المجلة الدولية للعلوم والتقنية

In this study, the effect of nozzle diameter is investigated experimentally on the shape and size of the AZ31 alloy powder produced via the gas atomization method. To do this, tests are carried out at a constant temperature of 790 °C, with a gas pressure of 35 bar and by applying nozzle diameter at four different values: 2,3,4,5 mm. The atomization of the melt is done with argon gas, while scanning electron microscopy (SEM) is used to determine the shape of the AZ31 powder produced, XRD and XRF analyses are applied to determine the phases generated in the internal structures of the powders produced as well as the percentages of each phase. Also, a laser-assisted measurement device is used for powder size analysis. The general appearance of the AZ31 alloy powders produced is in the form of ligament, rod, droplet, flake and spherical, and most of the powders got into flake and spherical forms depending on the increase in gas pressure. It is determined that the finest powder is obtained at a temperature of 790 °C and a gas pressure of 35 bar at a diameter of 2 mm, and that the overall powder get in form of both droplet and spherical