Precipitations in an yttrium-containing low-expansion superalloy

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	Precipitations in an yttrium-containing low-expansion superalloy
	R. M. Wang ; Y. F. Han ; C. Z. Li ; S. W. Zhang ; D. H. Ping ; M. G. Yan
刊名	Journal of Materials Science
	1998
卷号	33 期号:20 页码:5069-5077
关键词	alloy
ISSN号	0022-2461
中文摘要	The resistance to stress-accelerated grain-boundary oxygen embrittlement and notch-bar rupture strength in Fe-Ni-Co-Nb-Ti low-expansion superalloy has been improved significantly by trace yttrium addition. The precipitates in the matrix as well as along the grain boundaries have been studied systematically. The platelet precipitates in the matrix and along the grain boundaries have a hexagonal crystal structure (space group, P6/mmm) with lattice parameters a = 0.498 nm and c = 0.408 nm. The crystallographic orientation relationship between the phase and the matrix is found to be ((1) over bar (1) over bar 1)(gamma) //(0 0 0 1)(H), [(1) over bar 1 0](gamma)//[1 1 (2) over bar 0](H). The semi-continuous discrete precipitates along the grain boundaries have an orthorhombic crystal structure with lattice parameters a = 0.45 nm, b = 0.80 nm and c = 1.20 nm. High-resolution images show that the interface between the precipitates and the matrix is semicoherent. (C) 1998 Kluwer Academic Publishers.
原文出处	://WOS:000078833800026
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/37808]
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	R. M. Wang,Y. F. Han,C. Z. Li,et al. Precipitations in an yttrium-containing low-expansion superalloy[J]. Journal of Materials Science,1998,33(20):5069-5077.
APA	R. M. Wang,Y. F. Han,C. Z. Li,S. W. Zhang,D. H. Ping,&M. G. Yan.(1998).Precipitations in an yttrium-containing low-expansion superalloy.Journal of Materials Science,33(20),5069-5077.
MLA	R. M. Wang,et al."Precipitations in an yttrium-containing low-expansion superalloy".Journal of Materials Science 33.20(1998):5069-5077.