Improving the Gradient Grain Structure of Aluminum AA1050 by Punch Taken through the Sandblasted Surface

The engineering project aims to enhance the mechanical properties of aluminum alloy grade AA1050 by improving the gradient grain structure using the SMDT process. Stamping is formed by using the hydraulic machine in conjunction with mold with a punch dimension of 40 mm and taken through the sandblasted surface to have a surface roughness of 10 μm. The experiment was started by pressing the surface of the Aluminum alloy AA1050 with a force of seven tons and compressing a depth of 300 μm on the metal surface five times and rotating the workpiece 10 degrees every time the workpiece was pressed. Then aluminum alloy AA1050 was submitted to mechanical testing to compare with aluminum without the SMDT process. The average hardness of aluminum alloy AA1050 is increased from 21.69 HV to 26.47 HV and the maximum tensile strength is increased from 49.2 MPa to 6.6 MPa.