Scholarlink

Nickel-based superalloys, like Inconel 718, are ideal for gas turbines, aircraft engines, and nuclear reactors due to their high-temperature strength, creep resistance, and fatigue resistance. Due to its work-hardening properties, conventional Inconel 718 manufacturing often fails, causing tool wear and material loss. Modern additive manufacturing (AM), especially Laser Powder Bed Fusion (LPBF), produces near-net form components with improved material efficiency. This study evaluates LPBF-produced Inconel 718 surface scratch characteristics in various conditions. After scratch tests on solution-treated substrates, visual inspection and SEM microstructural analysis were performed. The study studies load effects on surface integrity and material deformation. Stress increases scratch breadth and surface degradation. Microstructural analysis showed Nb segregation and δ-Ni3Nb phases near grain boundaries after heat treatment, promoting surface hardness. The study examined scratch behaviour and mechanical properties, including microhardness, and found that additive manufacturing’s detailed thermal cycles caused hardness to decrease across regions. The results demonstrate LPBF Inconel 718’s high-performance potential and the need for improved processing and post-treatment.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Surface Scratch Behaviour of Selective Laser Melted Inconel 718 Superalloy

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Sankata Tiwari,
  • Santosh Kumar,
  • Gagan Bansall,
  • Ashwani Kumar Ranjan,
  • Manvandra Kumar Singh,
  • Gopal Ji

摘要

Nickel-based superalloys, like Inconel 718, are ideal for gas turbines, aircraft engines, and nuclear reactors due to their high-temperature strength, creep resistance, and fatigue resistance. Due to its work-hardening properties, conventional Inconel 718 manufacturing often fails, causing tool wear and material loss. Modern additive manufacturing (AM), especially Laser Powder Bed Fusion (LPBF), produces near-net form components with improved material efficiency. This study evaluates LPBF-produced Inconel 718 surface scratch characteristics in various conditions. After scratch tests on solution-treated substrates, visual inspection and SEM microstructural analysis were performed. The study studies load effects on surface integrity and material deformation. Stress increases scratch breadth and surface degradation. Microstructural analysis showed Nb segregation and δ-Ni3Nb phases near grain boundaries after heat treatment, promoting surface hardness. The study examined scratch behaviour and mechanical properties, including microhardness, and found that additive manufacturing’s detailed thermal cycles caused hardness to decrease across regions. The results demonstrate LPBF Inconel 718’s high-performance potential and the need for improved processing and post-treatment.