挤压态SiC_W..Al复合材料弹性模量的超声波研究

SiCW/Al,(,200030)(,150001):20vol%SiCW/6061Al,,,:;;;:TG115.28+5:A:100026656(2002)0320096203INVESTIGATIONOFTHEELASTICMODULUSOFTHESiCW/AlCOMPOSITEUNDEREXTRUDINGSTATEBYULTRASONICWAVESJIANGChuan2hai,WUJian2sheng(KeyLaboratoryforHighTemperatureMaterialsandTestsofMinistryofEducation,ShanghaiJiaotongUniversity,Shanghai200030,China)WANGDe2zun(SchoolofMaterialsScienceandEngineering,HaperbinInstituteofTechnology,Haperbin150001,China)Abstract:Theelasticmodulusofthe20vol%SiCW/6061Alcompositeunderextrudingstatewasmeasuredbyultra2sonicvelocitymethod,anditwasverifiedbyexperimentsthatthemethodwashigherinprecision.Thealignedwhiskersinthecompositeextrudedleadtothedifferenceofitsultrasonicpropertyandelasticmodulusinvariousdirections.Theul2trasonicvelocityandelasticmodulusinthewhiskerdirectionofthecompositewerehigherthanthoseinotherdirections.Theexperimentalresultsofelasticmodulusofthecompositewereclosetocalculation.Keywords:Ultrasonictesting;SiC;Composite;Elasticmodulus(SiCW/Al),[1,2],,,[3],[4],:2001201213[5],,20vol%SiCW/6061Al,11.1,,6924320023NDTVol.24No.3Mar.2002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,[6]SiCW/Al1,EE=loaloa-pla(1)loaloapla1,,(1)1.22,,,(CRT),2uhtu=2ht(2),,,(2)usulE[5](us)2=E2(1+)(3)(ul)2=E(1-)(1+)(1-2)(4)(3),(4)E=[3(ul)2-4(us)2](ul)2(us)2-1(5),,(5)2SiCW/6061Al,2SiC(vol%)20%,800,600,450,120,50mm,20mm,2mm,6mm,25,210-4s-1,10mm10mm10mm,1.6m,5mm,10MHz,33.120vol%SiCW/6061Al(SEM)3,,,,,(),,,79:SiCW/Al©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.320vol%SiCW/6061Al,3.220vol%SiCW/6061Al1(1)1,6061Al(70MPa),20vol%SiCW/6061Al231loa/MPaloa-plaE/GPa183.80.000743112.8280.20.000755106.2386.50.000797108.5482.40.000715115.2581.60.000773105.62us/ms-1ul/ms-1E/GPa139197331111.8239107315111.3339227338112.0439297351112.4539177325111.73us/ms-1ul/ms-1E/GPa13223602975.623231604576.033235605376.243229604175.953216601775.3(5),=218g/cm323,,,6061Al,[7]EE=1-tanh(ns)nsEwf+Em(1-f)(6)n=2EmEw(1+m)ln1f1/2(7)sEw,EmfmEw=450GPa,s=6.5,Em=70GPa,f=0.2,m=0.33,(6)(7)20vol%SiCW/6061Al,E=11012GPa,1,2,3.3,EE=(Ei-ŠE)2n-1(8)EiiŠEn(8)13,E=412GPa,E=0.40GPa,E=0.35GPa,,,;,;,,,,,,89:SiCW/Al©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2002(UT),(RT),(MT),(PT)(ET)()():20023523UT20024213MT200241522PT200251430RT20026419MT2002626716UT20028ET()200292002101025MT200211525UT20021220031():100():UT,RT,ET1200/:MT,PT1000/:,,,,,():100,:200437,:,:(021)65556775412,:651787952002(),:,,:(021)65556775483,:65550277,,,;,;,,,4,,20vol%SiCW/6061Al,,,:[1]HudaMD,HashmiMSJ,Ei2BaradieMA.MMCs:mate2rialsmanufacturingandmechanicalproperties[J].KeyEngineeringMaterials,1995,104-107(Part):37-64.[2]LloydDJ.Particlereinforcedaluminumandmagnesiummatrixcomposites[J].InternationalMaterialsReviews,1994,39(1):1-23.[3]ArsenaultRJ,TayaM.Thermalresidualstressinmetalmatrixcomposite[J].ActaMetall,1987,35(3):651-659.[4]PrangnellPB,DownesT,StobbsWM,etal.Thedefor2mationofdiscontinuouslyreinforcedMMCs:theinitialyieldingbehavior[J].ActaMetallMater,1994,42(10):3425-3436.[5]PapadakisEP.UltrasonicVelocityandAttenuation2Mea2surementMethodswithScientificandIndustrialApplica2tions[M].NewYork,USA:AcademicPress,1976.1285-1292.[6]NiehTG,ChellmanDJ.Modulusmeasurementsindis2continuousreinforcedAlcomposites[J].ScriptaMetal2lurgica,1984,18:925-928.[7]ClyneTW,WithersPJ.AnIntroductiontoMetalMa2trixComposites[M].NewYork,USA:CambridgeUni2versityPress,1993.20-25.9924320023NDTVol.24No.3Mar.2002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.