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<p>At the NRC “Kurchatov Institute”—VIAM, metal powder compositions (MPC) of domestic heat-resistant titanium aluminide alloys were fabricated using electrode induction melting gas atomization. They included Ti–44.5AI–2V–1Nb–2Cr–0.1Gd (at %) γ‑TiAl alloy (grade VIT7L) and Ti–22Al–23Nb–0.5Mo–0.8Zr–1.4 V–0.4Si–0.2C (at. %) orthorhombic Ti<sub>2</sub>AlNb alloy (grade VTI‑4). Elemental analysis of the metal powders demonstrated a&#xa0;close match to the initial cast electrodes. The powders consist of rapidly solidified in-situ particles with dendritic structure and metastable phase compositions of (γ+α(α<sub>2</sub>)+β) and (β+α<sub>2</sub>+O), typical for the quenched state of the VIT7L and VTI‑4 alloys, respectively. The MPCs of the target fraction (40–100 µm) displayed high quality indices of flowability and sphericity, making them suitable for additive manufacturing by selective electron beam melting (SEBM) technology.</p>

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Gas atomized powder compositions of heat-resistant titanium aluminide alloys

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • P. V. Panin,
  • I. A. Bogachev,
  • E. B. Alekseev,
  • E. A. Lukina,
  • D. I. Sukhov,
  • S. A. Naprienko

摘要

At the NRC “Kurchatov Institute”—VIAM, metal powder compositions (MPC) of domestic heat-resistant titanium aluminide alloys were fabricated using electrode induction melting gas atomization. They included Ti–44.5AI–2V–1Nb–2Cr–0.1Gd (at %) γ‑TiAl alloy (grade VIT7L) and Ti–22Al–23Nb–0.5Mo–0.8Zr–1.4 V–0.4Si–0.2C (at. %) orthorhombic Ti2AlNb alloy (grade VTI‑4). Elemental analysis of the metal powders demonstrated a close match to the initial cast electrodes. The powders consist of rapidly solidified in-situ particles with dendritic structure and metastable phase compositions of (γ+α(α2)+β) and (β+α2+O), typical for the quenched state of the VIT7L and VTI‑4 alloys, respectively. The MPCs of the target fraction (40–100 µm) displayed high quality indices of flowability and sphericity, making them suitable for additive manufacturing by selective electron beam melting (SEBM) technology.