Abstract
n this work the peculiarities of formation ultrathingrained structure and regularities of mechanical properties improvement of aluminum alloy AMЦ, processed by equal channel angular pressing (ECAP). A systematic study of changes in the structure and mechanical characteristics (microhardness and wear resistance) of the AMЦ aluminum alloy, depending on the number of passes and the angle between the pressing channels at the ECAP. The work shows that by varying the number of passes, different grain sizes and different values of mechanical characteristics can be obtained. It was found that with a decrease in grain size, the microhardness of the AMЦ alloy increases by 4.5 times compared to the initial state. It is shown that after ECAP-12, the mass loss decreases, which shows an increase in the wear resistance of the AMЦ alloy by 13–14%. It was identified that after the ECAP of the AMЦ, the strength characteristics increase, and the plasticity decreases when the transition to the ultrathingrained state.