#7447. Effect of Ru addition on ?/?? microstructural stability in a low-density CoNi based superalloy

October 2026publication date
Proposal available till 18-05-2025
4 total number of authors per manuscript0 $

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Journal’s subject area:
Mechanical Engineering;
Mechanics of Materials;
Metals and Alloys;
Condensed Matter Physics;
Materials Science (all);
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Abstract:
The present work explores the effect of ruthenium (Ru) addition to the ?/?? strengthened Co-30Ni-10Al-5Mo-2Nb superalloy. A 2 at.% Ru increases the ?/?? microstructural stability at 900°C. XRD and APT revealed a reduction of ?/?? lattice misfit by ? 26% and segregation of Ru at ?/?? interface, respectively that contribute to the decrease of ?/?? interfacial energy.
Keywords:
Co-based superalloys; Coarsening kinetics; Lattice misfit; Partitioning coefficient; Ruthenium

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