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<p>Lacking Ti-alloy wires tailored for wire-arc directed energy deposition (waDED) restricts AM-component implementation. Ti–Cu alloys show potential but require additional elements to enhance performance. In this work, waDED-processed Ti–6.3Cu–2.2Fe−2.1Al is characterized. Addition of Cu to Ti achieves a columnar-to-equiaxed transition. The microstructure consists of fine Ti<sub>2</sub>Cu precipitates, <i>β</i> matrix, and <i>α</i> plates, with varying morphologies along the deposit’s height due to differing thermal histories. The as-built sample exhibits a <i>σ</i><sub>Y</sub> of 1039&#xa0;MPa but low ductility.</p>

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Phase Evolution and Mechanical Behavior of a Novel Ti–6.3Cu–2.2Fe−2.1Al Alloy Processed by Wire-Arc Directed Energy Deposition

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月15日

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  • Martin Klein,
  • Ella Staufer,
  • Duyao Zhang,
  • Christian Edtmaier,
  • Jelena Horky,
  • Martin Schmitz-Niederau,
  • Dong Qiu,
  • Mark Easton,
  • Thomas Klein

摘要

Lacking Ti-alloy wires tailored for wire-arc directed energy deposition (waDED) restricts AM-component implementation. Ti–Cu alloys show potential but require additional elements to enhance performance. In this work, waDED-processed Ti–6.3Cu–2.2Fe−2.1Al is characterized. Addition of Cu to Ti achieves a columnar-to-equiaxed transition. The microstructure consists of fine Ti2Cu precipitates, β matrix, and α plates, with varying morphologies along the deposit’s height due to differing thermal histories. The as-built sample exhibits a σY of 1039 MPa but low ductility.