Open AccessComputer simulations of hydrostatic pressure influence on screw <a> dislocation slip in Mg
Author(s) -
Andriy Ostapovets,
O. Vatazhuk
Publication year - 2020
Publication title -
vìsnik harkìvsʹkogo nacìonalʹnogo unìversitetu ìmenì v.n. karazìna
Language(s) - English
Resource type - Journals
ISSN - 2073-3771
DOI - 10.26565/2222-5617-2020-33-04
Subject(s) - hydrostatic pressure , dislocation , materials science , slip (aerodynamics) , hydrostatic equilibrium , shear (geology) , peierls stress , shear stress , critical resolved shear stress , hydrostatic stress , dislocation creep , mechanics , composite material , thermodynamics , physics , shear rate , finite element method , quantum mechanics , viscosity
Atomistic modeling of hydrostatic pressure influence on critical resolved shear stress was performed for glide of screw dislocation in magnesium. It was found that application of pressure can change the resolved critical stress for basal and prismatic slip. The effect is dependent on dislocation core structure. It can be connected to the pressure dependence transient dilatation of the dislocation core.