材料织构与晶界特征分布及其性能增强

:10071385(2002)03000106(,110034):,Cu,,LY12,,,,GBCD,:;;;:TG113111:A060,,,80,Watanabe[1],(GrainBoundaryCharacterDistrbution,GBCD),,SEMEB2SP,GBCDODF,Bunge[2]1982(MODF),g,,GBCD[3]GBCD,GBCD,GB2CD,,,:20020526:(98G54011);(01102004):(1963),,,(Brandon,=1);,,(38.2111,=7),,,1,GBCD,;,,,ONOG,fcc,1.1,(1a),{110}112(B){112}111(C){123}634(S),{110}001(Goss)20029193JournalofShenyangInstituteofAeronauticalEngineeringSep.2002Vol.19No.3©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,(35m),(70%),(1c),(92%),,(),,,(83%)(18m,15m,12m),(2),135m,70%ODF(=10)(a)t=0ms;(b)t=13.2ms;(c)t=15.0ms;(d)t=45msTEM,15m88%,,[001]PPND(3a)[001]PPND[110]PPND[112]PPND[123]PPND,[001]PPND,1501,[001]PPND;,,[100]PPNDEBSP,,2(t=15.0ms)ODF(a)18m,88%;(b)15m,86%;(c)15m,88%;(d)12m,88%315m,88%(a)substructures;(b)Adiffractionpattern;(c)Bdiffractionpattern;(d)Cdiffractionpattern;(e)Ddiffractionpattern,CB,,,X-TEMSEM-EBSP,--219©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,112LY12,,,(4(a));,,(f(g)max=4;+(f(g)max=513),(SCB),3(4(d)),LY12,+SCB,,4LY12ODFÊ2(Ê2=5)(a);(b);(c);(d)+,,(),,,,,+,,,()Gibbs-ThomsonRc=2Ppd[4],pd,,Rc9a,,S40111(7),,,2,,,,Gibbs-TohmsonS(=30;=32;Ê=25)[5],S40111,S,,,,,,2:3©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.[6][7][8],:fRr(g)=fR(g)+[1-fR(g)dg]fD(g)(1)(fR(g)ODF,fD(g)ODF,,;,,,CBS,;,,,,GibbsThomson,3GBCD,LYl2EBSPEBSP,(5),+7,CSL(a)(b)5LY12CSL(a)500P10min+380P6hannealed(b)180P2hrecovered+320P1h+380P5hannealed,+(70m)(150m);+,(6)(a)(b)+6LY12(a)+(b),++7,SCSL,()419©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.4GBCD30mm6mm0.8mm,9.8N,350,[9],,[10],(GBCD),LY12350,120min,90%500P10min+380P6h(A1)380/6h(A2)180/2h+320/1h+380/5h(A3)A3A17,CSL,7,,7LY12A2-380P6hA3-180P2hrecovered+320P1h+380P5h8LY12(a)A3-180/2hrecovered+320/1h+380/5h(b)A1-500/10min+380/6h(c)A2-380/6hLY12,,;,;(7)85,,,,,GBCD,2:5©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,LY12:[1]T.Watanabe,Res.Mechanica11984,11147[2]H.J.Bunge,TextureAnalysisinMaterialsScience,Butterworth,Lon2don,1982[3]L.Zuo,T.Watanabe,C.Esling,Z.Metallkde,1994,851554[4]VatneHE,Daaland1O,NesE.MaterialsScienceForum11994,5716211087[5]I.Samajdar,R.D.Dorherty,ScriptaMetall.,1995,32,845[6]D.J.Jensen,ActaMetall.Mater.,1995,4314117[7]F.J.Hamphrey,M.Hatherly,RecrystallizationandRelatedPhenomi2na,PergomonPress,1995,18[8]U.KÊhler,E.Dahlem-Klein,H.Klein,H.J.Bunge,TexturesandMicrostructures11992,191125[9]KimBN,HiragaK.ContributionofGrainBoundarySlidinginDiffu2sionalCreep.ScritaMaterialia[J],2000,42(5):451-456[10]ZhouZhiqiang,WuBaolinandChenChangqi.ExperimentResearchofGrainBoundarySlidinginOrientedAluminumBicrystals[A].Ed2itedbyChenChangqi.Proc.of2thInternationalConfereenceonAlu2minumAlloys[C].BeijingChina:InternationalAcademicPublishers,1990.571-574TexturesandgrainboundarydistributionfunctionsofthematerialsandtheirperformanceenhancementWUBaolin(DepartmentofMaterialsScienceandEngineeringofShenyangInstituteofAeronouticalEngineering,LiaoningShen2yang110034)Abstract:Inoderforstudyingregularityandmechanismoftextureformation,thecoppersheetswererecrystallizedbylaserbeamultrarapidlyheating.Thetexturecharacteristicsanditsvariationundertheconditionoflaserheatingwerestudied.Therecrystallizationtexturemechanismwassuggestedbasedonanalysisandcomputersimulation.Thepointofviewisthatcubeformationisduetothecubecrystallitesretainedindeformedmatrixaftercold-rollingandad2vantageofcubenucleationanditshighgrowthratecausedbysizeeffectivenessasaresultofmicro-growthselec2tion.TheevolutionofrecrystallizationtexturesofLY12aluminumalloysamplesannealedatdifferenttemperaturesanddifferenttimewasinvestagatedandtheCSLgrainboundarycharacterdistributionaswellascorrosionandcreepresistingpropertieswerestudiedbymeansofEBSP(electronbackscatteringpattern)analysistechnique.Theexperi2mentresultsarecomprehensivlyreportedinthispaper.Keywords:texture;grainboundarycharacterddistribution;intergranularcorrosion;creep619©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.