Influence of aging treatment on precipitation behavior of η phase in Ni-Co-Cr alloy

  • Wen-juan WanEmail author
  • Guang-wei Han
  • Bo Deng


The influence of aging treatment on precipitation behavior of η phase in a new Ni-Co-Cr fastener superalloy, AEREX350, was investigated by means of optical microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The precipitation behavior of η phase with two kinds of morphologies in this material was found to be sensitive to the temperature and time of aging treatment. Time-temperature-transformation curves of these two η phase were achieved. Furthermore, diffraction patterns revealed the semi-coherent orientation relationship between Η phase and γ matrix. This approach may be used to optimize the microstructure of the alloy for excellent mechanical properties.

Key words

precipitation Η phase aging 


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Copyright information

© China Iron and Steel Research Institute Group 2010

Authors and Affiliations

  1. 1.Department of High Temperature Materials ResearchCentral Iron and Steel Research InstituteBeijingChina

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