The Effect of Multiple Forging and Cold Rolling on Bending and Tensile Behavior of Al 7075 Alloy
This work studies the effect of multiple forging (MF), followed by cold rolling, on the tensile and bending behavior of Al 7075 alloy. The raw material was received as a rod shape. The specimens were subsequently cut and annealed at 450 °C for 30 minutes. The cylindrical specimens were subjected to MF at 250°C for three passes, then the bulk of multiple forging specimens were faced rolling at room temperature. Three different base materials were tested, raw material (as received then annealed), MF material, and rolled sheet. Hardness test, tensile test, and bending test were carried out in order to measure the mechanical properties, which are affected by the MF and cold rolling. It has been proved that the MF base specimens have higher tensile strength and better maximum elongation comparing with the raw material specimens. Rolled sheets specimens have got the highest tensile strength and lowest ductility. The result of bending test was similar to the tensile test results, beside these mechanical tests some metallographic samples were performed to help finding an explanation of this properties change.
T. Berecz, K. Májlinger, I. N. Orbulov and P. J. Szabó
T. S. B. Naser and G. Krállics, "The Effect of Multiple Forging and Cold Rolling on Bending and Tensile Behavior of Al 7075 Alloy", Materials Science Forum, Vol. 729, pp. 464-469, 2013