Microstructure and mechanical properties of dispersion-strengthened aluminum-magnesium alloys obtained using ultrasonic treatment of melt

The paper present a study on alloys of the Al-Mg system (5–6 wt%) strengthened with nonmetallic nano- and microparticles such as nanodiamond, TiB2 and their combination. The introduction of nonmetallic particles into the Al-Mg melt was carried out using master-alloys, a mechanical mixer and simultaneous ultrasonic treatment of the melt. In addition, when casting into the chill mold, the melt was subjected to vibration treatment before solidification. The castings obtained were transformed into sheets with a thickness of up to 10 mm by hot rolling. The structure of the alloys obtained in the cast state and after deformation treatment of both initial (without particles) and containing nanoparticles was studied using metallography methods, i.e. optical and scanning electron microscopy. Analysis of the mechanical properties of the alloys under loading was carried out. Vickers microhardness and Brinell hardness were also studied