Effect of TaC Powder Addition on the Microstructure and Mechanical Properties of Ti–Nb–Mn Alloy <i>via</i> Vacuum Sintering Process

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  • Huang Kuo-Tsung
    Department of Auto-Mechanics, National Kangshan Agricultural Industrial Senior High School
  • Chang Shih-Hsien
    Department of Materials and Mineral Resources Engineering, National Taipei University of Technology
  • Huang Yi-Wen
    Department of Materials and Mineral Resources Engineering, National Taipei University of Technology
  • Liang Cheng
    Department of Materials and Mineral Resources Engineering, National Taipei University of Technology
  • Li Chien-Lun
    Voestalpine Technology Institute (Asia) Co. Ltd.

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  • Effect of TaC Powder Addition on the Microstructure and Mechanical Properties of Ti-Nb-Mn Alloy via Vacuum Sintering Process

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Abstract

<p>This study involved the fabrication of Ti–10Nb–3Mn–XTaC composites through the vacuum sintering process of powder metallurgy, where different proportions of TaC powders (X = 1, 2, and 3 mass%) were added. The composites were sintered under vacuum conditions at temperatures of 1225, 1250, 1275, and 1300°C for 1 hour each. The experimental findings indicate that the addition of 2 mass% TaC powders to the Ti–10Nb–3Mn alloys resulted in the optimal mechanical properties when sintered at 1275°C for 1 hour. The specimen exhibited a relative density of 96.24%, a hardness of 67.38 HRA, and achieved values of 1276.63 MPa for TRS (tensile rupture strength) and 40.37 GPa for the flexural modulus. The electron backscatter diffraction (EBSD) results revealed that the TaC facilitated the in-situ formation of TiC during the sintering process, which was uniformly dispersed in the Ti matrix. Additionally, the Ta atoms acted as β-stabilizing elements, forming a solid solution in the Ti matrix and improving both the microstructure and mechanical properties of the Ti alloys.</p>

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 64 (12), 2714-2721, 2023-12-01

    The Japan Institute of Metals and Materials

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