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Thermodynamic Calculation of Equilibrium Precipitation Phases in GH141 Ni-based Superalloy
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University of Science and technology Beijing, School of Material Science and Engineering,University of Science and technology Beijing, School of Material Science and Engineering,State Administration of Science, Technology and Industry for National Defence, Coordination Center,University of Science and technology Beijing, School of Material Science and Engineering,University of Science and technology Beijing, School of Material Science and Engineering,Central Iron and Steel Research Institute, High Temperature Materials Institute,University of Science and Technology Beijing

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    Abstract:

    The equilibrium precipitation phases and the process of non-equilibrium solidification for GH141 Ni-based superalloy were studied by Thermo-Calc software. The main precipitation phases include γ、γ''、σ、μ and carbides (MC,M6C and M23C6). Significant positive segregation of Mo and Ti may occur during solidification based on the calculation, which would decrease the initial melting points of GH141 Ni-based superalloy. The contents of Al and Ti can strongly influence the solvus temperature and the maximum mass fraction of γ'' phase. C is the main control element about the maximum mass fraction of carbides (MC, M6C and M23C6) and the enriched elements of MC, M6C and M23C6 are Ti, Mo and Cr respectively. Research results can provide theoretical basis for composition design and heat treatment.

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[Xu Min, Yang Wuqiang, Zhang Bin, Zhang Maicang, Meng Ye, Xu Guohua, Zheng Lei. Thermodynamic Calculation of Equilibrium Precipitation Phases in GH141 Ni-based Superalloy[J]. Rare Metal Materials and Engineering,2016,45(11):2925~2931.]
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History
  • Received:August 26,2014
  • Revised:October 09,2014
  • Adopted:August 11,2015
  • Online: December 08,2016
  • Published: