Study of strain localization and energy dissipation in metals based on infrared thermography

Abstract

This work is devoted to theoretical and experimental study of energy balance in titanium alloys under plastic deformation and failure. It is shown that infrared thermography can give a unique opportunity to investigate the thermodynamics of plastic deformation and failure of metals. The energy balance in titanium alloy OT-4 was studied in smooth samples under quasi-static loading and at fatigue crack tip under crack propagation. Extending previous results of the research group in Perm, we coupled the experimental investigation of temperature evolution with a statistical description of the mesodefect ensemble. It allowed us to propose a thermodynamic internal variable model of heat dissipation in metals.