Eventos Anais de eventos
COBEF 2021
11th Brazilian Congress on Manufacturing Engineering
SURFACE HARDENING OF AL-CU ALLOY BY ELECTRICAL DISCHARGES
Submission Author:
Freddy Portillo Morales , SP
Co-Authors:
Freddy Portillo Morales, Wisley Sales, Alberto Arnaldo Raslan, fred lacerda amorim
Presenter: Freddy Portillo Morales
doi://10.26678/ABCM.COBEF2021.COB21-0267
Abstract
In the last decades the interest in improving the nonconventional methods of machining has grown, modifying them to an innovative process. The EDM process has a new emphasis on surface modification. The objective of this present study was the process of aluminum nitriding by electric discharges using the EDM machine. The nitrogen used is present in the unconventional dielectric fluid, a solution of deionized water with urea, the nitrogen source. The electrode used is electrolytic copper and as part electrode, the aluminum was used AA 2011. This process allows the implantation of nitrogen ions on the surface of the material, promoting a protective layer, against oxidation and improvement in the mechanical properties of the material. It has been proven that the influence of distortion generation on the crystalline network of the material in the process facilitates the ion exchange between the electrodes and the dielectric fluid. Thermal treatments were carried out on the samples before the application of electrical discharges, such as annealing and artificial aging, also samples were hardened with work hardening (plastic deformation). In the work hardened samples oxygen was found in the surface layer that could indicate the incorporation of t
Keywords
Surface Hardening, work hardening, nitriding, Duraluminum, EDM
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