J. Phys. IV France 11 (2001) Pr4-357-Pr4-364
Mechanical behaviour of alloys containing stable or evolving heterogeneous arrangements of particlesJ. Lépinoux1 and Y. Estrin2, 3
1 Laboratoire de Thermodynamique et Physico-Chimie Métallurgique, UMR 5614 du CNRS, INPG, Domaine Universitaire de Grenoble, BP. 75, 38402 Saint-Martin-d'Hères cedex, France
2 Department of Mechanical and Materials Engineering, The University of Western Australia, Nedlands WA 6907, Australia
3 Geschäfts Führender Leiter, Institut füt Werkstoffkunde und Werkstofftechnik, Technische Universität Clausthal, Agricolastr. 6, 38678 Clausthal-Zellerfeld, Germany.
The effect of second phase particles on the deformation behaviour of a particle strengthened (e.g. oxide dispersion strengthened) alloy was studied. Instead of dealing with average characteristics of dislocation glide (such as the average mean free path), a particular distribution of particles in the glide plane was considered. A homogenisation technique based on the Delaunay triangulation was used that is considered to be a better representation of local particle arrangement than the Voronoi tessellation proposed previously. A softening effect of particle clustering was found. The method was also applied to a population of particles whose density decreases during plastic deformation due to Ostwald ripening.
© EDP Sciences 2001