Microstructure and elevated temperature mechanical behavior of cast NiAl-Cr(Mo) alloyed with Hf

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	Microstructure and elevated temperature mechanical behavior of cast NiAl-Cr(Mo) alloyed with Hf
	J. T. Guo; C. Y. Cui; Y. H. Qi; H. Q. Ye
	2002
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	343 期号:1-2 页码:142-150
摘要	An NiAl-Cr(Mo) alloy modified with Hf was fabricated by vacuum induction, melted and drop cast and then was hot isostatically pressed (HIPed) at 1523 K, 200 MPa for 4.5 h. The alloy was mainly composed of NiAl matrix, Cr(Mo) and Hf-rich phase distributed on the NiAl and Cr(Mo) phase boundary. The NiAl-Cr(Mo) and NiAl-Ni2AlHf interfaces were also investigated. Its elevated temperature compressive behavior was studied and the deformation features of the alloy could be adequately described by standard power-law which is usually used to characterize creep behavior for various metallic materials. The stress exponent n as well as the activation energy Q was calculated by fitting the experimental data to the power-law and temperature-compensated power-law equation. The possible strengthening mechanism was also discussed. Because the alloy had relatively high tensile strength, the tensile creep was performed at 1373 K and, as concluded from the stress component of different testing methods, the creep behavior may not be influenced by the testing method. (C) 2002 Published by Elsevier Science B.V.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Deformation Nial-28cr-5mo-1hf Hot Isostatic Press Creep In-situ Composites Compressive Properties Creep-behavior Nial-cr Deformation Transition Strength Ni2alti 1200-k 1300-k
URL	查看原文
WOS记录号	WOS:000178067500021
引用统计	被引频次：21[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/321006/36275
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. T. Guo,C. Y. Cui,Y. H. Qi,et al. Microstructure and elevated temperature mechanical behavior of cast NiAl-Cr(Mo) alloyed with Hf[J]. Journal of Alloys and Compounds,2002,343(1-2):142-150.
APA	J. T. Guo,C. Y. Cui,Y. H. Qi,&H. Q. Ye.(2002).Microstructure and elevated temperature mechanical behavior of cast NiAl-Cr(Mo) alloyed with Hf.Journal of Alloys and Compounds,343(1-2),142-150.
MLA	J. T. Guo,et al."Microstructure and elevated temperature mechanical behavior of cast NiAl-Cr(Mo) alloyed with Hf".Journal of Alloys and Compounds 343.1-2(2002):142-150.