Superplasticity of a directionally solidified NiAl-Fe(Nb) alloy at high temperature

IMR OpenIR

	Superplasticity of a directionally solidified NiAl-Fe(Nb) alloy at high temperature
	Y. H. Qi; J. T. Guo; C. Y. Cui; G. S. Li
	2002
发表期刊	Materials Letters
ISSN	0167-577X
卷号	57 期号:3 页码:552-557
摘要	The superplastic behavior of a directionally solidified (DS) Ni-20Al-27Fe-3Nb intermetallic alloy, which consists of dendritic beta-NiAl phase and interdendritic gamma/-gamma' phase, has been investigated. This alloy exhibits superplastic deformation behavior at 950-1100degreesC over an initial strain rate range of 5.2 x 10 (- 4)-1.04 x 10 (2) s (- 1), with the strain rate sensitivity index m = 0.21-0.45. The maximum elongation of 260% with m=0.29 was obtained at 1050 degreesC and an initial strain rate of 5.2 x 10 (- 3) s (- 1). Transmission electron microscopy (TEM) observations indicate that the mechanism of superplastic deformation is the high resistance against strain softening accommodated by the dislocation sliding and dynamic recrystallization. (C) 2002 Elsevier Science B.V. All rights reserved.
部门归属	chinese acad sci, inst met res, dept superalloys, shenyang 110016, peoples r china. liaoning inst technol, dept mat engn, jinzhou 121001, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, dept superalloys, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Intermetallic Directional Solidification Superplasticity In-situ Composites Deformation-behavior Constituent Phases Fe Systems
URL	查看原文
WOS记录号	WOS:000179422200005
引用统计	被引频次：7[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/321006/36389
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. H. Qi,J. T. Guo,C. Y. Cui,et al. Superplasticity of a directionally solidified NiAl-Fe(Nb) alloy at high temperature[J]. Materials Letters,2002,57(3):552-557.
APA	Y. H. Qi,J. T. Guo,C. Y. Cui,&G. S. Li.(2002).Superplasticity of a directionally solidified NiAl-Fe(Nb) alloy at high temperature.Materials Letters,57(3),552-557.
MLA	Y. H. Qi,et al."Superplasticity of a directionally solidified NiAl-Fe(Nb) alloy at high temperature".Materials Letters 57.3(2002):552-557.