誗MaterialProperties誗[1],、、。,,[2]。,,。,[3],。、,,,。6061,(MSFE),(MSPF),。1。,[4],:f0d=A+A12ρ(r,t)-ρ0ρρ2+A24ρ(r,t)-ρ0ρρ4-B12ρ(r,t)-ρ0ρρ2qj=1Ση2j+B24qj=1Ση4j+K12+qj觶=1Σqi≠jΣη2iη4j(1):ηiηj;A、A1、A2、B1B2;ρ0;ρ(r,t),Cahn-Hilliard,(2)。鄣ρ(r,t)鄣t=M2δFδρ(r,t)(2):M。,。6061,w(%):0.6Si、0.7Fe、0.25Cu、0.15Mn、0.95Mg、0.18Cr、0.25Zn、0.15Ti,Al。,,。,150μm×150μm,512×512,6061(255000):,,6061,。,,。,。:;;:TG156;TG113:A:1000-8365(2014)06-1196-03StudyonGrainDistributionofWrought6061AluminumAlloyDuringAnnealingLINDongmei(ZiboVocationalInstitute,Zibo750000,China)Abstract:Thegraingrowthandgraindistributionofwrougnt6061aluminumalloyduringannealingwerestudiedbythephase-fieldfunctionmodelandthemeshdistortionmodel.Theresultsshowthattherecrystallizationnucleationformatgrainboundaries,andthenextendtothegrainsbymergingandswallowingthesurroundinggrains.Thegrainsarecoarseningduetoincreasingoftheannealingtemperature.Keywords:aluminumalloy;phase-fieldmodel;graindistribution:2013-11-15:(XYSK09YB006):(1967-),,,.:.:13011626361,E-mail:liantiechang@126.comFOUNDRYTECHNOLOGYVol.35No.6Jun.20141196··:6061Δx=0.293μm;Δt=0.2s;0.029,M=3.87×10-20m2·mol/(s·J)。(1)1。,,ε=0.25,,。6061。22.1[5],,。MSPF6061ε=0.25,,,,。。1473KT/KA/kJ·mol-1A1/kJ·mol-1A2/kJ·mol-1B1/kJ·mol-1B2/kJ·mol-1ρ0473-17.523.23.42.6651.30.18523-19.822.15.32.6651.30.18573-22.321.213.11.9851.30.21623-25.320.518.41.9851.30.211Tab.1Numericalparametersinfreeenergyfunctionforsimulationatdifferenttemperature(a)(b)(c)(d)1473KFig.1Recrystallizationatannealingtemperatureof473K。,,,。2.2,,,。473K,,,、,,,。523K,,。6061,473K,。,。,,Pw,:Pw=Ni·Si/(∑Ni·Si)(3):Si;Ni。2。,473K1000s,,4μm8μm,。,。,,。2.336061。,,,。,,,。3MSFE,6061《》06/20141197··3473K1000s(ε=0.25)Fig.3Materialmicrostructuremorphologyofrecrystallizationprocessat473Kfor1000s(a)(b)15μm2Fig.2Theprobabilitydistributionofgrainsizeatdifferentannealingtemperatures(a)473K(b)523K(c)573K(d)623KPw(%)D/μmD/μmD/μmabcd129630129630129630129630481216481216481216481216D/μmPw(%)Pw(%)Pw(%),、、。,,,。,,。,,,,6061,,。:[1],,.[J].,2009,30(1):120-124.[2],.[J].,2009(10):7094-7100.[3],.[J].,2010(S1):223-226.[4],,.[J].,2011,32(3):318-320.[5],,,.[J].,2012(10):1215-1222.FOUNDRYTECHNOLOGYVol.35No.6Jun.2014《》201420145192,,《》2014()。,,,,(),,、,、,、,《》。,《》。,《》,。()!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1198··