Ti_Al_Zr钛合金锻材的断裂韧度测定及分析

NuclearPowerEngineering245200310Vol.24.No.5Oct.20030258-0926(2003)05-0439-06Ti-Al-Zr111221.4000302.610041Ti-Al-ZrGB4161-84KICGB/T2358-94(COD)6R(0=Δa)cKICSEMTL111.8A1-Ti-6Al-4V[1]KICKQPQ(CODKQ)[2]KICGB2358-94P-VCOD(aΔ=0)KIC2750α-Ti25×50×300mm2.1AlZr()12.21α-Ti1wt%Table1ChemicalCompositionofTestingMaterialwt%VFeSiCNHO0.010.020.040.0150.010.0020.052001-01-18(99JS85.6.1.JW2004)Vol.24.No.5.2003440hcp[3]YB27-64[4]5~62.322Table2MechanicalPropertiesofTestingMaterial/b/MPa0.2/MPaE/GPa/%/%ak/Jcm220555415106.722530.307533.12Ey/s0.003(y0.2)GB/T2358-940.00500.0057(B=75mm)B75mmB=25mmGB4161-84KICCODB20mm100HFP5000(6.5kN1.5kN100Hz)0a=0.5W,WINSTRAN1332(1.5mm5mmINSTRAN)X-YP-V3.2GB4161-84P-VPmaxPQaB/4B/23B/42a3a4aa33.3KQ⎪⎭⎪⎬⎫≥≤2QQmax)/(5.210.1/yKBPPs(1)KQ=KIC3Pmax/PQ=1.24(1.10)B(1)BKQKQ=91.2)mMPa(21⋅KICBKICBBKIC[5]KIC91.2)mMPa(21⋅3B120.74mm[6]B≥120.74mmCOD4COD4.1GB/T2358-943KICTable3ResultofKICTest/mmPmax/kNPQ/kN0.2/MPaa1a2a3a4a53432aaaa++=/mm42.534.341520.4920.9221.4121.0120.321.11Wa0.9a/mm)(WaYQPPmax/mm)(5.222.0ICsK%/3minmax4.3.24.3.2aa-0.53019.010.6281.24120.742.32)mMPa(2121⋅⎟⎟⎠⎞⎜⎜⎝⎛=WaYBWPKqQ91.2KICeffectnessTi-Al-Zr441B×W×S10×20×100mm()100HFP5000(4.3kN0.7kN100Hz60mma0=0.4W)INSTRANLZ3-204P-V10P-V4.2dR6P-VPVpGB/T2358-949ai(i=1239))2(8182009010∑=++=iiaaaa(2))2(818291∑=++=iiaaaa(3)0aaa-=Δ64[7]4.2.1()4Table4ExperimentDataP()Vtotal/mmVP/mma0/mmΔa/mm19.3370.5120.3018.3871.026028.8270.2310.0617.6410.0907410.6940.5700.3358.1300.95459.3250.3490.1358.4130.265610.4080.5100.3147.8300.867711.1730.4840.2687.9030.618ZaaWrVaWrEKy++--+-=00pp0p22I)()(2)1(smd(4)pr)1(4.0pa-=r3=0.1pr=0.44KIIMPam1/2KI=YP/[BW1/2]Y(0a/W)ZmmWmm(4)d=de+dp(5)655CODTable5ResultofCODeffectivedata(I)W/mmY(a0/W)KI/MPam1/2dp/mmde/mmd/mm120.0308.97058.4940.1030.0350.138220.0007.57049.3180.0230.0250.048420.0208.07061.7960.1180.0390.157520.0408.39055.0620.0460.0310.077620.0207.75057.0090.1150.0330.148720.0107.84061.9270.0970.0390.136P()Vpa0Δa445dR2Δadd=0.1081Δa+0.0485(6)4.2.2(dc)CCVZaaWraWr⋅++--=)()(d(7)WmmammZ1.52mmr(1/3)Vcmm6Vol.24.No.5.2003442dR(3)Δad6CODTable6ResultofCODRffectiveDataV/mma0/mmΔa/mmW/mmd/mm10.5128.3871.02620.0300.14420.2317.6410.09120.0000.07240.5708.1300.95420.0200.16650.3498.4130.26520.0400.09860.5107.8300.86720.0200.15570.4847.9030.61820.0100.145d=0.0891Δa+0.0732(8)4.3KICdRΔaddKICSCnEKsmd2IC2)1(⋅-=(9)n1≤n≤1.52.0n=1n=2[8]n=1dc(9)C2IC1dms⋅-=SnEK(10)Δa=0(6)dC=0.485mm21ICmMPa58.48⋅=KΔa=0(8)dC=0.0732mm21ICmMPa68.59⋅=KKICKQ(91.2MPa21m)5SEM6#SEM4(45)(6)SEM[9]Ti-Al-Zr44362COD[12]KIC7(1)dRd=0.1081Δa+0.0485(2)dRd=0.1081Δa+0.0732(3)Δa=048.58MPa21m59.65MPa21m[1]TakaoHoriy,TeruoKishi.RelationshipBetweenFractureToughnessandCrackExtensionResistanceCurve(RCurves)forTi-6Al-4VAlloys[J].MetallurgicalandMa-terialsTransactions,1998,29:781.[2]ChengYan,Yin-Winganai.NumericalInvestigationonStabreCrackGrowthinPlaneStrees[J].InternationalJournalofFracture,1998,91(2):117130.[3]TanX,GuH.CyclicDeformationBehaviorofHigh-PurityTitaniumSingleCrystals:PartI.OrientationDe-pendenceofStress-StrainResponse.MetallurgicalandMaterialsTransa-CtionsA.1998:508510.[4].()[M].1972:161.[5].[M].,1982:81-82.[6]E.A..[M]..,1986:227230.[7].dc[J].,1999,21(4):181183.[8]MileliaPP,BonoraN.OntheDependenceoftheWeibullExponentonGeometryandLoadingConditionsandItsImplicationsontheFractureToughnessProbabilityCurveUsingaLocalApproachCriterion[J].InternationalJournalofFracture,2000,104(2):181208.[9]ChanKS,KimY-W.InfluenceofMicrostructureonCrack-TipMicromechanicsandFractureBehaviorsofaTwo-PhaseTiAlAlloy[J].MetalTransA,1992,23A:16631677.[10].[M].,2000:3843.TestandAnalysisofFractureToughnessofTi-Al-ZrTitaniumAlloyLIYuan-rui1HUANGRong1HUANGBen-duoQIUShao-yu2LIWei-jun21.CollegeofMaterialScienceandEngineeringinChongqingUniversityChongqing400030China2.NationalKeyLaboratoryofNuclearFuelandMaterialNuclearPowerInstituteofChinaChengdu610041ChinaAbstract:InordertomeasurethefracturetoughnessofTi-Al-Zralloyforgingoflow-strengthandhigh-toughness,thisreportfirstlytriestogetthevalueofKICbytestingthecompacttensilesampleaccordingtoGB4161-84StandardTestMethodforPlane-strainTractureToughnessofMetallicMaterials.Tthtestfoundthatthesampleisintheapparentsituationofplanestress.Afteranalyzingthereason,wetestthevalueofthecracktipopeningdisplace(COD)ofeverysampleusingmultiplesamplesaccordingtoGB/T2358-1994TestMethodforCrack-tipOpeningDisplacementMeasurementofMetallicMaterials.Aresis-tancecurves(Rcurves)andtheequationofthecurvesareobtainedbyprocessingthedataofsixeffectivesamples.Thencrack-tipopeningdisplacementofinitialcrackpoints(0=Δa)andfracturetoughnessKICofsuchtitaniumalloyarecalculated.AfterSEManalysisofcracksamples,variousfactorsinfluencingthefracturetoughnessofTi-Al-Zralloywasdiscussed,andanapproachtoimprovethefracturetoughnessofsuchtitaniumalloywaspresented.KeywordsSinglephaseTitaniumalloyForgingCrackopeningdesplacementFracturetoughnessVol.24.No.5.2003444(1946)1970(1973)2001(1974)1999()(420)PredictionModelforInitialPointofNetVaporGenerationforLow-FlowBoilingSUNQi1YANGRui-Chang2ZHAOHua11.Nationalkeylaboratoryofbubblephysics&naturalci