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Direct Laser Metal Deposition (DLMD) enables cost-effective fabrication of hard-to-process alloys. This study investigates the mechanical and microstructural properties of a thin-walled nickel alloy component across multiple orientations. Optical microscopy evaluated the microstructure across various orientations while scanning electron microscopy (SEM) was employed to analyze the fracture surfaces. Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD analyses revealed the elemental composition and phase composition. Results show that tiny cellular structures are evenly distributed across the vertical cross-section, whereas coarse columnar and cellular crystals appear in various directions. The presence of the γ-Ni and laves phase highlights the material's microstructural complexity.

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Microstructure and Mechanical Properties of Thin-Walled Inconel 625 Components Fabricated Using Direct Laser Metal Deposition

  • 会议论文

  • 发表日期：

    2026年

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  • Quan Van Nguyen,
  • Khoa Tat Doan,
  • Chau Van Tran,
  • Cuong Manh Chu,
  • Thanh Nguyen Tai Hoai,
  • Nguy Duong Van,
  • Hoang Van Nguyen

摘要

Direct Laser Metal Deposition (DLMD) enables cost-effective fabrication of hard-to-process alloys. This study investigates the mechanical and microstructural properties of a thin-walled nickel alloy component across multiple orientations. Optical microscopy evaluated the microstructure across various orientations while scanning electron microscopy (SEM) was employed to analyze the fracture surfaces. Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD analyses revealed the elemental composition and phase composition. Results show that tiny cellular structures are evenly distributed across the vertical cross-section, whereas coarse columnar and cellular crystals appear in various directions. The presence of the γ-Ni and laves phase highlights the material's microstructural complexity.