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Volume 25 Issue 4
Apr.  2018
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文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(4): 453-458
Ya-ran Zhang, Qi Cai, Yong-chang Liu, Zong-qing Ma, Chong Li,  and Hui-jun Li, Evaluation of precipitation hardening in TiC-reinforced Ti2AlNb-based alloys, Int. J. Miner. Metall. Mater., 25(2018), No. 4, pp. 453-458. https://doi.org/10.1007/s12613-018-1591-x
Cite this article as:
Ya-ran Zhang, Qi Cai, Yong-chang Liu, Zong-qing Ma, Chong Li,  and Hui-jun Li, Evaluation of precipitation hardening in TiC-reinforced Ti2AlNb-based alloys, Int. J. Miner. Metall. Mater., 25(2018), No. 4, pp. 453-458. https://doi.org/10.1007/s12613-018-1591-x
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研究论文

Evaluation of precipitation hardening in TiC-reinforced Ti2AlNb-based alloys

  • State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science and Engineering, Tianjin University, Tianjin 300354, China;

  • Materials Genome Institute, Shanghai University, Shanghai 200444, China

  • 通讯作者:

    Yong-chang Liu    E-mail: licmtju@163.com

  • Ti2AlNb-based alloys with 0.0wt%, 0.6wt%, and 2.0wt% carbon nanotube (CNT) addition were fabricated from spherical Ti-22Al-25Nb powder by sintering in the B2 single-phase region. Phase identification and microstructural examination were performed to evaluate the effect of carbon addition on the hardness of the alloys. Carbon was either in a soluble state or in carbide form depending on its concentration. The acicular carbides formed around 1050℃ were identified as TiC and facilitated the transformation of α2+B2 → O. The TiC was located within the acicular O phase. The surrounding O phase was distributed in certain orientations with angles of 65° or 90° O phase particles. The obtained alloy was composed of acicular O, Widmanstatten B2+O, and acicular TiC. As a result of the precipitation of carbides as well as the O phase, the hardness of the alloy with 2.0wt% CNT addition increased to HV 429±9.
    • Research Article

    Evaluation of precipitation hardening in TiC-reinforced Ti2AlNb-based alloys

    + Author Affiliations
      Abstract
    • Ti2AlNb-based alloys with 0.0wt%, 0.6wt%, and 2.0wt% carbon nanotube (CNT) addition were fabricated from spherical Ti-22Al-25Nb powder by sintering in the B2 single-phase region. Phase identification and microstructural examination were performed to evaluate the effect of carbon addition on the hardness of the alloys. Carbon was either in a soluble state or in carbide form depending on its concentration. The acicular carbides formed around 1050℃ were identified as TiC and facilitated the transformation of α2+B2 → O. The TiC was located within the acicular O phase. The surrounding O phase was distributed in certain orientations with angles of 65° or 90° O phase particles. The obtained alloy was composed of acicular O, Widmanstatten B2+O, and acicular TiC. As a result of the precipitation of carbides as well as the O phase, the hardness of the alloy with 2.0wt% CNT addition increased to HV 429±9.
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