Microstructure, brittle-ductile transition temperature and elevated temperature compressive behavior of the directionally solidified NiAl-Cr(Mo)-Hf alloy

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	Microstructure, brittle-ductile transition temperature and elevated temperature compressive behavior of the directionally solidified NiAl-Cr(Mo)-Hf alloy
	C. Y. Cui; J. T. Guo; H. Q. Ye
	2004
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	385 期号:1-2 页码:359-366
摘要	The directionally solidified NiAl-27Cr-5.6Mo-0.4Hf (at.%) alloy was hot isostatically pressed at 1573 K, 100MPa for 2h and then annealed at 1323 K for 40 h. Microstructure examination revealed that the present alloy was mainly composed of three phases, i.e. the NiAl matrix, the lamellar Cr(Mo) and Heusler phase (Ni2AlHf). The interfaces between the NiAl-Cr(Mo), the NiAl-Ni2AlHf were atomically flat. The mechanical properties including the brittle-ductile transition temperature and the high temperature compressive behavior were also tested. The BDTT of the alloy was about 1233 K at a strain rate of 1.04 x 10(-4) s(-1) and dependent on strain rate. This strain-rate dependent BDT can be explained by the cooperative dislocation generation model. The investigation on the high temperature compressive behavior between 1200 and 1300 K showed that the deformation behaviors of the alloy could be adequately described by the standard power-law. The possible strengthening mechanism was discussed. (C) 2004 Elsevier B.V. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china.;cui, cy (reprint author), natl inst mat sci, tsukuba, ibaraki 3050047, japan;cui.chuanyong@nims.go.jp
关键词	Microstructure Ni2alhf Phase Bdtt Deformation Behavior Mechanical-properties Deformation-behavior Nial/cr(Mo) Alloy Nial-cr Creep Toughness Crystals Strength Hf
URL	查看原文
WOS记录号	WOS:000224822000045
引用统计	被引频次：8[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/321006/35334
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Y. Cui,J. T. Guo,H. Q. Ye. Microstructure, brittle-ductile transition temperature and elevated temperature compressive behavior of the directionally solidified NiAl-Cr(Mo)-Hf alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2004,385(1-2):359-366.
APA	C. Y. Cui,J. T. Guo,&H. Q. Ye.(2004).Microstructure, brittle-ductile transition temperature and elevated temperature compressive behavior of the directionally solidified NiAl-Cr(Mo)-Hf alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,385(1-2),359-366.
MLA	C. Y. Cui,et al."Microstructure, brittle-ductile transition temperature and elevated temperature compressive behavior of the directionally solidified NiAl-Cr(Mo)-Hf alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 385.1-2(2004):359-366.