Seminars and Events

TCP precipitates in Co-based superalloys studied with atomistic calculations

Date/Time: 16.09.2014. 5:10 p.m.
Place: Ruhr-Universität Bochum, Bochum, Germany

Jörg Koßmann, Ruhr-Universität Bochum, Bochum

Since Sato et al. first observed a L12 phase in the ternary Co-Al-W system, Co-based materials have been shown to be promising candidates for the next generation of superalloys. The precipitation of topologically close-packed (TCP) phases deteriorates the mechanical properties of superalloys. In order to study the stability of such precipitates in Co-base superalloys, we compute the formation energy of typical TCP phases in binary and ternary systems. Furthermore, we apply an empirical structure map to interpret experimental experimental results. Our work is part of the collaborative research center SFB/TR 103.

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