Improvement in the high-temperature strength of alloys based on cobalt by internal nitriding

Abstract

Internal nitriding, as for internal oxidation, may be considered as a particular case of material dispersion strengthening. Internal nitriding is accompanied by preparation of a heterophase structure of a diffusion layer: The matrix is a solid solution with fine particles of alloying element nitride particles distributed within it. Internal nitriding may be special importance as a version of dispersion hardening for high-temperature alloys. Possibilities are considered in this article for internal nitriding of cobalt alloys.