| Institution: | 1. Laboratoire d’Electrochimie et de Corrosion, Ecole Militaire Polytechnique, BP17, BEB, 16111, Algiers, Algeria;2. Materials Engineering Laboratory, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria;3. Univ. Lille, IUT-A, Department GMP, Villeneuve D''Ascq, F-59650, France;4. Univ-Lille, Laboratoire de Génie Civil et Géo-Environnement, LGCgE-ULR4515, Lille, F-59000, France;5. Laboratoire de Génie Civil et Géo-EnvironnementLGCgE, EA4515, Faculté des Sciences Appliquées FSA Béthune, Université d′Artois, France;6. LSVRE, USTHB, BP 32, 16111, El-Alia, Algiers, Algeria |
| Abstract: | This study has been conducted to investigate the effects of plastic deformation of an AA2024 aluminium alloy by cold rolling to 25%, 50% and 75% and then heat-treating and naturally ageing for 20 days to T4 on the microstructure and the electrochemical behavior. To characterize the microstructural modifications different techniques have been applied such as X-ray Diffraction (XRD) to demonstrate the intermetallic phases formed, Optical Microscopy (OM) and Scanning Electronic Microscopy (SEM) to evaluate their microstructures and grain size. Moreover, the surface topography has been measured to establish the roughness effect on the mechanical response when subjected to tensile, fatigue and micro-indentation tests. The corrosion behaviour was evaluated by Potentiodynamic Polarization Scanning, Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The results revealed that cold-rolled samples with 50% plastic deformation show a smoother topography and exhibit the best compromise between mechanical and corrosion resistance. |
