形变孪晶的消失与退火孪晶的形成机制

21220092JournalofIronandSteelResearchVol.21,No.2February2009:863(2002AA302501):(1963),,,;Email:[e-mail];:20080702杨钢1,孙利军2,张丽娜2,王立民1,王昌1(1.,100081;2.,113001):,,:;,,:;;:TG1422:A:10010963(2009)02003905AnnihilationofDeformationTwinsandFormationofAnnealingTwinsYANGGang1,SUNLijun2,ZHANGLina2,WANGLimin1,WANGChang1(1.InstituteforStructuralMaterials,ChinaIronandSteelResearchInstituteGroup,Beijing100081,China;2.FushunSpecialSteelCoLtd,Fushun113001,Liaoning,China)Abstract:TheinvestigationonECAPedausteniticstainlesssteelduringannealingshowsthatannihilationofstackingfaultsanddeformationtwinscouldoccurduringtherecoveryprocessduetobeingswallowedupgraduallybyadjacentsubgrainsandnewformedsubgrainswithintheareaofstackingfaultsintheformofbulgemechanism.Annihilationofdeformationtwinsincludedtwoaspectsofreason:deformationtwinswereswallowedupgraduallybyadjacentsubgrainsintheformofbulgemechanism;thenumberoflamellaedecreasedandthewidthoftwinlamellaeincreasedgraduallyintheformofconsolidationmechanism,eventuallytheinterfacesoftwinswithwidenedlamellaedisappearedduetothedislocationactivity.Theformationofannealingtwinswastheresultofmigrationofhighangleboundaryduringtherecovery.Keywords:ECAP;austeniticstainlesssteel;deformationtwin,,shockley,shockley,[1],,,{111},[2]Fe78%Ni[3],,,[4]CuFe50%Ni,,188,,,304L,,TEM1试验材料和方法,(500~90015h),TEM304L,25kg,(,%):C0004,Si030,Mn170,P00056,S0005,Cr1802,Ni12288mm45mm,(ECAP):=90!,=30!,MoS2102TEMH800(TEM),05mm,SiC40!m,3mm,MTP1,TEM:4%Cr2O3:,80~100mA(18~22V)2试验结果和分析211ECAP500TEM,500,,(a);(b)1ECAP500TEMFig1TEMmicrographsofonepassECAPedsamplesannealedat5001(a),TEM,(1)2,,,2,,1(b),12,,,;,,34,,,,52(a)ECAP600TEM,,(1)(23)2(b)2(a)(1),,∀40∀21(a)TEM;(b)1;(c)2;(d)32ECAP600TEMFig2TEMmicrographsofonepassECAPedsamplesannealedat600,,;,(1),,,2(c)2(a)2,,,2(d)2(a)3,,,,3(a)ECAP800TEM,,(2),(1),3(b),12,,,,,ECAP;:(1);(2),224ECAP6004(a),,4(b)∀41∀2:(a)TEM;(b)(a)3ECAP800TEMFig3TEMmicrographsanditsXRDpatternofonepassECAPedsamplesannealedat8004Fig4Micrographsofannealingtwins(),,,4(b),,,[3],(),,,,,,,()4(b),,,,,5(a)ECAP600,(),(),,145nm,,,,,,,,∀42∀21(a);(b)5Fig5Stackingfaultandtwinsformedduringannealing,,4(b),5(b)ECAP6006002(),21,,2,,,,3结论(1);:;,(2),:[1].[M].:,1999.[2],.[M].:,1985.[3]DashS,BrownN.AnInvestigationoftheOriginandGrowthofAnnealingTwins[J].ActaMetallurgica,1963,11(11):1067.[4]KopzkyCV,NovikovVY,FionovaLK.InvestigationofAnnealingTwinsinCCMetals[J].ActaMetallurgica,1985,33(5):873.∀43∀2: