한국분말재료학회지 (Journal of Powder Materials)

  • 제13권1호
  • /
  • Pages.25-32
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  • 2006
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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산화물 분산강화 동합금의 열처리에 따른 미세조직 및 기계적 특성 변화

Effect of Annealing on Microstructural and Mechanical Property Variation of the Oxide-Dispersion-Strengthened Cu alloy

  • 김용석 (국민대학교 신소재공학부)
  • Kim Yong-Suk (School of Advanced Materials Engineering, Kookmin University)
  • 발행 : 2006.01.01
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초록

The alumina dispersion-strengthened (DS) C15715 Cu alloy fabricated by a powder metallurgy route was annealed at temperatures ranging from $800^{\circ}C\;to\;1000^{\circ}C$ in the air and in vacuum. The effect of the annealing on microstructural stability and room-temperature mechanical properties of the alloy was investigated. The microstructure of the cold rolled OS alloy remained stable until the annealing at $900^{\circ}C$ in the air and in vacuum. No recrystallization of original grains occurred, but the dislocation density decreased and newly formed subgrains were observed. The alloy annealed at $1000^{\circ}C$ in the air experienced recrystallization and grain growth took place, however annealing in vacuum at $1000^{\circ}C$ did not cause the microstructural change. The mechanical property of the alloy was changed slightly with the annealing if the microstructure remained stable. However, the strength of the specimen that was recrystallized decreased drastically.

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