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International Conference on Mathematical Modeling and Scientific Computing
April 2-6, 2001
Middle East Technical University and Selcuk University
Ankara and Konya, Turkey

Organizers
F. Bornemann (Munich University of Tecnology, Germany), H. Bulgak (Selcuk University, Konya, Turkey), V. Ganzha (Munich University of Technology, Germany), B. Karasozen (METU, Ankara, Turkey), A. Sinan (Selcuk University, Konya, Turkey), C. Zenger (Munich University of Technology, Germany)

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Phase Boundaries and Anisotropy via Multiple-Order-Parameter Theory for an fcc Alloy
by
G. Berensel Tanoglu
Department of Mathematics, Izmir Institute of Technology

Interphase and antiphase boundaries ( IPB and APB ) in a binary alloy on an fcc lattice are studied based on the recently developed diffuse interface model that uses three nonconserved order parameters and a concentration which is conserved order parameter. We will illustrate the ordered phases with examples based on the Cu-Au system. We investigate the interfacial properties of the IPBs by considering order-disordered transitions, an order-order transition and those of APBs in the neighborhood of the congurent and eutectoid points and away from these points. We perform numerical simulations of the interface structures for both IPBs and APBs. Realistic interfacial energy anisotropy of IPBs and APBs are calculated for different orientations and these results are compared with the results obtained from other models (CVM and the previous model). We compute the equilibrium shapes for some IPBs as well.

Date received: January 18, 2001

Copyright © 2001 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cagk-29.