Time features of the dynamic failure of metals attributable to the hierarchic properties of dissipative structures—cascade of failure centers

On time boundary of functional metal properties maintainance under extreme conditions

“…Density of failure centers f (t) depending on time is the order parameter at the failure threshold when the continuity of the failed body varies. Essential increase of the density of failure centers f (t) takes place at the final stage of the failure process at times t ∼ 0.9 · t r , where t r -failure duration [4].…”

“…., i.e. we have dw/dt = const; F(w, P i ), function depending on the failure rate w and pressure P i [4].…”

“…The evolution of micro-and meso-scopic defects in the phenomenon of dynamic failure is critical in the behavior of solid bodies under the effect of high-power pulses of radiation within the t ∼ 10 −6 ÷ 10 −11 longevity range (rate of temperature variation dT/dt ∼ 10 6 ÷10 12 K/s, range of initial temperatures T 0 ∼4K÷0.8T m , where T m -melting temperature) [2][3][4].…”

“…From the point of view of failure process forecast and time boundary determination for functional properties maintainance not only the final phase is of significance but the preceding history of the process [1][2][3][4] as well. Thus, acute is the investigation of the entire sequence of events preceding the threshold state as well as determination of time boundary of functional properties maintainance for a set of metals under extreme conditions.…”

“…As a rule, relaxation of highly non-equilibrium states is accompanied by dynamic destructive processes [1][2][3][4].…”