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Laser-directed energy depositionLaser-directed energy deposition and the in-situ alloying processes were used to manufacture in-situ TiBw/Ti6Al4VTiBw/Ti6Al4V composites while varying laser energy density and mass flow rate of TiB2, respectively. A novel network microstructure was observed in all the in-situ TiBw/Ti6Al4VTiBw/Ti6Al4V composite specimens. The influence of laser energy density was investigated on the microstructure and microhardness of the in-situ TiBw/Ti6Al4VTiBw/Ti6Al4V composite. It was found that the size of grains and in-situ TiB-whiskers varied as the laser energy density increased. A similar matrix morphology was found in all the in-situ TiBw/Ti6Al4VTiBw/Ti6Al4V composite specimens. A significant increase was observed in the microhardness of the in-situ TiBw/Ti6Al4V composite specimens as the laser energy density and mass flow rate increased.

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Influence of Process Parameters on the Network Microstructure of In-Situ Synthesized TiBw/Ti6Al4V Composites Produced by Laser-Directed Energy Deposition

  • 会议论文

  • 发表日期：

    2025年

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  • Bathusile Masina,
  • Hosia Kgomo,
  • Monnamme Tlotleng,
  • Paul Lekoadi

摘要

Laser-directed energy depositionLaser-directed energy deposition and the in-situ alloying processes were used to manufacture in-situ TiBw/Ti6Al4VTiBw/Ti6Al4V composites while varying laser energy density and mass flow rate of TiB2, respectively. A novel network microstructure was observed in all the in-situ TiBw/Ti6Al4VTiBw/Ti6Al4V composite specimens. The influence of laser energy density was investigated on the microstructure and microhardness of the in-situ TiBw/Ti6Al4VTiBw/Ti6Al4V composite. It was found that the size of grains and in-situ TiB-whiskers varied as the laser energy density increased. A similar matrix morphology was found in all the in-situ TiBw/Ti6Al4VTiBw/Ti6Al4V composite specimens. A significant increase was observed in the microhardness of the in-situ TiBw/Ti6Al4V composite specimens as the laser energy density and mass flow rate increased.