Aluminum and its alloys are the most consumable non-ferrous metals. The 5086 aluminum alloy enjoys a vast variety of properties including low price, high strength to weight ratio, high fatigue strength; excellent corrosion resistance against salt water, good ductility and good weldability while non-heat treatable. The severe plastic deformation (SPD) processes are basically applied for the large strain to solid bulk materials without significant changes in specimen’s overall dimensions. Among different SPD techniques, Equal Channel Angular Pressing has attracted most attentions, because of manufacturing commercial capability, and industrial facilities. In this research, ECAP process up to 10 passes was carried out on a rolled 5086 Al-Mg alloy with different routes of A and Bc in the ECAP die with ? = 120 o at 150 o C. Tensile and hardness tests were performed. In order to clarify the failure mode, fracture surfaces of tensile test were observed by Scanning Electron Microscopy (SEM). Moreover, X-ray diffraction (XRD) system was utilized to investigate the texture variations using for calculating the texture parameters and comparing the X-ray diffraction patterns of samples. The microstructures were evaluated with SEM equipped by EBSD system. The results showed that the hardness was increased significantly in initial passes. Also, with increasing the number of passes, increasing rate of hardness decreased. The same trend was observed in tensile strengths. It was observed that at first stages of ECAP process, Sample’s Elongations strongly decreased from 34.7 to 22.4 percent and in next passes, the rate was decreased. Fractographic observations showed that the number of dimples were increased with increasing the number of passes. Texture study of samples showed that (220) planes were as predominant texture by ECAP process. It was believed that according to the results, the ECAPed samples for 4 passes with route Bc, hardness of 111 HV, 337 MPa tensile strength and elongation of 21% had the most favorable mechanical properties and microstructures. Keywords: 5086 Al-Mg, Sever Plastic Deformation, ECAP, Hardness, Tensile Strength, Fractography, Texture, Microstructure
