10Cr9Mo1VNbN耐热钢的动态断裂韧度研究

33219992JOURNALOFXIANJIAOTONGUNIVERSITYVol.332Feb.199910Cr9Mo1VNbN,,,(,710049,):,10Cr9Mo1VNbN77923K.:10Cr9Mo1VNbN,;,,.,,..:;;:TG113.2StudyonDynamicFractureToughnessof10Cr9Mo1VNbNHeat2ResistantSteelZhuLihui,ZhaoQinxin,GuHaicheng,LuYansun(XianJiaotongUniversity,Xian710049,China)Abstract:Impactresistanceanddynamicfracturetoughnessof10Cr9Mo1VNbNsteelisinvestigatedusinginstrumentedimpactmachineoverabroadrangeoftemperaturesfrom77Kto923K.Resultsshowthatnearlyalloftheimpactenergyisconsumedforcrackinitiationinthelowershelfrange.Intheductile2to2brittletransitionregionanduppershelfrange,theenergyconsumedduringcrackpropa2gationismuchhigherthanthatduringinitiation.DynamicfracturetoughnessKId,whichcanbefoundfrominstrumentedimpacttestofPCVNspecimens,reflectsbrittlebehaviorof10Cr9Mo1VNbNsteelbeingmoresensitivethanimpactresistance.ThechangeofKIdisassociatedwiththatofstretchedzonewidth,initiationzonewidthanddimplesize.Keywords:heat2resistantsteel;impactresistance;dymamicfracturetoughness,,,833853K;,,,,.,,,.10Cr9Mo1VNbN,893K,TP304H.:1998O01O19.:,,19712,,.,10Cr9Mo1VNbN,,.KIc.,KIc.10Cr9Mo1VNbN300mmKIc,.JIcCOD(CracktipOpenDisplacement),.70,KIc.,(ASTM),.,,.,,[15].,,O,,.,10Cr9Mo1VNbN77923K,.110Cr9Mo1VNbN,1.,13131333K,10331053K,.,76mm14mm,.,2mm,RoellAmslerHFP5100,Wa(a/W)015.JBC-300,OO.77K923K,,,.JSM-840.110Cr9Mo1VNbN(%)C0.10Mn0.465P0.010S0.010Si0.36Cr8.77Mo0.925V0.21Nb0.091N0.049Ni0.10Al0.04Cu0.1222.1PePgyPmPf.,EeEiEpEt(Et=Ei+Ep).110Cr9Mo1VNbNT=77923K,EeEiEpEtT.,,.,EpEt,,.,,.1EeEiEpEt.T=77K,2433,.T153K,;,,.T195K,,,.T233K,,+.,.,T=673K,10Cr9Mo1VNbN,.T=873K,,.2.2.T=195K,,.KId,,.GhoneimHammad(Pgy+Pm2)[1],KIdKId=PmBW1/2f(a/W)(1)JId=2EaB(W-a)(2)KId=(EJId1-v2)1/2(3)B;W;a;v;E;EaServer[6].JIdKId2.,KId1,,KId473K923K..KId:,,,..T=77K,,,.T=195K,,,+.T=253K,,,,.,,10Cr9Mo1VNbN,,,,..T=473K,,.T=923K,10Cr9Mo1VNbN.,,,,.T=473K923K,735550m.KId2,3.2JIdKId(T=195923K)342,:10Cr9Mo1VNbN(a)T=77K(b)T=195K(c)(d)T=923K3KId;,.,KId.,9CrO1Mo.9CrO1Mo,JIcCOD[1,7,8,9],,2.29CrO1MoT/KJ1d,J1c/kJm-2K1d/MPam1/219524.725383.6142.829899.5154.3373100.7151.947381.7133.6[7]29885.5[8]36696.647877.9[1]26874.410Cr9Mo1VNbN,.,.3(1)10Cr9Mo1VNbN,,.,77923K,+.(2),,.,KId.:[1]SreenivasanPR,MoitraA,RaySk,etal.Dynamicfracturetoughnesspropertiesofa9Cr21Moweldfromin2strumentedimpactanddrop2weighttests.InternationalJournalofPressureVessel&Piping,1996,69(2):149159.[2]GhoneimMM,NasreldinAM,ElsayedAA,etal.In2strumentedimpactpropertiesofsomeadvancednuclearreactorpressurevesselsteels.JournalofMaterialsEngi24433neeringandPerformance,1996,5(3):328334.[3]DrarH.Fractographicaspectsofbluntingathighloadingrate.EngFractMech,1996,53(1):3747.[4]LinazaMA,Rodriguez2IbaueJM,UrcolaJJ,etal.Comparisonbetweenbrittlefracturemicromechanismsat77Kinprecrackedspecimensandinnotchedspecimens.InternationalJournalofFracture,1995,70:R3R10.[5]GhoneimMM,HammadFH.Instrumentedimpacttestingofanirradiated20MnMoNi55PVSweldmateri2al.JournalofNuclearMaterials,1992,186:196202.[6]ServerWL.Impactthree2pointbendtestingfornotchedandprecrackedspecimens.JournalofTestingandEvalu2ation,1978,6(1):2934.[7]JamesLA,CarlsonKW.Thefatigue2crackgrowthandductilefracturetoughnessbehaviorofASTMA387Grade91steel.JournalofPressureVesselTechnology,1985,107(3):271278.[8]HuangFH,GellesDS.FracturebehviorofunirradiatedHT29andmodified9Cr21Mowelds.In:JWDavisD,JMichel.TopicalConferenceonFerriticAlloysforUseinNuclearEnergyTechnologies.Pennsylvania:TheMetal2lurgicalSocietyofAIME,1984.337346.[9]YamamotoY,SeoS.Manufactureandpropertiesofmodified9Cr21Mosteelforgingsforvalvebodiesinultrasupercriticalpowerplants.TheThermalandNuclearPower(inJapanese),1995,46(464):4251.()(40)(2)SiO2O,.(3),,.:[1]PhaeaohMW,DanielAM,LewisMH.Stabilityofin2terfacesincalciumaluminosilicateematrix/nicalonSiCfi2brecomposites.JMaterSciLett,1993,12(13):9981001.[2],,,..,1997,31(1):97102.[3]BrennanJJ.Tailoringmultiphaseandcompositeceram2ics.MaterSciRes,1986,20(3):548560.[4]BonneyLA,CooperRF.Reaction2layerinterfaceinin2terfaceinSiC2fiber2reinforcedglass2ceramics:ahigh2reso2lutionscanningtransmissionelectronmicroscopyanalysis.JAmCeramSoc,1990,73(10):29162921.[5]CooperRF,ChyungK.Structureandchemistryoffiber2matrixinterfacesinsiliconcarbidefiber2reinforcedglass2ceramiccomposites:anelectronmicroscopystrudy.JMaterSci,1987,22(9):31483160.()542,:10Cr9Mo1VNbN