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High-strength Nb alloys are known for their high-temperatureTemperature stability, making them ideal for aerospace applications. However, due to their high densityDensity, Nb alloys are only practical in high-temperatureTemperature areas. To reduce the weight of rocket components, Nb alloys can be combined with Ti alloys. TitaniumTitanium and niobium do not form intermetallic phases during thermal fusion, which enables their joiningJoining in laser-based additive manufacturingAdditive manufacturing processes. This study explores the deposition of AMtrinsic® Nb–Ta–W–Zr alloy powder onto a 3D-printed Ti6Al4VTi6Al4V alloy using direct energy depositionDirect energy deposition (DED) in a hybrid SKYPRINT 2 3D printer. Subsequently, Ti6Al4VTi6Al4V was deposited on the printed Nb-based layers. The layered Ti-Nb-Ti sample was analyzed using scanning electron microscopyScanning electron microscopy, and microhardnessMicrohardness measurements were conducted to identify differences in material properties depending on the joiningJoining direction. Finally, measures to improve joiningJoining quality during 3D printing3D printing of multi-materials based on Ti and Nb are proposed.

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Joining Niobium Refractory Alloy with Titanium Alloy in Direct Energy Deposition Additive Manufacturing Process

  • 会议论文

  • 发表日期：

    2025年

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  • Olexandr Grydin,
  • Yevgen Karakash,
  • Olena Karpovych,
  • Sven Gründer,
  • Mirko Schaper,
  • Florian Hengsbach

摘要

High-strength Nb alloys are known for their high-temperatureTemperature stability, making them ideal for aerospace applications. However, due to their high densityDensity, Nb alloys are only practical in high-temperatureTemperature areas. To reduce the weight of rocket components, Nb alloys can be combined with Ti alloys. TitaniumTitanium and niobium do not form intermetallic phases during thermal fusion, which enables their joiningJoining in laser-based additive manufacturingAdditive manufacturing processes. This study explores the deposition of AMtrinsic® Nb–Ta–W–Zr alloy powder onto a 3D-printed Ti6Al4VTi6Al4V alloy using direct energy depositionDirect energy deposition (DED) in a hybrid SKYPRINT 2 3D printer. Subsequently, Ti6Al4VTi6Al4V was deposited on the printed Nb-based layers. The layered Ti-Nb-Ti sample was analyzed using scanning electron microscopyScanning electron microscopy, and microhardnessMicrohardness measurements were conducted to identify differences in material properties depending on the joiningJoining direction. Finally, measures to improve joiningJoining quality during 3D printing3D printing of multi-materials based on Ti and Nb are proposed.