Approx. alloy composition: Ni-23Cr-13W-3Fe-1Mo-0.1C. I am really troubled by a blocky shaped Cr-rich phase formed in a service aged Ni -base superalloy. It does not get properly indexed in EBSD or the SAED patterns are not fully matching with M23C6 type of cabides. EDAX analysis shows the phase having 28-32% Ni and 16-19% W in it apart from 36-38%Cr.

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