한국소성가공학회:학술대회논문집 (Proceedings of the Korean Society for Technology of Plasticity Conference)

한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
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Udimet 720Li 합금의 항온단조 변형특성

Deformation Characteristics of Udimet 720Li during Isothermal Forging

  • 염종택 (한국기계연구원 재료공정연구부 소성응용그룹) ;
  • 나영상 (한국기계연구원 재료공정연구부 소성응용그룹) ;
  • 박노광 (한국기계연구원 재료공정연구부 소성응용그룹)
  • 발행 : 2001.05.01
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초록

Hot deformation behavior of Udimet 720Li was characterized by compression tests in the temperature range of $1025^{\circ}C\;to\;1150^{\circ}C$ and the strain rate rage of $0.0005s^{-1}\;to\;5s^{-1}$. In order to characterize the dependence of flow stress on strain, strain rate and temperature, a constitutive equation based on hyperbolic sine formation was used. Isothermal forging of Udimet 720Li was performed in the temperature range $1050-1150^{\circ}C$ at strain rates of $0.05s^{-1}\;and\;0.005s^{-1}$. FE simulation was also carried out to predict deformation microstructures during isothermal forging.

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