한국분말재료학회지 (Journal of Powder Materials)

  • 제13권3호
  • /
  • Pages.172-177
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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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Al2O3 첨가에 따른 7xxx계 알루미늄 소결체의 시효특성 변화

Aging Characteristics of 7xxx Series Al Composites with Al2O3

  • 민경호 (한양대학교 재료공학부) ;
  • 박광현 (한양대학교 재료공학부) ;
  • 서영익 (한양대학교 재료공학부) ;
  • 장시영 (한국항공대학교 항공재료공학과) ;
  • 김영도 (한양대학교 재료공학부)
  • Min Kyung-Ho (Division of Materials Science and Engineering, Hanyang University) ;
  • Park Kwang-Hyun (Division of Materials Science and Engineering, Hanyang University) ;
  • Seo Young-Ik (Division of Materials Science and Engineering, Hanyang University) ;
  • Chang Si-Young (Department of Materials Engineering, Hankuk Aviation University) ;
  • Kim Young-Do (Division of Materials Science and Engineering, Hanyang University)
  • 발행 : 2006.06.01
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초록

Aging characteristics and mechanical properties of commercial 7xxx series Al composites were investigated from viewpoint of ceramic contents. After sintering process, sintered densities of blended and composite powder were 95 and 97%, respectively. Each part was solution-treated at $475^{\circ}C$ for 60 min and aged $175^{\circ}C$. And two-step aging was also performed form $120^{\circ}C$ to $175^{\circ}C$. The aging behavior of the sintered composite pow-der was different from that of sintered blended powder. The peak aging time of the composite was rapid as well due to strain. Before aging, mechanical properties of sintered composite powder was significantly higher than that of sintered blended powder. These increments of properties were directly affected by ceramic particles. However, after aging, incremental rate of mechanical properties was slowed in the composite.

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