Estimation of Liquid Physical Properties of Mar-M247LC Superalloy by Directional Solidification

일방향 응고법을 이용한 Mar M-247LC 초내열합금의 액상 물성 측정

  • 김현철 (창원대학교 금속재료공학과) ;
  • 이재현 (창원대학교 금속재료공학과) ;
  • 서성문 (한국기계연구원 재료공정연구부) ;
  • 김두현 (한국기계연구원 재료공정연구부) ;
  • 조창용 (한국기계연구원 재료공정연구부)
  • Published : 2001.09.01

Abstract

Directional solidification experiments have been carried out at the solidification rates from 0.5 to 50$\mu\textrm{m}$/s in Mar M-247LC superalloy in which several important liquid properties were estimated by analyzing the interface stability and temperature gradient at the solid/liquid interface. The diffusion coefficient in the liquid was estimated by employing the constitutional supercooling criterion. The temperature gradients changed with solidification rates and latent heat of solidification. The thermal conductivities of solid and liquid could be estimated by heat flux balance at the solid liquid interface.

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