Nagicheva G.S.1, Nokhrin N.V.1, Melekhin N.V.1, Berendeev N.N.1, Bragov A.M.1, Balandin V.V.1, Sysoev A.N.1, Gryaznov M.Y.1, Gundorin V.V.2, Kurepin S.A.2, Smirnov A.S.2
1Lobachevsky University of Nizhny Novgorod, Nizhny Novgorod, Russia
2V.V. Bakhirev Institute of Mechanical Engineering, JSC,Dzerzhinsk, Nizhny Novgorod region, Russia
Email: nagichevags@gmail.com
The tendency of the samples of the carbon steel U8 after (i) dynamic compression, which has been executed by throwing a steel flat striker by means of a gas gun, (ii) explosive processing of a cylindrical workpiece and quasistatic compression to strain aging has been investigated. The Finite Element Method with the application of the Johnson-Cook model has been utilized to estimate the strain after dynamic loading. The scale of strain aging has been determined from the change in the microhardness (Δ Hv) of the steel after annealing in the temperature range of 150-500oC, likewise from the change in the highest of the Snoek-Koester peak on the temperature curve of internal friction. It has been demonstrated that the maximum scale of strain aging is observed after dynamic compression. Keywords: carbon steel, pearlite, strain aging, dynamic loading, Johnson-Cook model.
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