Friction And Wear Properties And Applications Of The Aluminum Matrix Composites With Interpenetrating Network

The composites with3D interpenetrating networks were got more and more attentionwhich have extremely broad application. In the composites with3D interpenetrating networks,the matrix and the reinforcement were3D topological structure, it could be give full play toevery phase. At the same time, the special structure could avoid the issue that unevendistribution and anisotropic through the traditional particulate and whisker. The kinds ofcomposites which with3D interpenetrating networks were hard to fall off, it improved thewear characteristics.In the subject, the aluminum matrix of bimetal metal composites with interpenetratingnetwork which chose A390aluminum alloys as the matrix and chose304stainless wires as thereinforcement were obtained by pressure impregnation technology. By using protectiveatmosphere MMG-10tester, the dry sliding friction and wear characteristics of304stainlesssteel reinforced aluminum matrix composites with interpenetrating network under differentconnecting pressure and sliding speed were investigated. By using HX-100TM lightmicroscope and HITACHIS-2500scanning electron microscope, the microstructure and thewear surface were observed, the wear mechanism were also explored. At the same time, thewear model was established by R and nonlinear regression. It showed that the interface of thematrix and reinforcement were combined well. Based on law of curve we found that frictioncoefficient decreases with the connecting pressure increase, however, it increases with thesliding speed increases. The abrasion amount increases with the increasing of sliding speed andconnecting pressure. From the wear rate equation of composite materials, it was found that thelargest impact on wear rate was sliding speed, wear time took the second place, the smallest wasload; Theoretical values of the wear rate equation were well in accordance with experiments,the wear model which was established matched with the realistic situation of wear.The finite element model of the aluminum matrix of bimetal metal composites withinterpenetrating network was imported into ABAQUS software to carry out finite elementsimulation analysis for its process of friction, the simulation results showed that the stress isbigger in the reinforcement and at its interface where also has the higher strain value. Therealso had a sharp contour which was fitting well to the reinforcement. The stress concentrationeffect was primary cause of element failure which present to the place of reinforcement indifferent direction. Based on law of curve we found that the stress and strain increase with theincreasing of sliding speed and connecting pressure and the ability of resistance to deformationwas increased with the increasing of volume fraction of reinforcement. Through the analysis of crack propagation found that the reinforcement increase thefracture toughness property of the composite, and slow down the fatigue of the composite.