Scholarlink

<p>Laser powder bed fusion (LPBF) has become an important technology in production of complex nickel-based superalloys, but mechanical reliability is impaired by process-induced anisotropy. In this research, the effect of seven scan orientation strategies, including four unidirectional (0°, 45°, 67°, 90°) and three interleaved (45° + 67°, 45° + 90°, 67° + 90°), was investigated on the microstructural and mechanical behaviour of LPBF-fabricated Inconel 625. The observation of microstructure showed that columnar grains were formed under unidirectional scanning whereas interleaved patterns formed equiaxed morphologies and reduced anisotropy. An ultimate tensile strength of 1198&#xa0;MPa (23.34%) and yield strength of 1045&#xa0;MPa (32.95%) higher than 0° scan orientation with elongation reduction by 19% were observed in the 45° + 67° pattern. The highest hardness of 316 HV was obtained with 67° + 90° scan orientation with equiaxed morphology and lower anisotropy. These results show that scan orientation approaches could be effectively used to regulate grain morphology, mechanical performance, and reduce anisotropy.</p>

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

Microstructural and Mechanical Response of Laser Powder Bed Fusion-Built Inconel 625 to Scan Orientation Strategies

  • 期刊论文

  • 发表日期：

    2026年3月4日

查看全文
  • Hariharan Ravichandar,
  • S. R. Sathishkumar,
  • M. Durairasan,
  • Metin Kök

摘要

Laser powder bed fusion (LPBF) has become an important technology in production of complex nickel-based superalloys, but mechanical reliability is impaired by process-induced anisotropy. In this research, the effect of seven scan orientation strategies, including four unidirectional (0°, 45°, 67°, 90°) and three interleaved (45° + 67°, 45° + 90°, 67° + 90°), was investigated on the microstructural and mechanical behaviour of LPBF-fabricated Inconel 625. The observation of microstructure showed that columnar grains were formed under unidirectional scanning whereas interleaved patterns formed equiaxed morphologies and reduced anisotropy. An ultimate tensile strength of 1198 MPa (23.34%) and yield strength of 1045 MPa (32.95%) higher than 0° scan orientation with elongation reduction by 19% were observed in the 45° + 67° pattern. The highest hardness of 316 HV was obtained with 67° + 90° scan orientation with equiaxed morphology and lower anisotropy. These results show that scan orientation approaches could be effectively used to regulate grain morphology, mechanical performance, and reduce anisotropy.