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<p>In this study, a preliminary experimental investigation was conducted to assess the feasibility of using the cold spray process for the fabrication of capsules intended for hot isostatic pressing (HIP). Mild steel powder was employed as the feedstock material for cold spray deposition. Microstructural characterization and mechanical testing indicated that the as-sprayed mild steel coating exhibited inadequate properties for use as a HIP capsule material. However, subsequent heat treatment led to a substantial enhancement of the coating’s mechanical performance. Specifically, the elongation at break increased from approximately 1% to 20%, while the ultimate tensile strength improved from about 65 to 250&#xa0;MPa. Finally, encapsulated HIP experiments were performed using cold-sprayed capsules. The deformation of the capsule during the HIP process was found to be insufficient to achieve full densification of the nickel-based alloy powder, likely due to the excessive thickness of the capsule walls.</p>

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Application of Cold Spray Mild Steel Coating as a Capsule for Hot Isostatic Pressing of Metal Powder

  • 期刊论文

  • 发表日期：

    2025年11月7日

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  • P. Alikin,
  • V. Cheverikin,
  • M. Khomutov,
  • P. Petrovskiy,
  • P. Sokolov,
  • A. Sova,
  • A. Travyanov

摘要

In this study, a preliminary experimental investigation was conducted to assess the feasibility of using the cold spray process for the fabrication of capsules intended for hot isostatic pressing (HIP). Mild steel powder was employed as the feedstock material for cold spray deposition. Microstructural characterization and mechanical testing indicated that the as-sprayed mild steel coating exhibited inadequate properties for use as a HIP capsule material. However, subsequent heat treatment led to a substantial enhancement of the coating’s mechanical performance. Specifically, the elongation at break increased from approximately 1% to 20%, while the ultimate tensile strength improved from about 65 to 250 MPa. Finally, encapsulated HIP experiments were performed using cold-sprayed capsules. The deformation of the capsule during the HIP process was found to be insufficient to achieve full densification of the nickel-based alloy powder, likely due to the excessive thickness of the capsule walls.