Brittle-to-ductile transition of a multiphase intermetallic alloy based on NiAl

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	Brittle-to-ductile transition of a multiphase intermetallic alloy based on NiAl
	R. S. Chen; J. T. Guo; W. L. Zhou; J. Y. Zhou
	2000
发表期刊	Intermetallics
ISSN	0966-9795
卷号	8 期号:5-6 页码:663-667
摘要	The microstructure and mechanical behaviors of a multiphase beta + gamma + gamma' + alpha-Cr Ni-Al-Cr alloy have been investigated. This alloy exhibits only 1% tensile ductility despite the presence of the continuous ductile phases. It is noted that both fractograph and BDTT are typically dependent on strain rate, with a two orders of magnitude increase in strain rate resulting in approximately a 150 K increase in BDTT. An asymmetry between the compressive and tensile yield strength was also observed at low temperature. SEM observation of the side surface of the fractured specimen indicated that the phase boundary seemed to be weaker than the fracture strength of the constituent phases at temperature below the BDTT; the random orientation relationship between the beta phase and the gamma/gamma' phases may result in difficulty in strain transfer from soft phase to hard phase, which, in turn, contributes to crack initiation at phase boundary. (C) 2000 Elsevier Science Ltd. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang 110015, peoples r china. dalian univ technol, dept mat engn, dalian 116023, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110015, peoples r china
关键词	Multiphase Intermetallics Nickel Aluminides Based On Nial Ternary Alloy Systems Brittleness And Ductility Microstructure Mechanical-properties Tensile Properties Microstructure Deformation Temperature Fracture Behavior Phase
URL	查看原文
WOS记录号	WOS:000087393800036
引用统计	被引频次：20[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/321006/36998
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. S. Chen,J. T. Guo,W. L. Zhou,et al. Brittle-to-ductile transition of a multiphase intermetallic alloy based on NiAl[J]. Intermetallics,2000,8(5-6):663-667.
APA	R. S. Chen,J. T. Guo,W. L. Zhou,&J. Y. Zhou.(2000).Brittle-to-ductile transition of a multiphase intermetallic alloy based on NiAl.Intermetallics,8(5-6),663-667.
MLA	R. S. Chen,et al."Brittle-to-ductile transition of a multiphase intermetallic alloy based on NiAl".Intermetallics 8.5-6(2000):663-667.