Abstract
The paper analyzes the plasticity of deformed solids as a hierarchical translational-rotational system. The analysis shows that accounting for plastic rotation in addition to plastic translation, which is conventionally related to dislocation motion, radically changes the description of plasticity as a displacement gauge potential. With both deformation modes, and hence, with two-component displacements, introducing a lattice curvature and a Berry–Ishlinsky phase allows one to identify all plastic mechanisms associated with slip, twinning, lattice bending, shear and torsion, generation of nanoscale mesoscopic structural states at lattice curvature interstices and motion of point defects in their zones. Experimental evidence is presented for plastic dynamics via point-defect motion in interstitial curvature zones.
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