Abstract
Aluminium forged products are used in industry for both structural and non-load bearing applications. In case of structural parts, hardness is an important parameter and in non-load bearing application the surface roughness is important with respect to aesthetics. In this paper, the effect of deformation temperature on hardness and surface roughness is studied for AA 6061-T6 alloy. The samples are homogenized at 550°C for 8 hours and cylindrical billets are prepared which is forged at four different temperatures i.e. 0°C, 25°C, 100°C, and 150°C. The samples are cut in the centre and the hardness is measured along the horizontal and vertical direction away from the geometrical centre and also on the surface. Hardness variation at the top surface of the sample is observed to be less. The hardness measured on the inner surface plane is found to decrease, as we move from the geometrical centre to the surface of the billet along both horizontal and vertical direction. The surface roughness (Ra) values are found to decrease with the increase in the forging temperatures