The effect of surface temperature and particle size on mechanical properties during accumulative roll bonding of Al 1050-H4 aluminum alloy

the effect of surface temperature and particle size on mechanical properties (hardness) of AL 1050-H4 alloy strip of 1.6mm thickness, 25mm width and 1250mm length have been investigated in this paper. The research focus on the influence of surface temperature of nanomaterials during grain refinement by accumulative roll bonding (ARB) at room temperature of 24°c. The material thickness was reduced by 49% for the first pass and the temperature measured on the surface was 27.2°c. For the second pass the thickness was reduced by 50% with a temperature of 29.5°c. Deformed samples were observed with light polarized microscope (LPM). Micro-hardness test was performed on rolled samples as well as on parent sample. It was observed that particles sizes decrease on the first pass where the surface temperature 27.2°c and Start to grow on second pass of ARB process when the surface temperature continuously increases. High material hardness was observed where the particle sizes are small and start to decrease when the material experience particle growth due to increase in temperature.