한국분말재료학회지 (Journal of Powder Materials)

  • 제4권1호
  • /
  • Pages.48-54
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  • 1997
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
권호 표지

기계적 합금화된 ODS NiAl에서 분산상 및 기지상의 조대화 거동

Coarsening of Dispersoid and Matrix Phase in Mechanically Alloyed ODS NiAl

  • 어순철 (충주산업대학교 재료공학과)
  • 발행 : 1997.03.01
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초록

NiAl powders containing oxide dispersoids have been produced by mechanical alloying process in a controlled atmosphere using high energy attrition mill. The powders have been consolidated by hot extrusion and hot pressing followed by isothermal annealing to induce microstructure coarsening to improve high temperature properties. Grain growth and dispersoid coarsening kinetics have been investigated as functions of annealing time and temperature. Coarsening of dispersion strengthen NiAl and dispersoid has been discussed. Some clues of secondary recrystallization have been investigated. Mechanical property measurements have been also made and correlated with the microstructures.

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