Defect induced structural-scaling transitions and shock waves evolution in large range of strain rates (experimental and theoretical study)

Statistically based phenomenology allowed formulation of thermodynamic potential and constitutive equations to establish link of defect induced structural-scaling transition, plastic flow and damage-failure transition. Relaxation properties of metals in strain rate range 10$^{3}$ 10$^{10}$s$^{-1}$ were analyzed that allowed interpretation: (i) self-similarity of shock wave profile for different stress amplitudes, mechanism of generation of second ``elastic precursor'' under reloading tests; (ii) mechanism of transition from thermally activated dislocation glide to regime of steady-state plastic wave and overdriven shock. Comparison of MTS-PTW and statistically based models allowed link hardening law, saturation stress and yield stress in thermal activation regime with non-linearity of thermodynamic potential, to propose interpretation of ``singularity gap'' between thermally activated dislocation glide and overdriven-shock regimes. Using 3D New View profilometry data correspondence of defect induced relaxation properties and multiscale correlation in defects ensemble was established for vanadium recovered specimens subject to quasi-static, dynamic and plate impact tests.