Dry friction and wear behavior of in-situ Al/Al3Ti composite

Effects of different volume fractions of reinforcement and various loads applied in wear testing on dry tribological behavior of Al-Al3Ti in-situ composite were investigated. Mixture of aluminum and different amount of titanium powders has been compacted and combustion synthesized to obtain Al-Al3Ti composite with different percent of reinforcements. The results of pin-on-disk wear tests indicated that addition of Al3Ti to aluminum matrix increase wear resistance of the composite samples by 4 times compared to that of pure aluminum. In addition, presence of Al3Ti reinforcement reduced friction coefficient of the composites. Oxidation/abrasive mechanism was revealed to be dominant on wear behavior of Al-Al3Ti composites; adhesive wear decreased as volume fraction of the intermetallic increased in the composites.