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电弧熔炼态NiAl-V合金的组织演变与力学性能
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内蒙古科技大学材料与冶金学院

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TG113.25

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国家自然科学(No.51564041) 内蒙古自然科学(No.2014MS0518) 内蒙古科技大学产学研培育基金项目(No.PY201509) 内蒙古科技大学材冶学院青年人才资助项目(No.2014CY012)


Microstructure and Properties of NiAl-V Alloy Prepared by Arc Melting
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)(No.51564041) Inner Mongolia Natural Science Foundation Project (No.2014MS0518) Inner Mongolia University of Science and Technology Production and Research and Cultivation Fund Project (No.PY201509) Inner Mongolia University of Science and Technology of Metallurgical Institute of young talent funding project (No.2014CY012)

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    摘要:

    采用真空电弧熔炼制备了Ni-34Al-32V(at.%)及Ni-28.5Al-43V(at.%)成分的合金。对于真空电弧熔炼纽扣锭不同位置处微观组织及力学性能进行了研究。利用光学显微镜(OM),X射线衍射(XRD),扫描电镜(SEM) 分析了合金不同凝固位置处的相组成和组织形态, 结果表明,32V合金的凝固组织由NiAl初生枝晶及NiAl+V片层共晶组成;43V合金的凝固组织由V初生枝晶与NiAl+V片层共晶共同组成。同时对合金进行了力学性能测试,高温压缩强度与室温断裂韧性较NiAl合金均有很大提高,表明V的加入可提高NiAl合金的室温断裂韧性与高温强度。

    Abstract:

    The ternary alloy of Ni-34Al-32V(at%) and Ni-28.5Al-43V were prepared with success by vacuum non-consumable arc melting.The various locations of alloy solidified microstructure and compression behavior were investigated by using optical microscope(OM), X-ray diffraction(XRD) as well as scanning electron microscope (SEM).The results show that the solidified microstructure of the ternary alloy NiAl-32V was mainlly composed of the NiAl primary phases and NiAl+V eutectic.Meanswhile, the NiAl-43V was mainlly composed of the V primary phases and NiAl+V eutectic.At the same time, the mechanical properties of these two alloys were tested.From the fact, the compressive properties at room and elevated temperatures of the two composites are much higher than those of NiAl alloy.According the fact that V additions can remarkably improve the room-temperature fracture toughness and the elevated temperature strength of the NiAl-V alloy.

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马雪微,张建飞,郝文纬,任慧平,陈林,刘永珍.电弧熔炼态NiAl-V合金的组织演变与力学性能[J].稀有金属材料与工程,2018,47(11):3528~3535.[maxuewei, zhangjianfei, haowenwei, renhuiping, chenlin, liuyongzhen. Microstructure and Properties of NiAl-V Alloy Prepared by Arc Melting[J]. Rare Metal Materials and Engineering,2018,47(11):3528~3535.]
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  • 收稿日期:2017-02-28
  • 最后修改日期:2017-07-29
  • 录用日期:2017-08-16
  • 在线发布日期: 2018-12-19
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