Aşırı plastik deformasyon uygulanmış alüminyum alaşımının çok yönlü dövme sonrası mekanik davranışının incelenmesi.

Aluminum alloys are widely used for lightweight applications. Severe plastic deformation has recently emerged as a versatile method to deliver large strains and thereby improve mechanical properties. Among these methods, it is seen that the versatile forging (MAF) process stands out in terms of its industrial applicability. In particular, it has been determined that the strength of some metals is significantly increased by the warm or hot forging process. In this study, the mechanical properties of Al 6061 alloy, which is frequently used in the automotive and aviation industries, were improved by the multi-axial forging method and its behavior was characterized. For this, 3, 6, 9 and 12 pass forging processes were carried out at 200 °C temperature by designing an experiment. The Split Hopkinson Pressure Bar assembly was designed and built to analyze the mechanical behavior after application. As a result of the tests, it was determined that the yield, tensile and hardness values of the Al alloys forged with the multiaxial forging method increased up to a certain cycle, and the grain structures were reduced in the microstructure examinations. In the aluminum 6xxx alloys used in this study, because of 6 passes forging, the hardness value was 80 HB, yield strength was 245 MPa, and tensile strength was 270 MPa, while the average grain size was 8.32µm. As a result of 9 passes of forging of the same alloy, the hardness, yield, and tensile values decreased compared to 6 passes of forging, while the grain size increased, the values are 73HB, 212 MPa, 232 MPa and 11.54µm, respectively. Similar results were obtained in the SHPB test, which is a dynamic crash test, and it was determined that the mechanical properties of the Aluminum 6xxx series alloys were improved by the multi-axial forging method.