Experimental study and numerical analysis on dry friction and wear performance of co-continuous SiC/Fe−40Cr against SiC/2618 Al alloy composites

Abstract The dry friction and wear behaviors of co-continuous composites SiC/Fe–40Cr against SiC/Al 2618 alloy were investigated on a ring-on-ring friction and wear tester at sliding speed of 30–105 m/s under the load of 1.0–2.5 MPa. The experimental result reveals that the characteristic of two body abrasive wear and oxidation wear mechanisms are present for SiC n /2618 Al composite under higher load and sliding speed. SiC ceramic continuous network as the reinforcement can avoid composite from the third body wear that usually occurs in traditional particle reinforced composite. The mechanically mixed layer (MML) controls greatly the wear rate and friction coefficient of the composites. The composites tested at higher sliding speed exhibit higher value of friction coefficient and fluctuation, which is associated with the intermittent formation and removal of the MML. The wear and stress-strain behaviors of SiC n /Fe–40Cr against SiC n /Al 2168 at 30–105 m/s under 1.0–2.5 MPa were analyzed by finite element method with the software Solidwork2012 Simulation, respectively. The wear and stress-strain behavior of the composite predicted by the FEM correlated well with the experimental results.

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