Laser surface alloying of molybdenum on aluminum for enhanced wear resistance

摘要

A continuous diode pumped ytterbium laser was used for alloying of molybdenum on Al 1100 to improve its wear resistance. Microstructural and phase analysis was conducted using scanning electron microscopy and X-ray diffraction analysis. Dry wear sliding studies using a pin on disk apparatus at room temperature under a constant normal load of 9 N indicated the increase in wear resistance of laser alloyed coatings. The enhancement in thewear resistance ismainly due to the presence of Al_8Mo_3 and Al_5Mo intermetallic phaseswithin the alloyed surface and their superior physical properties predicted by the first principle calculations.