Investigation on the dissolution of η phase in a cast Ni-based superalloy
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第1期
论文作者：M.R. Jahangiri H. Arabi S.M.A. Boutorabi
文章页码：42 - 48
摘 要：The dissolution behavior of η phase has been investigated in a cast Ni-based superalloy. The results showed that the platelets and blocks of η phase were formed within the interdendritic regions of the microstructure. Applying standard solution annealing at 1150-1160°C for a period of 4 h did not result in the complete dissolution of η phase. For the complete dissolution of η phase without residual incipient melting, a 2-step solution annealing has been recommended. After dissolution at high temperatures, the η phase transforms to two MC-type carbides: one is enriched in Ti, Nb, and Ta, and the other is of （Zr,Ti）C type.
M.R. Jahangiri1,2，H. Arabi1,3，S.M.A. Boutorabi1,3
1. School of Metallurgy and Materials Engineering, Iran University of Science and Technology3. Center of Excellence for Advanced Materials & Processing, Iran University of Science and Technology
摘 要：The dissolution behavior of η phase has been investigated in a cast Ni-based superalloy. The results showed that the platelets and blocks of η phase were formed within the interdendritic regions of the microstructure. Applying standard solution annealing at 1150-1160°C for a period of 4 h did not result in the complete dissolution of η phase. For the complete dissolution of η phase without residual incipient melting, a 2-step solution annealing has been recommended. After dissolution at high temperatures, the η phase transforms to two MC-type carbides: one is enriched in Ti, Nb, and Ta, and the other is of （Zr,Ti）C type.
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