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
刊名	Journal of Alloys and Compounds
	2002
卷号	343 期号:1-2 页码:142-150
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
ISSN号	0925-8388
中文摘要	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.
原文出处	://WOS:000178067500021
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/36275]
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	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.