Gamma prime coarsening in a nickel base single crystal superalloy

IMR OpenIR

	Gamma prime coarsening in a nickel base single crystal superalloy
	S. Tang; Z. Zheng; L. K. Ning
	2014
发表期刊	Materials Letters
ISSN	0167-577X
卷号	128 页码:388-391
摘要	The gamma' morphological evolution and coarsening kinetics have been investigated in a nickel base single crystal superalloy during thermal exposure at 900 degrees C. The gamma' precipitates coarsen both in the dendrite arms (DAs) and the interdendritic regions (IRs) with the exposure time. However, an anomalous coarsening behavior has been found, i.e., the average particle size in the DAs is always larger than that in the IRs after exposure for 100 h. The cube rate law gives a much better fit for the IRs than for the DAs owing to apparent coalescence phenomenon in the DAs compared to that in the IRs. The particle size distribution (PSD) results indicate that obvious coalescence in the DAs may be partially attributed to the initial size inhomogeneity while gamma' particles always maintain cubic in the IRs during thermal exposure. (C) 2014 Elsevier B.V. All rights reserved.
部门归属	[tang, s. ; ning, l. k.] univ chinese acad sci, beijing 100049, peoples r china. [tang, s. ; zheng, z. ; ning, l. k.] chinese acad sci, inst met res, dept superalloy, shenyang 110016, peoples r china. ; tang, s (reprint author), univ chinese acad sci, beijing 100049, peoples r china. ; tangsut08@gmail.com
关键词	Single Crystal Superalloy Coarsening The Dendrite Arms The Interdendritic Regions Particle Size Distribution Kinetics
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73385
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Tang,Z. Zheng,L. K. Ning. Gamma prime coarsening in a nickel base single crystal superalloy[J]. Materials Letters,2014,128:388-391.
APA	S. Tang,Z. Zheng,&L. K. Ning.(2014).Gamma prime coarsening in a nickel base single crystal superalloy.Materials Letters,128,388-391.
MLA	S. Tang,et al."Gamma prime coarsening in a nickel base single crystal superalloy".Materials Letters 128(2014):388-391.