Abstract
A study of the wear resisting behavior of aluminum- and titanium-base alloys containing particles of TiC or WC introduced by the laser meltparticle injection process suggests that these materials may have significant potential for use in light-weight machinery. The carbide particles were injected, by a stream of helium gas, into shallow melt pools produced on the alloy samples as they were traversed under a multikilowatt laser beam which was focused to a diameter of about 2 mm. Repeated overlapping melt passes produced surface layers approximately 1 mm deep containing 15–65 vol.% of carbide. Ground surfaces were subjected to abrasive and particulate erosion wear testing. Kinetic coefficient of friction measurements were made on ground and polished surfaces. Sliding contact wear testing and particulate erosion testing were carried out on an aluminum alloy impregnated with TiC. Test results are correlated with carbide type, size and volume fraction.
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