• Title, Summary, Keyword: Mar M-247 LC

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Estimation of Liquid Physical Properties of Mar-M247LC Superalloy by Directional Solidification (일방향 응고법을 이용한 Mar M-247LC 초내열합금의 액상 물성 측정)

  • Kim, Hyeon-Cheol;Lee, Jae-Hyeon;Seo, Seong-Mun;Kim, Du-Hyeon;Jo, Chang-Yong
    • Korean Journal of Materials Research
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    • v.11 no.9
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    • pp.721-726
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    • 2001
  • 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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A Study of Carbide Thapping and Growth in the Directional Solidification of MAR-M247 LC Super alloy (Ni기 초내열합금의 일방향 응고에서 탄화물의 Trapping과 성장 거동)

  • Lee, Jae-Hyeon;Jin, Geon;Lee, Yong-Tae;Choe, Seung-Ju
    • 연구논문집
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    • pp.95-102
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    • 1996
  • The carbide growth behavior of MAR-M247 LC alloy was investigated by directional solidification and quench method. The carbide volume fraction, trapping and growth behavior were correlated with the growth rate. It was found that the carbide volume fraction decreases at slower growth rate. This decreasing was caused by lower solid-liquid interface trapping ability at the slower growth rate.

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