Superalloy metallurgy
Superalloys
Article REF: M4770 V1
Superalloy metallurgy
Superalloys

Author : Philippe HERITIER

Publication date: July 10, 2022 | Lire en français

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3. Superalloy metallurgy

3.1 Microstructure and phases (Ni and Fe-Ni bases)

The metallographic structure of a superalloy is made up of several phases .

  • An austenitic γ matrix with a face-centered cubic structure (cfc) in which the elements Co, Cr, Mo, W and, to a lesser extent, Nb, Al, Ti and Ta can be substituted for Ni. These elements provide hardening in solid solution (figure

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