Paper 1.4

Application of the Cluster/site Approximation to the Calculation of Multicomponent Alloy Phase Diagrams

Cao W.¹, Chang Y. A.¹, Zhu J.¹, Chen S.-L.² and Oates W. A³

¹Department of Mat. Sci. and Eng., University of Wisconsin, Madison, WI 53706, USA

²CompuTherm, LLC, 437 S. Yellowstone Drive, Madison, WI, 53719, USA

³Institute for Materials Research, University of Salford, Salford M5 4WT, UK

The cluster/site Approximation (CSA) offers computational advantages, without loss of accuracy, over the Cluster Variation Method (CVM) in the calculation of multicomponent phase diagrams. Its ease of use and advantages are illustrated in the calculation of ternary fcc ordered/disordered phase diagrams of Cu-Ag-Au. The calculated phase diagrams are in good agreement with those calculated previously by Kikuchi et al using CVM (Acta Metll., 1980, 28, 1079).

Paper 1.4

Application of the Cluster/site Approximation to the Calculation of Multicomponent Alloy Phase Diagrams

Cao W.1, Chang Y. A.1, Zhu J.1, Chen S.-L.2 and Oates W. A3

1Department of Mat. Sci. and Eng., University of Wisconsin, Madison, WI 53706, USA

2CompuTherm, LLC, 437 S. Yellowstone Drive, Madison, WI, 53719, USA

3Institute for Materials Research, University of Salford, Salford M5 4WT, UK

Cao W.¹, Chang Y. A.¹, Zhu J.¹, Chen S.-L.² and Oates W. A³

¹Department of Mat. Sci. and Eng., University of Wisconsin, Madison, WI 53706, USA

²CompuTherm, LLC, 437 S. Yellowstone Drive, Madison, WI, 53719, USA

³Institute for Materials Research, University of Salford, Salford M5 4WT, UK