Al 7050 단조품의 국부적 불균일 조직 형성에 대한 연구

A Study on the Local Inhomogeneous Structure of Al 7050 Forged Part

  • 이정환 (한국기계연구원 재료공정연구부) ;
  • 김대용 (대우중공업 중앙연구소 소재기술실) ;
  • 김재곤 (대우중공업 중앙연 구소 소재기술실) ;
  • 이상용 (한국기계연구원 재료공정연구부) ;
  • 이영선 (한국기계연구 원 재료공정연구부) ;
  • 전승문 (국방과학연구소) ;
  • 이명건 (국방과학연구소)
  • 발행 : 1995.06.01

초록

Age hardenable aluminum alloys show high specific strength, good thermal and electrical conductivity as well as lightness, and are typical aircraft materials. High fatigue strength and good resistancy against stress corrosion cracking are also important for aircraft aluminum alloys. Al alloy 7050 has been developed to meet the above mentioned requirements and the use of this alloy as forged aircraft part becomes more important. However, forged 7050 parts showed undersirable structures such as severe local grain coarsening in surface area and unproper metal flow that is degrading mechanical properties. In this paper, microstructural aspects of die forging in the Al alloy 7050 are investigated. Also suggested are the optimal forging conditions for microstructural control of Al alloy 7050.

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