Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Analysis on Milling Behavior of Oxide Dispersion Strengthened Ni-based Atomizing Powder with Ni5Y Intermetallic Phase

Ni5Y 합금상이 형성된 Ni계 산화물 분산강화 아토마이징 분말의 밀링 거동 분석

  • Park, Chun Woong (Department of Materials Science and Engineering, Hanyang University) ;
  • Byun, Jong Min (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Choi, Won June (Department of Materials Science and Engineering, Hanyang University) ;
  • Kim, Young Do (Department of Materials Science and Engineering, Hanyang University)
  • 박천웅 (한양대학교 신소재공학과) ;
  • 변종민 (서울과학기술대학교 신소재공학과) ;
  • 최원준 (한양대학교 신소재공학과) ;
  • 김영도 (한양대학교 신소재공학과)
  • Received : 2019.03.11
  • Accepted : 2019.04.17
  • Published : 2019.04.28
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Abstract

Ni-based oxide dispersion strengthened (ODS) alloys have a higher usable temperature and better high-temperature mechanical properties than conventional superalloys. They are therefore being explored for applications in various fields such as those of aerospace and gas turbines. In general, ODS alloys are manufactured from alloy powders by mechanical alloying of element powders. However, our research team produces alloy powders in which the $Ni_5Y$ intermetallic phase is formed by an atomizing process. In this study, mechanical alloying was performed using a planetary mill to analyze the milling behavior of Ni-based oxide dispersions strengthened alloy powder in which the $Ni_5Y$ is the intermetallic phase. As the milling time increased, the $Ni_5Y$ intermetallic phase was refined. These results are confirmed by SEM and EPMA analysis on microstructure. In addition, it is confirmed that as the milling increased, the mechanical properties of Ni-based ODS alloy powder improve due to grain refinement by plastic deformation.

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