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基于增强相分布均匀性的颗粒增强铝基复合材料的强化机制（英文）.docx

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基于增强相分布均匀性的颗粒增强铝基复合材料的强化机制（英文） Title:StrengtheningMechanismsofAluminum-BasedCompositeMaterialsReinforcedwithParticlesforEnhancedDistributionUniformityofIntermetallicPhases Abstract: Aluminum-basedcompositematerialsreinforcedwithparticleshavegainedsignificantattentionduetotheirexceptionalcombinationofmechanicalproperties.Thedispersionuniformityofintermetallicphaseswithinthematrixplaysacrucialroleindeterminingtheoverallperformanceofthesecomposites.Thispaperexploresthestrengtheningmechanismsofparticle-reinforcedaluminum-basedcompositesandfocusesonstrategiestoenhancetheuniformityofintermetallicphasedistribution. 1.Introduction: Particle-reinforcedaluminum-basedcompositesexhibitexcellentmechanicalproperties,suchashighstrength,stiffness,andwearresistance.However,thenon-uniformdistributionofintermetallicphaseslimitstheirfullpotential.Thispaperaimstoinvestigatethestrengtheningmechanismsthatcontributetotheenhanceddistributionuniformityofintermetallicphasesinaluminum-basedcomposites. 2.StrengtheningMechanisms: 2.1LoadTransfer: Theparticlesinthecompositeactasstresstransfermediators,enablingtheuniformdistributionofloadacrossthematrix.Thisloadtransfermechanismreduceslocalizedstressconcentrationsandimprovestheoverallmechanicalperformanceofthematerial. 2.2DislocationInteractions: Thepresenceofparticleshindersdislocationmovement,leadingtoincreaseddislocationdensityaroundthereinforcements.Theaccumulationofdislocationsenhancesthecomposite'sstrength,preventingtheformationoflargecracksandpromotingplasticdeformation. 2.3GrainRefinement: Thepresenceofparticlesrefinesthegrainstructureofthealuminummatrix.Afinergrainstructureenhancesthemechanicalpropertiesandimprovestheuniformityofintermetallicphasedistribution.Thisisachievedbyhinderingthegrowthofintermetallicphasesandpromotingtheirnucleationthroughoutthematrix. 2.4OrowanStrengthening: Particle-reinforcedcompositesexhibitOrowanstrengtheningduetotheobstaclespresentedbytheparticlestothemovingdislocations.Asdislocationsencounterparticles,theyb