| Abstrakt: |
This study explores the impact of friction stir processing (FSP) on the microstructure, hardness, tensile strength and wear characteristics of 7075-T651 Al alloy. FSP was performed using different parameters such as several tool rotational speeds (1100, 1860, and 2270 rpm), various travel speeds (18, 45, and 65 mm/min), with a constant tilt angle of 1°. All experiments were performed utilizing a non- consumable tool with threaded pin profile. Tensile and hardness tests were achieved by utilizing a universal tensile testing machine and a digital microhardness tester, respectively. Different applied loads were used to evaluate the wear behavior under dry sliding condition utilizing a pin on disc wear device. The results revealed that the microstructure was significantly refined in the stir zone. The hardness values distribution results showed higher values in the stir zone and gradually diminished towards the region not affected by FSP. Tensile test results pointed out a decrease in the tensile characteristics of the FSPed samples in contrast with the base metal. Furthermore, disturbance in tensile test results in FSPed specimens has been identified depending on the tool rotational speed and travel speeds used. The results also showed lower wear rates for the FSPed samples contrasted with the base metal. [ABSTRACT FROM AUTHOR] |
