icestrainbetweenreinforcementandmatrixalloy.
6.themechanicalpropertiesofcast-titaniummatrixcompositesandhigh-temperaturetitaniummatrixcompositesa
fterhot-forginghavebeeninvestigated.duetotheincorporationofinsitusynthesizedreinforcements,themechanicalpropertiesimproveobviouslycomparedwithmatrixalloy.whenthevolumeofreinforcementsis8,theyoung’smoduluse,yieldstrengths0.2andteilestrengthare131.2gpa,1243.7mpaand1329.8mpa,reectively.theyimprove19.3,47.4and45.5,reectively.thestrengtheningmechanismsincludethefollowingfactors:undertakingloadofreinforcements,refinementofgrainsizeandformationofhigh-deitydislocatio.theadditionofgraphiteformsmoreticparticleswithequiaxedornear-equiaxedshapethatisvaluabletoimprovethemechanicalpropertiesoftitaniummatrixcompositesatroomtemperature.thisisrelatedtoexistingoftibthatresultfractureofcompositesatlowlevelofaliedstrain.
7.theultimateteilemechanicalpropertiesoftitaniummatrixcompositesatelevatedtemperaturehavebeeninvestigated.theultimateteilestrengthsofinsitusynthesizedtitaniummatrixcompositesat600oc,650ocand700ocare786.1mpa,657.4mpaand564.3mpa,reectively.comparedwithimi834alloy,theultimateteilestrengthat600ocimproves23.8.astemperatureincreases,theyieldstrengthandultimatestrengthdecrease,plasticityincreases.comparedwithmatrixalloy,themechanicalpropertiesathightemperatureofinsitusynthesizedtitaniummatrixcompositesimproveobviously.theanalysisoffracturesurfacesshowthatcrackareformedduetothefractureofreinforcementsatlowtemperature,whilethecr
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