Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-355-C7-358
Chemical composition around γ/γ' interface in single crystal nickel-based superalloys in the early stage of creepA. RACINE and A. HAZOTTE
Laboratoire de Science et Génie des Matériaux Métalliques, URA 159 du CNRS, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy cedex, France
The aim of this work was to examine if a chemical anisotropy around γ' precipitates could be induced by the applied stress at the beginning of a compressive creep test. This question was solved in terms of concentration profiles around γ' in order to see which alloying elements diffuse and if they do, in which direction. The results were discussed in the light of finite element simulations where the local stress states were determined in terms of equivalent Von Mises stress and hydrostatic pressure.
© EDP Sciences 1993