Effect Of Friction Stir Processing On Mechanical Properties And Microstructure Of The Cast Pure Aluminum

Abstract Friction stir processing FSP has the potential for locally enhancing the properties of pure AL. A cylindrical tool with threaded pin was used. the effect of FSP has been examined on sand casting hypereutectic pure AL. The influence of different processing parameters has been investigated at a fundamental level. Effect of FSP parameters such as transverse speed 86189393 mmmin rotational speed 560710 900 rpm on microstructure and mechanical properties were studied. Different mechanical tests were conducted such as tensile microhardness and impact tests. Temperature distribution has been investigated by using infrared IR camera the thermal images were analyzed to point out the temperature degree on limited points. The results show that the heat generation increase when rotational speed increase and decrease when transverse speed increase. Hardness and impact measurements were taken across the process zone PZ and tensile testing were carried out at room temperatures. After FSP the microstructure of the cast pure Al was greatly refined. However FSP caused very little changes to the hardness of the material while tensile and impact properties were greatly improved.