Tensile behavior of NiAl-9Mo eutectic alloy around brittle to ductile transition temperature

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	Tensile behavior of NiAl-9Mo eutectic alloy around brittle to ductile transition temperature
	W. L. Ren; J. T. Guo; G. S. Li; J. Y. Zhou
	2003
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	19 期号:3 页码:253-256
摘要	The influence of strain rate and temperature on the tensile behavior of as-cast and HIPed NiAl-9Mo eutectic alloy was investigated in the temperature range of 700-950'C and over a strain rate range from 2.08 x 10(-4) s(-1) to 2.08x10(-2) s(-1). The results indicate that HIP process causes an enhancement in ductility and a decrease in ultimate tensile strength (UTS), yield strength (YS), average strain hardening rate as well as a drop in brittle to ductile transition temperature(BDTT) under the same condition. It is noticed that the BDTT of as-cast NiAl-9Mo is more dependent on strain rate than that of HIPed one. The brittle to ductile transition process of the alloy is related to a sharp drop in strain hardening rate. Regardless of strain rate, the fracture morphology changes from cleavage in NiAl phase and debonding along NiAl/Mo interface below the BDTT to microvoid coalescence above BDTT. The apparent activation energy of the BDT of HIPed and as-cast material are calculated to be 327 and 263 kJ/mol, respectively, suggesting that the mechanism is associated with lattice diffusion in NiAl phase.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china. dalian univ technol, dept mat engn, dalian 116024, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Nial-9mo Eutectic Alloy Bdt Tensile Behavior Nialfe Matrix Composites Mechanical-properties Cr Mo Microstructures Deformation
URL	查看原文
WOS记录号	WOS:000183282000017
引用统计	被引频次：2[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/321006/36011
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. L. Ren,J. T. Guo,G. S. Li,et al. Tensile behavior of NiAl-9Mo eutectic alloy around brittle to ductile transition temperature[J]. Journal of Materials Science & Technology,2003,19(3):253-256.
APA	W. L. Ren,J. T. Guo,G. S. Li,&J. Y. Zhou.(2003).Tensile behavior of NiAl-9Mo eutectic alloy around brittle to ductile transition temperature.Journal of Materials Science & Technology,19(3),253-256.
MLA	W. L. Ren,et al."Tensile behavior of NiAl-9Mo eutectic alloy around brittle to ductile transition temperature".Journal of Materials Science & Technology 19.3(2003):253-256.