EFFECT OF Zr ADDITION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF NiAl/Cr(Mo) BASE EUTECTIC ALLOY

IMR OpenIR

	EFFECT OF Zr ADDITION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF NiAl/Cr(Mo) BASE EUTECTIC ALLOY
	Sheng Liyuan 1; Guo Jianting 2; Lai Chen 1; Xi Tingfei 1
通讯作者	Sheng Liyuan(lysheng@yeah.net)
	2015-07-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	51 期号:7 页码:828-834
摘要	NiAl base eutectic alloy is an attractive material and promising to use in high temperature environment. However, the inadequate high temperature strength limits its application. In order to improve its strength, Zr was added in the Ti and Hf doped NiAl/Cr(Mo) base eutectic alloys and the effect of Zr addition on microstructure and mechanical properties of the eutectic alloy was investigated in this work. The results show that small addition of Zr can refine the NiAl/Cr(Mo) lamella inside the eutectic cell and optimize NiAl and Cr(Mo) phase morphology in the intercellular zone. Moreover, the Zr addition promotes the precipitation of bulk Heusler phase along eutectic cell boundary. With the increase of Zr addition, the eutectic cell of the alloys becomes fine, but the NiAl and Cr(Mo) phases in the intercellular zone become coarse and the Heusler phases exhibits semi-continuously distribution along the eutectic cell boundary. When the Zr content increases to 1% (atomic fraction), the NiAl and Cr(Mo) phases in eutectic cell and intercellular zone are all coarsened obviously. Additionally, coarse Cr-rich phases precipitate in the intercellular zone and Heusler phase forms the continuous network along eutectic cell boundary. The addition of Zr promotes the precipitation of coarse beta-NiAl and alpha-Cr phase in Cr(Mo) phase and NiAl phases, respectively. Moreover, the segregation of Heusler phase forming elements along the precipitate interface leads to the formation of a large number of interfacial dislocations. In addition, the addition of Zr results in the precipitation of fine Heusler particles in NiAl phase. It is shown that appropriate addition of Zr can improve the compression strength of Ni-33Al-28Cr-5.5Mo-1.0Ti-0.3Hf eutectic alloys significantly at room temperature and high temperature without reducing its compression plasticity, but more addition of Zr reduces the compressive plastic of the alloy inevitably.
关键词	NiAl/Cr(Mo) base eutectic alloy Zr Heusler phase microstructure compressive property
资助者	Strategic New Industry Development Special Foundation of Shenzhen ; Shenzhen Collaborative Innovation Program of International Cooperation Research Projects ; Shenzhen Technology Development Project
收录类别	SCI
语种	英语
资助项目	Strategic New Industry Development Special Foundation of Shenzhen[JCYJ20140419114548515] ; Strategic New Industry Development Special Foundation of Shenzhen[JCYJ20130402172114948] ; Shenzhen Collaborative Innovation Program of International Cooperation Research Projects[GJHZ20140419114548516] ; Shenzhen Technology Development Project[CXZZ20140731091722497]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000358471900008
出版者	SCIENCE PRESS
引用统计	被引频次：8[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/321006/120477
专题	中国科学院金属研究所
通讯作者	Sheng Liyuan
作者单位	1.Peking Univ, Shenzhen Inst, Shenzhen Key Lab Human Tissue Regenerat & Repair, Shenzhen 518057, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Sheng Liyuan,Guo Jianting,Lai Chen,et al. EFFECT OF Zr ADDITION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF NiAl/Cr(Mo) BASE EUTECTIC ALLOY[J]. ACTA METALLURGICA SINICA,2015,51(7):828-834.
APA	Sheng Liyuan,Guo Jianting,Lai Chen,&Xi Tingfei.(2015).EFFECT OF Zr ADDITION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF NiAl/Cr(Mo) BASE EUTECTIC ALLOY.ACTA METALLURGICA SINICA,51(7),828-834.
MLA	Sheng Liyuan,et al."EFFECT OF Zr ADDITION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF NiAl/Cr(Mo) BASE EUTECTIC ALLOY".ACTA METALLURGICA SINICA 51.7(2015):828-834.