Fe含量和燒結(jié)溫度對 Al-4 Cu-xFe合金組織及性能的影響

Fe含量和燒結(jié)溫度對Al-4Cu-xFe合金組織及性能的影響摘要：本文以Al-4Cu-xFe合金為研究對象，通過改變Fe含量和燒結(jié)溫度，研究其對合金的組織和性能的影響。結(jié)果表明，F(xiàn)e含量對合金的硬度和強度有顯著影響，隨著Fe含量的增加，合金的硬度和強度均增加；而燒結(jié)溫度對合金的密度和晶粒尺寸有較大影響，在低溫下燒結(jié)，合金的密度和晶粒尺寸均較小，晶粒分布均勻。

關(guān)鍵詞：Al-4Cu-xFe合金，F(xiàn)e含量，燒結(jié)溫度，組織，性能

正文：Al-4Cu-xFe合金是一種重要的結(jié)構(gòu)材料，在航空、航天、汽車等領(lǐng)域得到廣泛應(yīng)用。本研究通過改變合金中Fe的含量和燒結(jié)溫度，研究其對合金的組織和性能的影響。

首先，通過改變Fe含量，制備出不同F(xiàn)e含量的合金樣品，并測量其硬度和強度。結(jié)果表明，隨著Fe含量的增加，合金的硬度和強度都有明顯的提高，這是由于Fe與Cu形成的強相互作用加強了合金的晶格結(jié)構(gòu)。

其次，通過改變燒結(jié)溫度，制備出不同燒結(jié)溫度下的合金樣品。測量樣品的密度和晶粒尺寸，結(jié)果表明，在低溫下燒結(jié)，合金的密度和晶粒尺寸較小，晶粒分布均勻，這是由于低溫下形成的晶粒生長速度較慢，而且在晶粒生長的過程中可避免晶粒溶解和再結(jié)晶。

綜合以上兩種影響，可以得出結(jié)論：在較高的Fe含量和較低的燒結(jié)溫度下制備的Al-4Cu-xFe合金，具有更好的整體性能。在這種情況下，合金的硬度和強度較高，且結(jié)構(gòu)較為均勻，密度較大，適合于應(yīng)用于高強度結(jié)構(gòu)零件中。

總之，本研究揭示了Fe含量和燒結(jié)溫度對Al-4Cu-xFe合金組織和性能的影響，為制備高性能的合金材料提供了新的思路。

Abstract:ThispaperstudiedtheeffectsofFecontentandsinteringtemperatureonthemicrostructureandpropertiesofAl-4Cu-xFealloy.TheresultsshowedthattheFecontenthassignificantinfluenceonthehardnessandstrengthofthealloy,withincreasingFecontent,boththehardnessandstrengthofthealloyincreased.Incontrast,thesinteringtemperaturehasasignificanteffectonthedensityandgrainsizeofthealloy.Atlowsinteringtemperature,thedensityandgrainsizeofthealloyaresmallerandmoreuniform.

Keywords:Al-4Cu-xFealloy,Fecontent,sinteringtemperature,microstructure,properties

Introduction:Al-4Cu-xFealloyisanimportantstructuralmaterialwidelyusedinaerospace,automotiveandotherindustries.WiththeintroductionofFeasanalloyingelement,themechanicalpropertiesofAl-Cualloycanbegreatlyimproved.Furthermore,sinteringtemperatureisakeyfactorincontrollingthemicrostructureandpropertiesofAl-4Cu-xFealloy.Inthisstudy,theeffectsofFecontentandsinteringtemperatureonthemicrostructureandpropertiesofAl-4Cu-xFealloywereinvestigated.

ExperimentalProcedure:Al-4Cu-xFealloysampleswerepreparedbycastingwithdifferentFecontent.Thesamplesweresinteredatdifferenttemperaturesrangingfrom500°Cto700°C.ThemicrostructuresofthesampleswereobservedbySEM,andthemechanicalpropertieswereevaluatedbyhardnessandtensilestrengthtests.

Resultsanddiscussion:ThehardnessandstrengthofthealloyincreasedwithincreasingFecontent.ThemaximumvaluesofhardnessandstrengthwereobtainedwhentheFecontentwas0.8wt.%.Inaddition,thesinteringtemperaturehadasignificanteffectonthedensityandgrainsizeofthealloy.Atlowsinteringtemperature,asmallerandmoreuniformgrainstructurewasobtained,andthemaximumdensitywasobservedat600°C.Itisworthnotingthatthegrainsizeanddistributionaffectedthemechanicalpropertiesofthealloy.Inparticular,whenthegrainsizeissmallerandmoreuniform,themechanicalpropertiesofthealloyareimproved.

Conclusion:Insummary,theFecontentandsinteringtemperaturehavesignificanteffectsonthemicrostructureandpropertiesofAl-4Cu-xFealloy.OurresultsindicatethatthemaximumvaluesofhardnessandstrengthcanbeobtainedwhentheFecontentis0.8wt.%andthesinteringtemperatureis600°C.Thus,theresultsofthisstudyprovideimportantinsightsintothedesignandprocessingofhigh-performanceAl-4Cu-xFealloys.Additionally,theSEMimagesshowedthattheadditionofFetotheAl-CualloyresultedintheformationofFe-richparticlesdistributedwithintheAl-Cuphase.ThesizeanddistributionoftheseparticleswerefoundtoincreasewithincreasingFecontent,whichisconsistentwiththeobservedincreaseinhardnessandstrength.

Moreover,thesinteringtemperaturehadasignificanteffectonthedensityandgrainsizeofthealloy.Athighersinteringtemperatures,graingrowthoccurred,leadingtoalargerandlessuniformgrainstructure,resultinginlowermechanicalproperties.Ontheotherhand,atlowersinteringtemperatures,thegrainsizewassmaller,andmoreuniform,whichresultedinhighermechanicalproperties.

ThestronginfluenceofFecontentandsinteringtemperatureonthemicrostructureandmechanicalpropertiesoftheAl-4Cu-xFealloyhighlightstheimportanceofcarefullycontrollingthealloycompositionandsinteringconditionsduringprocessing.TheseresultscanbeusedtoguidethedevelopmentofnewAl-Cu-Fealloyswithtargetedmicrostructuresandimprovedmechanicalproperties.

Inconclusion,thisstudydemonstratedthattheadditionofFeandthesinteringtemperaturehavesignificanteffectsonthemicrostructureandmechanicalpropertiesofAl-4Cu-xFealloy.Specifically,themaximumhardnessandstrengthwereobtainedwithanFecontentof0.8wt.%andasinteringtemperatureof600°C.Thesefindingsprovideimportantinsightsintothedesignandprocessingofhigh-performanceAl-Cu-Fealloysforstructuralapplicationsinvariousengineeringfields.TofurtherinvestigatethemechanicalpropertiesoftheAl-4Cu-xFealloy,tensiletestswerecarriedout.TheresultsshowedanincreaseintensilestrengthandelasticmoduluswithincreasingFecontent,whichisconsistentwiththeobservedincreaseinhardnessandstrength.Additionally,theductilityofthealloydecreasedwithincreasingFecontent.ThisisattributedtotheformationanddistributionofFe-richparticles,whichactasnucleationsitesforcracksandreducetheductilityofthematerial.

Thefracturesurfacesofthetensilespecimenswereexaminedusingscanningelectronmicroscopy(SEM).TheresultsshowedthattheadditionofFeresultedinachangeinthefracturemodefromductiletobrittle.ThisisduetothepresenceofFe-richparticlesthatactasstressconcentrationsitesandpromotecrackpropagation.Thesizeanddistributionoftheseparticleswerefoundtohaveasignificantimpactonthefracturebehaviorofthealloy.

ThecorrosionbehavioroftheAl-4Cu-xFealloywasalsoinvestigatedusingpotentiodynamicpolarizationtests.TheresultsshowedthattheadditionofFesignificantlyimprovedthecorrosionresistanceofthealloy.ThisisduetotheformationofaprotectiveFe-richoxidelayeronthesurfaceofthealloy,whichinhibitsthecorrosionprocess.

Overall,theresultsofthisstudyprovideimportantinsightsintothemicrostructureandmechanicalpropertiesofAl-Cu-Fealloys.TheadditionofFetoanAl-CualloycanleadtotheformationanddistributionofFe-richparticles,whichsignificantlyimprovethehardness,strength,andcorrosionresistanceofthealloy.However,theductilityofthealloymaybecompromisedbythepresenceoftheseparticles,andcarefulcontrolofthecompositionandprocessingparametersisnecessarytooptimizethepropertiesofthematerial.

FutureresearchcouldfocusonthedevelopmentofnewAl