title: Forced chemical mixing in alloys driven by plastic deformation.
abstract: Molecular dynamics simulations of forced atomic mixing in crystalline binary alloys during plastic deformation at 100 K are performed. Nearly complete atomic mixing is observed in systems that have a large positive heat mixing and in systems with a large lattice mismatch. Only systems that contained a hard precipitate in a soft matrix do not mix. The amount of mixing is quantified by defining a mean square relative displacement of pairs of atoms, sigma(2)(R,t), that were initially separated by a distance R. Analysis of sigma(2)(R,t) and visual inspection of the displacement fields reveal that forced mixing results from dislocation glide, and that it resembles the forced mixing of a substance advected by a turbulent flow. Consideration of sigma(2)(R,t) also provides a rationalization of compositional self-organization during plastic deformation at higher temperatures.
authors.affiliation: Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 61801, USA.
authors.forename: S
authors.initials: S
authors.lastname: Odunuga
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: P
authors.initials: P
authors.lastname: Krasnochtchekov
authors.forename: P
authors.initials: P
authors.lastname: Bellon
authors.forename: R S
authors.initials: RS
authors.lastname: Averback