ИССЛЕДОВАНИЕ МЕХАНИЗМОВ УПРОЧНЕНИЯ В СПЛАВЕ СИСТЕМЫ Al–Mg–Si–Cu В ПРОЦЕССЕ НИЗКОТЕМПЕРАТУРНОЙ ТЕРМОМЕХАНИЧЕСКОЙ ОБРАБОТКИ

Abstract

In this work, the samples of alloy 6013 of the Al–Mg–Si–Cu system after low-temperature thermomechanical treatment (LTMT) according to the scheme: quenching → aging → deformation → aging were studied by dark-field methods of transmission electron microscopy. The analysis of the structure of precipitates of hardening phases and dislocation structure in the volume of grains after different degrees of cold hardening of LHMT is carried out. It is shown that LHMT affects the formation of the structure of hardening precipitates, contributing to both heterogeneous nucleation at dislocations and homogeneous nucleation in the bulk of grains, due to the intensification of diffusion processes.