| Title |
Effect of Convection on the Isothermal Coupled Peritectic Solidification in the Single Crystal Superalloy |
| Authors |
구지호(Jiho Gu); 성창훈(Changhoon Sung); 신종호(Jongho Shin); 서성문(Seongmoon Seo); 이재현(Jehyun Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2016.54.4.261 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
alloy; solidification; microstructure; scanning electron microscopy; SEM; eutectic |
| 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. |