Scholarlink

<p>Powder metallurgy with hot isostatic pressing (PM-HIP) is a leading candidate to replace forging as a manufacturing method for structural components in future nuclear reactors. Understanding PM-HIP material performance as compared to conventional forgings under realistic reactor operating conditions is therefore essential for certification and deployment. In this study, PM-HIP and forged Ni-based Alloys 625 and 690 are investigated under neutron irradiation at target damage levels of ~1 and ~3 dpa. Uniaxial tensile tests evaluate the irradiation-induced changes in mechanical behavior, while the irradiation-induced microstructural changes are investigated using transmission electron microscopy and atom probe tomography. Overall, PM-HIP Alloy 625 presents superior mechanical properties compared to forged Alloy 625 under irradiation. This is primarily attributed to an order-of-magnitude lower void population in PM-HIP Alloy 625 compared to its forged counterpart at all damage levels. Minimal differences in irradiation-induced microstructures are observed between PM-HIP and forged Alloy 690, resulting in suppressed differences in mechanical properties. These findings demonstrate comparable or greater irradiation tolerance in PM-HIP Alloys 625 and 690 than in their forged counterparts, providing crucial data to support the qualification of PM-HIP manufacturing of Ni-based alloys for future generation nuclear structural components.</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

Effects of neutron irradiation on Ni-based alloys: a comparative study between PM-HIP and forging

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月4日

查看全文
  • Ronit Roy,
  • Soumita Mondal,
  • Caleb D. Clement,
  • Noah Pearlstein,
  • Yu Lu,
  • Yaqiao Wu,
  • Benjamin Sutton,
  • David W. Gandy,
  • Janelle P. Wharry

摘要

Powder metallurgy with hot isostatic pressing (PM-HIP) is a leading candidate to replace forging as a manufacturing method for structural components in future nuclear reactors. Understanding PM-HIP material performance as compared to conventional forgings under realistic reactor operating conditions is therefore essential for certification and deployment. In this study, PM-HIP and forged Ni-based Alloys 625 and 690 are investigated under neutron irradiation at target damage levels of ~1 and ~3 dpa. Uniaxial tensile tests evaluate the irradiation-induced changes in mechanical behavior, while the irradiation-induced microstructural changes are investigated using transmission electron microscopy and atom probe tomography. Overall, PM-HIP Alloy 625 presents superior mechanical properties compared to forged Alloy 625 under irradiation. This is primarily attributed to an order-of-magnitude lower void population in PM-HIP Alloy 625 compared to its forged counterpart at all damage levels. Minimal differences in irradiation-induced microstructures are observed between PM-HIP and forged Alloy 690, resulting in suppressed differences in mechanical properties. These findings demonstrate comparable or greater irradiation tolerance in PM-HIP Alloys 625 and 690 than in their forged counterparts, providing crucial data to support the qualification of PM-HIP manufacturing of Ni-based alloys for future generation nuclear structural components.