Research Progress on Stirring Friction Processing Technology and Wear Resistance of Aluminum Matrix Composites
Aluminum matrix composites has the characteristics of low density,good processing performance,and corrosion resistance,which are very important in high-performance manufacturing and widely used in fields such as aerospace and marine machinery.However,under the working conditions of reciprocating motion,the wear phenomenon between structural components has the most significant impact on the material,thereby reducing the service life of the workpiece.Therefore,improving the wear resistance of workpieces and extending their service life are of great significance for expanding the scope of use of aluminum alloys.In the process of preparing aluminum matrix composites,friction stirring processing(Friction Stir Processing,FSP)technology is one of the emerging ways of preparing composites,with excellent microstructure,not easy to produce interfacial reaction and other characteristics,which provides a huge potential in the production of aluminum matrix composites.A review of the preparation of aluminum matrix composites by FSP is conducted,focusing on the types and contents of reinforcing phases,as well as the number of stirring passes and welding parameters in FSP,and discussing the effects of the above factors on the wear-resistant properties of aluminum matrix composites.Among the factors of reinforcing phase content,the more the content leads to poorer wear resistance of aluminum matrix composites;the increase of stirring passes is conducive to grain refinement,but when the degree of grain refinement is higher,it reduces the wear resistance of aluminum matrix composites.On this basis,the mechanism to improve the wear resistance is studied.Finally,the future research trends such as the need to solve the problem of agglomeration of nanoscale reinforced phases in the preparation of aluminum matrix composites by FSP and the selection of suitable process windows for FSP are summarized and outlooked.
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