Secondary Phase Refinement in Molten Aluminum via Low Power Electric Current Processing

Metal matrix compositesMetal matrix composites offer improved mechanical propertiesMechanical properties at reduced weight compared to monolithic alloys. The reinforcing capabilities of the particulate are dependent on their size, distribution, and bonding with the matrix. The intermetallic compound, Al3Ti, has excellent bonding with the surrounding matrix but can grow detrimentally large with extended hold times in the molten state. In addition, passing electrical current at low power levels through the meltMelt has been found to reduceReduce the size of the Al–Ti intermetallic phase. This research focuses on the novel processingProcessing method of passing an electric current through molten aluminum alloyAluminum alloys to refine the reinforcing secondary phase. This technique could have broad impacts on particulate refinement in multiple metal matrix compositeMetal matrix composites systems.