Study Of Al-Mn Matrix Composites Friction Behavior By Different Experimental Conditions

Hypoeutectic(content of0.97%) and hypereutectic(content of2.77%) Al-Mncomposites materials were prepared by stir casting based on Al. Microstructure byXRD analysis. Through the impact test and Brinell hardness tester to test themechanical properties of the material..Under three different conditions that dryfriction, wet friction and mixed friction weight loss by M-2000Friction and weartester. Wear scar morphology by scanning electron microscopy materials. The mainpurpose of this experiment is to provide a technical reference for Xinjiang sprinklerflow components materials.Experimental results show that composites are mainly made up of aluminumbase solid solution containing manganese, Al-Mn compounds of MnAl6andAl11Mn4phrase and Al2O3particle. Hypereutectic Al-Mn composites materials surfacedendritic segregation serious and there are more dendritic Al-Mn compound.Hypoeutectic Al-Mn composites materials surface more uniform organization. thecontent of Mn and Al2O3particles affect the level of the distribution of aluminum andmanganese compounds.Hypereutectic material harder than the Hypoeutectic material.Hypoeutectic impact toughness better than hypereutectic composite materials. Underthree experimental conditions,three materials weight loss are increasing withincreasing load,such as coefficient of friction. The same kind of load under the sameexperimental conditions, hypereutectic composites minimum weight loss, followed byhypo-eutectic composite materials, aluminum materials is the maximum weight loss.In the same kinds of loads of different experimental conditions, most of the weightloss is in the mixed friction, dry friction is the second, the wet rubbing weightlessnessis the least.Al-Mn based composite materials have different wear mechanisms underdifferent experimental conditions. Under low load conditions the primary mechanismfor the abrasive wear of friction and wear, with increasing load, the material wear is adhesive wear. Dry friction at low loads, shiny surface, shallow furrow, under highload conditions, the surface of the laminate was dropped, black surface, groove depthplow. Wet friction at low load, the surface corrosion pits, shallow furrow, under highload conditions, the width of the surface and deep furrows, flaky debris. Wear scarmorphology under mixing conditions: layer and etching the etch pits can be clearlyseen in the low load, at high loads, more material peeling, grinding marks apparentwidening deepened furrow.