Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Evolution on Microstructures and Tensile Properties of 10Cr-1Mo ODS Steel with Different Lengths of Mechanical Alloying Process Times

10Cr-1Mo 산화물 분산강화 강의 미세조직과 인장특성에 미치는 기계적 합금화 공정시간의 영향

  • Noh, Sanghoon (Department of Materials Science and Engineering, Pukyong National University) ;
  • Kim, Tae Kyu (Nuclear Materials Division, Korea Atomic Energy Research Institute)
  • 노상훈 (부경대학교 재료공학과) ;
  • 김태규 (한국원자력연구원 재료안전기술개발부)
  • Received : 2021.08.12
  • Accepted : 2021.08.31
  • Published : 2021.10.28
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Abstract

In this study, we investigate the effect of the duration of mechanical alloying on the microstructures and mechanical properties of ODS ferritic/martensitic steel. The Fe(bal.)-10Cr-1Mo pre-alloyed powder and Y2O3 powder are mechanically alloyed for the different mechanical alloying duration (0 to 40 h) and then constantly fabricated using a uniaxial hot pressing process. Upon increasing the mechanical alloying time, the average powder diameter and crystallite size increased dramatically. In the initial stages within 5 h of mechanical alloying, inhomogeneous grain morphology is observed along with coarsened carbide and oxide distributions; thus, precipitate phases are temporarily observed between the two powders because of insufficient collision energy to get fragmented. After 40 h of the MA process, however, fine martensitic grains and uniformly distributed oxide particles are observed. This led to a favorable tensile strength and elongation at room temperature and 650℃.

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References

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