(1-2):148-156.
APA	W. Z. Wang,T. Jin,J. L. Liu,X. F. Sun,H. R. Guan,&Z. Q. Hu.(2008).Role of Re and Co on microstructures and gamma ' coarsening in single crystal superalloys.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,479(1-2),148-156.
MLA	W. Z. Wang,et al."Role of Re and Co on microstructures and gamma ' coarsening in single crystal superalloys".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 479.1-2(2008):148-156.