Abstract
The aim of the work is estimation of usefulness of several selected etchants and image acquisition methods for revealing of microstructure of CMSX-4 nickel–based superalloy from computer-aided quantitative metallography’s point of view. The analysis was carried out on images registered using light and scanning electron microscopes. The images of the microstructure have been analyzed in γ γ’ eutectic’s investigations context, especially to estimate the eutectic quantitatively. The work contains description of experimental method for quantitative evaluation of γ γ’ eutectic present in as-cast state of the superalloy. A quantitative evaluation of γ γ’ eutectic islands in CMSX 4 superalloy is indispensable for a proper evaluation of γ’ phase precipitates. It is mainly related to coarse cellular γ’ phase precipitates present in γ γ’ eutectic islands.
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