All (2002-Present)  SS21  WS21  SS22  WS22  SS23  WS23  SS24

 Karl Franzens University Graz

Graz University of Technology 

Statistical Physics Modeling of Disorder in Metallic Alloys
Prof. Yong W. Kim
Department of Physics, Lehigh University, Bethlehem, Pennsylvania, USA
17:15 - 18:15 Tuesday 20 March 2018 TUG P2

The majority of metallic alloys in use are structurally disordered. Their thermophysical properties evolve on exposure to thermal, chemical, or mechanical forcing; the changes are often irreversible. A first-principle method for modeling of disorder in metallic alloys will be presented in this talk. A protocol is developed for constructing a coarse-grained alloy model that can be specialized for the evolution under thermal, stress, nuclear, or chemical forcing scenarios. We begin by asserting that a disordered binary alloy is a randomly close-packed (RCP) assembly of nanocrystallites in a glassy medium of atoms. Implementation of the protocol is discussed for thermal forcing of disordered metals; the results have been favorably compared with the known melting point data. Such a predictive capability can play a useful role in discovering new alloys for such applications as in new-generation fission and fusion reactors.