1st International Conference on Engineering and Applied Natural Sciences, Konya, Turkey, 10 - 13 May 2022, pp.462-466
Aluminum metal matrix composites are of great interest in many industries due to their superior strength values, low density, and high hardness properties. In the presented study, B4C reinforced aluminum metal matrix nanocomposites with different strengthening ratios (0, 1, 2, 3 and 4 weight) were prepared by powder metallurgy method. B4C and Al2024 powders were first mixed in a ball mechanical milling device at a ball: powder ratio of 10:1 for 8 hours under an argon atmosphere. The mixed powders were bulked under 500 MPa pressure by hot press method and then sintered at 560 °C for 3 hours. The compacted samples were processed in Wire EDM device under certain parameters. The surface morphologies of the samples after machining were investigated using scanning electron microscopy (SEM) and chemical analyzes of the samples were obtained using EDS. To investigate the effect of machining process on sample surfaces, surface hardness, surface roughness (SR) and metal removal rates (MRR) before and after machining were investigated. According to the results, the hardness values taken from the samples before machining are higher than after machining. The hardness of the samples decreased with machining. According to the hardness values, the highest hardness values both before and after machining were obtained from the sample containing 4% B4C by weight. Finally, with the addition of the reinforcement and the increase in the reinforcement ratio, the MRR values of all samples decreased, while the SR values increased continuously.