The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures

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	The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures
	Zhang, GY ; Guo, JT ; Zhou, LZ ; Li, GS ; Ye, HQ
通讯作者	Zhang, GY()
	2005
发表期刊	PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5
ISSN	0255-5476
卷号	475-479 页码:2623-2626
摘要	The microstructure and tensile mechanical properties of directionally Solidified NiAl-15Cr alloy at various temperatures have been investigated in this paper. The results reveal that the microstructure consists of dendritic beta-NiAl phase, interdendritic gamma/gamma', gamma' phase transient layer and alpha-Cr precipitation in beta-NiAl phase. With the increase of temperature obvious Brittle-Ductile-Transition (BDT) behavior is observed and the BDT temperature (BDTT) is sensitive to initial strain rate. When the initial strain rate increases by two-order magnitude, the BDTT has an approximate 150K increase. In the temperature range of 1123-1373K, the alloy exhibits good tensile plasticity and poor strength comparing with the NiAl/Cr(Mo,Hf) alloy. Superplastic-like deformation behavior with large elongation (exceed 200%) is achieved at 1323K. The balance between strain hardening (by dislocation glide) and strain softening (dynamic recover and recrystallization) is responsible for the large tensile elongation of this alloy.
关键词	NiAl intermetallics microstructure BDT mechanical properties
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000227494703024
出版者	TRANS TECH PUBLICATIONS LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/82622
通讯作者	Zhang, GY
作者单位	1.Chinese Acad Sci, Met Res Inst, Dept Superalloys, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Met Res Inst, Atom Imaging Solids Lab, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, GY,Guo, JT,Zhou, LZ,et al. The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures[J]. PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5,2005,475-479:2623-2626.
APA	Zhang, GY,Guo, JT,Zhou, LZ,Li, GS,&Ye, HQ.(2005).The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures.PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5,475-479,2623-2626.
MLA	Zhang, GY,et al."The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures".PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5 475-479(2005):2623-2626.