Microstructure and Elevated Temperature Tensile Behavior of Directionally Solidified Ni-rich NiAl-Mo(Hf) Alloy

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	Microstructure and Elevated Temperature Tensile Behavior of Directionally Solidified Ni-rich NiAl-Mo(Hf) Alloy
	P. Han; Y. H. Qi; J. T. Guo
	2011
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	27 期号:5 页码:437-442
摘要	The microstructure, high strain rate superplasticity and tensile creep behavior of directionally solidified (DS) NiAl-Mo(Hf) alloy have been investigated. The alloy exhibits dendritic structure, where dendritic arm is NiAl phase, interdendritic region is Ni(3)Al phase, and Mo-rich phase distributes in the NiAl and Ni(3)Al phases. The alloy exhibits high strain rate superplastic deformation behavior, and the maximum elongation is 104.2% at 1373 K and strain rate of 1.04x10(-2) s(-1). The balance between strain hardening (by dislocation glide) and strain softening (by dynamic recovery and recrystallization) is responsible for the superplastic deformation. All the creep curves of the DS NiAl-Mo(Hf) alloy have similar shape of a short primary creep and dominant steady creep stages, and the creep strain is great. The possible creep deformation mechanism was also discussed. The creep fracture data follow the Monkman-Grant relationship.
部门归属	[han, ping] bohai univ, dept phys, jinzhou 121013, peoples r china. [qi, yihui; guo, jianting] chinese acad sci, inst met res, shenyang 110016, peoples r china.;han, p (reprint author), bohai univ, dept phys, jinzhou 121013, peoples r china;hanpingbetty@yahoo.com.cn
关键词	Nial Alloy Directional Solidification Superplasticity Creep Multiphase Intermetallic Alloy Mechanical-properties Fracture-behavior Creep-behavior Superplasticity Compound
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WOS记录号	WOS:000291514600010
引用统计	被引频次：13[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/321006/30373
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Han,Y. H. Qi,J. T. Guo. Microstructure and Elevated Temperature Tensile Behavior of Directionally Solidified Ni-rich NiAl-Mo(Hf) Alloy[J]. Journal of Materials Science & Technology,2011,27(5):437-442.
APA	P. Han,Y. H. Qi,&J. T. Guo.(2011).Microstructure and Elevated Temperature Tensile Behavior of Directionally Solidified Ni-rich NiAl-Mo(Hf) Alloy.Journal of Materials Science & Technology,27(5),437-442.
MLA	P. Han,et al."Microstructure and Elevated Temperature Tensile Behavior of Directionally Solidified Ni-rich NiAl-Mo(Hf) Alloy".Journal of Materials Science & Technology 27.5(2011):437-442.