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Investigation on the dissolution of η phase in a cast Ni-based superalloy

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Abstract

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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Authors and Affiliations

  1. School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, 16846-13114, Iran

    M. R. Jahangiri, H. Arabi & S. M. A. Boutorabi

  2. Metallurgy Department, Niroo Research Institute, Tehran, 14686, Iran

    M. R. Jahangiri

  3. Center of Excellence for Advanced Materials & Processing, Iran University of Science and Technology, Tehran, 16846-13114, Iran

    H. Arabi & S. M. A. Boutorabi

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  1. M. R. Jahangiri
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  2. H. Arabi
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Correspondence to M. R. Jahangiri.

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Jahangiri, M.R., Arabi, H. & Boutorabi, S.M.A. Investigation on the dissolution of η phase in a cast Ni-based superalloy. Int J Miner Metall Mater 20, 42–48 (2013). https://doi.org/10.1007/s12613-013-0691-x

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  • DOI: https://doi.org/10.1007/s12613-013-0691-x

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