CHANGES IN THE MECHANICAL PROPERTIES OF AL-10SI-MG ALLOY SAMPLES UNDER THE INFLUENCE OF A PULSED MAGNETIC FIELD OBTAINED USING SELECTIVE LASER SINTERING

10.25712/ASTU.1811-1416.2025.04.010

Abstract

The relevance of the study is related to ensuring the mechanical properties of aluminum alloy samples obtained by selective laser fusion. Plates with a thickness of about 1 mm were obtained from Al-10Si-Mg (RS300) powder aluminum alloy, and magnetic pulse treatment with a current strength of 11...21 kA was performed. The assumption has been experimentally confirmed that whirl currents of several tens of kiloampers are induced in samples under the influence of impulse magnet field, causing uneven heat generation across the sample material due to a higher level of electrical resistance along the grain boundary. That leads to an instantaneous local release of heat, which can lead to micro-melting of the material along the boundaries of metal powder composition’ particles. This can probably lead to a change in the metal bonds between the particles, which in general should lead to an increase in the mechanical properties of the product. Uniaxial tensile test, microhardness measurements and metallographic studies were performed, which showed a change in the grain boundary structure and an increase in the mechanical properties of the material by 20-30%. The directions of further research have been determined to explain the changes in mechanical properties after exposure to an aluminum alloy by a pulsed magnetic field.