A Study on the Deformation Behavior of AA7075 Powder with Three-Dimensional Ball Mill

Abstract

Aluminum-based composite materials are frequently preferred in many new-generation engineering applications due to their high strength, wear and corrosion resistance, improvement of mechanical properties, machinability, and low density. Mechanical alloying has an important place in the production of composites with high properties in powder metallurgy, which is one of the composite material production methods. In this study, the deformation of AA7075 powder was investigated with a three-dimensional ball mill designed and produced for use in mechanical alloying processes. Three different rotational speeds (150, 200, 250 RPM), three different b all to powder ratios (1:5, 1:10, 1:20) and three different milling times (30, 60, 90 min) in the milling processes. Deformations in the powders were evaluated by particle size analysis and powder structure examination. The obtained results were analyzed with analysis of variance, regression method, three-dimensional graphics, optical microscope and Scanning Electron Microscope images. When the results are examined, the maximum deformation and powder size among the selected experimental parameters were realized at 150 RPM rotational speed, 1:20 ball to powder ratio, and 90 min.