Iron-Added Aluminum Matrix Composites Prepared by Friction Stir Processing: Structure, Mechanical and Tribological Properties
摘要
Structural evolution, mechanical and tribological properties of an wrought Al–Mg alloy (AA5056) admixed with 5, 10 and 15 vol.% of iron powder using multi-pass friction stir processing (FSP) were studied. Homogeneous distribution of intermetallic compound (IMC) particles was achieved after 4 FSP passes that resulted in increasing the stir zone hardness and ultimate tensile stress with simultaneous loss in the ductility. The reinforcement of the aluminum alloy matrix with IMCs allowed reducing wear. Subsurface composite tribological layer was formed on the FSPed samples as a result of rubbing against a steel counterbody.