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首页> 外文期刊>Materials Science and Engineering >Phase precipitation behavior and mechanical properties of multi-phase Nb-Ti-C and Nb-Ti-Al-C alloys
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Phase precipitation behavior and mechanical properties of multi-phase Nb-Ti-C and Nb-Ti-Al-C alloys

机译：多相Nb-Ti-C和Nb-Ti-Al-C合金的相沉淀性能和力学性能

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摘要

The microstructural evolution and mechanical behavior of Nb-35Ti-4C, Nb-35Ti-4C-15Al, Nb-25Ti-8C and Nb-25Ti-8C-15Al (at. %) alloys prepared using traditional arc-melting process were investigated. Nb-Ti-Al-C alloy consists of Nbss phase and eutectic phases of Nbss and (Nb, Ti)C in as-cast state. The addition of 8 at. % C leads to the generation of massive primary (Nb, Ti)C while the addition of 15 at.% Al results in the formation of Nb_3Al phase. After heat treatment, secondary (Nb, Ti)C and secondary Nbss precipitate within Nbss and (Nb, Ti) C, respectively. Meanwhile, massive Nb_3Al phase precipitates from parent Nbss in the alloy containing Al element. Both the precipitation of secondary Nbss and Nb_3Al follows a strict orientation relationship with the parent phase. Mechanical properties of the as-cast and heat-treated specimens at room and evaluated temperatures are significantly increased by adopting C and Al elements, as more (Nb, Ti)C and Nb_3Al acting as the strengthening phase are introduced. Whereas, the plasticity of the alloys decreases owing to the formation of massive brittle carbide and Nb_3Al.
机译：采用传统弧熔过程制备的Nb-35Ti-4C，Nb-35Ti-4C-15Al，Nb-35Ti-8c，Nb-25Ti-8c和Nb-25ti-8c-15Al（At.％）合金的微观结构演化和力学行为。 Nb-Ti-Al-C合金由以浇铸状态的NBSS和（NB，Ti）C的NBSS相和共晶相组成。加入8。 ％C导致大量初级（Nb，Ti）C的产生，同时添加15.％Al导致形成Nb_3Al相的形成。在热处理后，分别分别在NBS和（Nb，Ti）C中沉淀出次级（Nb，Ti）C和次级NBS。同时，大规模的Nb_3aal相位从含有Al元素的合金中的母体NBS沉淀出来。次级NBS和NB_3AL的沉淀均遵循严格的定向关系与父阶段。通过采用C和Al元素，通过采用C和Al元素，通过采用C和Al元素，在引入时，通过采用C和Al元素来显着增加浇铸和热处理的样品和评价温度的机械性能。然而，由于巨大的脆性碳化物和Nb_3Al的形成，合金的可塑性降低。

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  • 来源
    《Materials Science and Engineering》 |2021年第20期|141218.1-141218.12|共12页
  • 作者

    Wenqing Wei; Jing Sun; Shuzhi Zhang; Bingqiang Liu; Kai Yan; Jiqiu Qi; Hao Zhang;

  • 作者单位

    School of Mechanical-electronic and Vehicle Engineering Weifang University Weifang 261061 PR China;

    College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao 266590 PR China;

    School of Mechanical-electronic and Vehicle Engineering Weifang University Weifang 261061 PR China;

    School of Mechanical-electronic and Vehicle Engineering Weifang University Weifang 261061 PR China;

    College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao 266590 PR China;

    School of Materials Science and Engineering China University of Mining and Technology Xuzhou 221116 PR China;

    Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nb-Ti-Al-C alloy; Phase precipitation; Heat treatment; Mechanical properties;

    机译：NB-Ti-Al-C合金;相降水;热处理;机械性能;

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