Scholarlink

<p>Powder bed fusion–laser beam (PBF-LB) is a primary metal additive manufacturing (AM) process for industrialization. However, post-processing recipes for PBF-LB are distinct from those of conventional manufacturing and remain critical in governing the mechanical performance of PBF-LB components. This study investigates the influence of post-processing on the mechanical behaviour of Haynes 282—a Nickel-based superalloy utilized in turbine exhaust case and other high-temperature (up to 760 °C) applications—fabricated using high productivity themed PBF-LB with layer thickness of 60 and 90 <i>μ</i>m. The as-built condition and recipe with solution treatment at 1150&#xa0;°C (conventional treatment) exhibited anisotropy in both grain morphology and mechanical performance. Increasing the solution Treatment temperature to 1200&#xa0;°C successfully reduced anisotropy in the 60&#xa0;<i>μ</i>m layer thickness build, owing to partial recrystallization, however anisotropy still exists in the 90&#xa0;<i>μ</i>m layer thickness build. Solution treatment at 1250&#xa0;°C resulted in complete recrystallization and isotropic hot ductility across both the builds, albeit with a significant reduction in strength. These microstructural and mechanical response variations are discussed with emphasis on layer thickness, the volumetric energy density, dislocation density in the as-built microstructures, and solution treatment temperatures.</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

Recrystallization Behavior during Postprocessing of an Additively Manufactured Nickel-Based Superalloy

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月7日

查看全文
  • Kameshwaran Swaminathan,
  • Joel Andersson

摘要

Powder bed fusion–laser beam (PBF-LB) is a primary metal additive manufacturing (AM) process for industrialization. However, post-processing recipes for PBF-LB are distinct from those of conventional manufacturing and remain critical in governing the mechanical performance of PBF-LB components. This study investigates the influence of post-processing on the mechanical behaviour of Haynes 282—a Nickel-based superalloy utilized in turbine exhaust case and other high-temperature (up to 760 °C) applications—fabricated using high productivity themed PBF-LB with layer thickness of 60 and 90 μm. The as-built condition and recipe with solution treatment at 1150 °C (conventional treatment) exhibited anisotropy in both grain morphology and mechanical performance. Increasing the solution Treatment temperature to 1200 °C successfully reduced anisotropy in the 60 μm layer thickness build, owing to partial recrystallization, however anisotropy still exists in the 90 μm layer thickness build. Solution treatment at 1250 °C resulted in complete recrystallization and isotropic hot ductility across both the builds, albeit with a significant reduction in strength. These microstructural and mechanical response variations are discussed with emphasis on layer thickness, the volumetric energy density, dislocation density in the as-built microstructures, and solution treatment temperatures.