Aminnudin Aminnudin, Harliadi Ilham, Yanuar Rohmat Aji Pradana
Metal Matrix Composites are consisting of two or more materials which these materials still can be identified clearly. MMC with brass as the matrix and fly ash has mechanical properties higher than brass. Machining of the MMC with Electro-Chemical Machining (ECM) needs suitable parameters one of them is electric current. In-proper electric current will make machining time too long or the surface roughness of workpiece does not comply with the standard. The purpose of this study was to determine the effect of current strength parameters on MRR and surface roughness MMC material with the ECM process. The current used are 1, 1.5, and 2 A, the electrode made form brass with a diameter of 19. The workpiece size is 20x20 mm and its thickness is 10 mm. The highest MRR results were obtained at 2 A current strength variation with a value of 0.000124 mm3/min, while the lowest MRR value was obtained at 1A current strength variation with an MRR value of 0.000045 mm^3/min. The application of the current strength variation shows the highest Ra value when 1 A current is applied, which is 1.83 m, when the current is increased to 1.5 A, the Ra value decreases to 1.316 m. The lowest value of Ra is when the current is increased to 2 A with a value of 0.51 µm. © 2023 American Institute of Physics Inc.. All rights reserved.
Department of Mechanical Engineering, Universitas Negeri Malang, Jl. Semarang no 5, Malang, Indonesia