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EFFECT OF Zr ADDITION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF NiAl/Cr(Mo) BASE EUTECTIC ALLOY
Sheng Liyuan1; Guo Jianting2; Lai Chen1; Xi Tingfei1
Corresponding AuthorSheng Liyuan(lysheng@yeah.net)
2015-07-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume51Issue:7Pages:828-834
AbstractNiAl 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.
KeywordNiAl/Cr(Mo) base eutectic alloy Zr Heusler phase microstructure compressive property
Funding OrganizationStrategic New Industry Development Special Foundation of Shenzhen ; Shenzhen Collaborative Innovation Program of International Cooperation Research Projects ; Shenzhen Technology Development Project
Indexed BySCI
Language英语
Funding ProjectStrategic 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 Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000358471900008
PublisherSCIENCE PRESS
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/120477
Collection中国科学院金属研究所
Corresponding AuthorSheng Liyuan
Affiliation1.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
Recommended Citation
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.
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