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Vol.54, No.4, 261 ~ 270, 2016
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| Title |
| Effect of Convection on the Isothermal Coupled Peritectic Solidification in the Single Crystal Superalloy |
| 구지호 Jiho Gu , 성창훈 Changhoon Sung , 신종호 Jongho Shin , 서성문 Seongmoon Seo , 이재현 Jehyun Lee |
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| Abstract |
| The γ/γ´ two-phase growth commonly observed at γ interdendritic regions in Ni-base superalloys is known to be the eutectic microstructure. However, it is still unclear whether this is due to a eutectic or peritectic reaction. Directional solidification experiments of the Ni-base superalloy CMSX-10 were performed at low solidification rates in order to induce the coupled growth of γ/γ´ phases and to investigate their growth behavior. The γ and γ´ phases were found to grow simultaneously, maintaining an isothermal interface. Directional solidification experiments in a thin tube (0.8 mm ID) suggest that convection enhances the formation of two phase peritectic growth with a planar interface and the γ/γ´ might be the couped peritectic. |
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| Key Words |
| alloy, solidification, microstructure, scanning electron microscopy, SEM, eutectic |
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