Papers › On the temperature and density dependence of dislocation drag from phonon wind

On the temperature and density dependence of dislocation drag from phonon wind

17 Apr 2021arXiv:2104.08650links table onlyarchive 2025-07-28

Daniel N. Blaschke, Leonid Burakovsky, Dean L. Preston

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At extreme strain rates, where fast moving dislocations govern plastic deformation, anharmonic phonon scattering imparts a drag force on the dislocations. In this paper, we present calculations of the dislocation drag coefficients of aluminum and copper as functions of temperature and density. We discuss the sensitivity of the drag coefficients to changes in the third-order elastic constants with temperature and density.

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