Abstract
A new method for preparing composite materials on metal surfaces by injecting high-speed solid particles is proposed. High-speed 316L stainless steel particles accelerated using high-pressure nitrogen in a de Laval nozzle were injected into an aluminum surface to form an Al/316L composite surface without the buildup of a coating. The acceleration and injection processes of the 316L particles were simulated. The injection and deposition behaviors of the 316L stainless steel particles on the aluminum substrate were investigated. The compressive stress strengthening induced by the tamping effect was also studied. It was shown that the strengthening of the Al/316L composite surface achieved via both shot peening and the metal matrix composites, known as the double-strengthening effect, significantly improved the wear resistance of the aluminum substrate. In addition, the introduction of beneficial compressive residual stress on the surface of the material was shown to effectively improve the anti-adhesive wear and fatigue wear resistance.
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