Energy accumulation and dissipation in metals as a result of structural-scaling transitions in a mesodefect ensemble

Elastic-plastic transition in iron: Structural and thermodynamic features

“…The form of this dependence can be deter mined by the following two independent methods: by solving the statistical problem of the evolution of an ensemble of mesodefects in a solid body and by pro cessing infrared scanning data. The statistical problem of the evolution of an ensemble of microshears in a material was solved in [2] with allowance for the non local effects in an ensemble of mesodefects. When analyzing the self similar solutions to the defining relationships in combination with infrared scanning data, we were able to propose a procedure for estimat ing the nonlocality constants in the expansion of the free energy of the system in terms of an order parame ter (structural strain) and to numerically simulate the propagation of heat waves.…”

“…In this work, we continue the study of the energy dissipation [1,2] during the elastic-plastic transition by infrared scanning. We determine the main thermo physical features of this transition at various strain rates and study the temperature kinetics of the sample and the dependence of the heat wave velocity on the number of waves and the strain rate.…”

“…The thermodynamic and mechanical features of the elastic-plastic transition were studied in [1][2][3][4][5][6][7]. In [1], we proposed a method to estimate the energy stor age rate in a material using the results of infrared scan ning.…”

“…In [1], we proposed a method to estimate the energy stor age rate in a material using the results of infrared scan ning. In [2], this process was considered from the for mal points of the mechanics of continua using an additionally introduced structure sensitive tensor variable, which describes the growth of mesoscopic defects. The wave character of heat dissipation in steel during the elastic-plastic transition was first experi mentally detected in [3].…”

“…As a result, the most impor tant sign of a plastic flow was found to be the localiza tion of plastic deformation, which is accompanied by the localization and intensification of heat sources in a material. When calculating the intensity of heat sources in a material and determining the total energy consumed for its deformation, one can perform an integral estimation of the energy stored in an ensemble of mesodefects in order to determine the current stage of its evolution.The thermodynamic and mechanical features of the elastic-plastic transition were studied in [1][2][3][4][5][6][7]. In [1], we proposed a method to estimate the energy stor age rate in a material using the results of infrared scan ning.…”