17CrNiMo6钢中板条马氏体的形态与晶体学分析

28220074TRANSACTIONSOFMATERIALSANDHEATTREATMENTVol.28No.2April200717CrNiMo6王春芳1,2,王毛球1,2,时捷1,2,惠卫军1,2,董瀚1,2(1.,100081;2.,100081):(EBSD)TEM17CrNiMo6packetKS:KS,packet6KS,6KS:(EBSD);;;::A:10096264(2007)02006405Themorphologyandcrystallographicanalysisoflathmartensitein17CrNiMo6steelWANGChunfang1,2,WANGMaoqiu1,2,SHIJie1,2,HUIWeijun1,2,DONGHan1,2(1.NationalEngineeringResearchCenterofAdvancedSteelTechnology,Beijing100081,China;2.InstituteforStructuralMaterials,CentralIronandSteelResearchInstitute,Beijing100081,China)Abstract:Themorphologyandcrystallographyanalysisoflathmartensitewithinapacketin17CrNiMo6steelwasstudiedbyelectronbackscatteringdiffraction(EBSD)withfieldemissiongun.TheproceduresofthecrystallographicanalysisofthemartensitephasewiththeKurdjumovSachs(KS)orientationrelationshipwasexplained.Theresultsindicatethat,althoughtheobservedorientationofthemartensitecrystalsisscatteredaroundtheidealvariantKSorientation,themartensiteinthissteelmaintainstheKSorientationrelationship.Specificcombinationsoftwoofthesixvariantsarediscovered.Keywords:EBSD;lathmartensite;crystallography;orientation:20060420;:20060621:(MKPT200407ZD);(863)(2006AA03Z526):(1977!),,,,1,:13581808343,Email:[e-mail],,(packet),packet(block),block(lath)[1]packetblock[2,3],TEM,,,(01m05∀)!!!SEM(ElectronBackscatterDiffraction,EBSD),[1,48]Morito[1]EBSD,(00026~038%C)packetblock,blockKS(subblock),subblock10∀Kitahara[5]NishiyamaWassermann(NW),FESEMEBSDFe285%NWKitahara[8]EBSD,02wt%CKS,packet,packetEBSD,,EBSD17CrNiMo61实验材料和方法17CrNiMo6,(,%):C017,Si021,Mn055,P0011,S0002,Cr180,Ni158,Mo025,Cu016,8mm#8mm#15mm,1473K30min(),573K2%,,-30∃,8%,75~100V5mm#5mm,EBSDEBSD,,2%:70ml+12ml+10ml+8ml,30V,243KOLYMPUSGX51,HITACHIH800EBSDJEOL6500FSEMEDAXTSLPEGASUS1200EBSDEDSSEM30kV,100nA2晶体学分析方法,KS,(Nishiyama)GT(GreningerTroiano)[1,8]018%C0006%Si002%Mn020%C019%Si035%MnKS17CrNiMo6,17CrNiMo6KS()(!%)KS:(111)(011)!%[101][111]!%,KS()24124KS(V1-V24)V1KS[1][5,8]:M=TA(1)T,MA,,1V1:[111][101][011]!%[111]!%,:-0.7070.4080.5770.000-0.8160.5770.7070.4080.577&-0.5770.8160.000-0.577-0.4080.7070.5770.4020.707T1=M1A-1(2),KS24124KSTable1The24variantsfortheKSorientationrelationshipVariantPlaneparallel()(!%)Directionparallel()(!%)RotationaxisbetweenV1andothervariantsAngle(∀)V1[101][111]--V2[101][111][0577-05770577]6000V3(111)(011)[011][111][0000-0707-0707]6000V4[011][111][000007070707]1053V5[110][111][000007070707]6000V6[101][111][0000-0707-0707]4947V7[101][111][-0577-05770577]4947V8[101][111][0577-05770577]1053V9(111)(011)[110][111][-018607660614]5051V10[110][111][-0490-04620738]5051V11[011][111][0354-0932-0065]1488V12[011][111][0356-07130603]5721V13[011][111][093303540065]1488V14[011][111][-07390463-0490]5051V15(111)(011)[101][111][-0246-0628-0738]5721V16[101][111][065906590363]2061V17[110][111][-06590363-0659]5173V18[110][111][-0302-0626-0719]4711V19[110][111][-06140186-0767]5051V20[110][111][-0357-0603-0714]5721V21(111)(011)[011][111][09550000-0296]2061V22[011][111][-07190302-0626]4711V23[101][111][-0738-02460628]5721V24[101][111][091204100000]2106652:17CrNiMo6T1-T24,24(M1-M24)1(001)[100]24[8],11{001}(001)[100]24KS()Fig1{001}polefigureshowingtheorientationsofthe24martensitevariantstransformedfromasinglecrystalaustenitewitha(001)[100]orientationthatmaintaintheKSorientationrelationship(thenumbersindicatethemartensitevariants)24(R)M2=RM1(3),R[5]KSV113实验结果与讨论312(a)17CrNiMo6,,(block),blockpacket2(b)17CrNiMo6,,323,:packet,block217CrNiMo6(a);(b)Fig2Opticalmicrograph(a)andTEMimage(b)oflathmartensitein17CrNiMo6steel3Fig3Schematicillustrationofthelathmartensitestructure(lath),blockpacket{111}block{111},6628packetpacket{111}block,1,packet,(packetblock)417CrNiMo6packet(a)IPF(b)Fig4(a)Opticalmicrographofapacketin17CrNiMo6steeland(b)inversepolefigurecolormap4(a)17CrNiMo6packet,4(b)FESEMEBSDIPF(inversepolefigurecolormap),2m4(b),packet,1packetblock10∀,15∀17CrNiMo658m,5(a)4,02m515∀()5(b){001},5(a)(5(b)),5(a)(5(b)),5(a),NWFe285%Ni[5]KS02%C[8]124(5(b))6(V1~V6)66KS,17CrNiMo6KS5(a)17CrNiMo6IPF;(b)IPF{001}()Fig5(a)Inversepolefigurecolormapofthelathmartensitestructurein17CrNiMo6steel;(b){001}polefigureshowingorientationsofthelathmartensitecorrespondingtotheIPFmap(Symbolsandnumbersin(a)and(b)indicatethevariantnumber)17CrNiMo6packet6:V1V4,V2V5,V3V6,5(a)672:17CrNiMo6,4结论1)17CrNiMo6packet,block,lath;2)packet6KS,KS;3)17CrNiMo6packet6:V1((111)[101](011)[111])V4((111)[011](011)[111]),V2((111)[101](011)[111])V5((111)[110](011)[111]),V3((111)[011](011)[111])V6((111)[101](011)[111]);[1]MoritoS,TanakaH,KonishiR,etal.ThemorphologyandcrystallographyoflathmartensiteinFeCalloys[J].ActaMaterialia,2003,51(6):1789-1799.[2]InoueT,MatsudaS,OkamuraY,etal.Thefractureofalowcarbontemperedmartensite[J].TransactionsofJIM,1970,11:36-43.[3]SwarrTE,KraussG.TheeffectofstructureonthedeformationofasquenchedandtemperedmartensiteinanFe02pctalloy[J].MetallurgicalTransactionsA,1976,7(1):41-48.[4]GourguesAF,FlowerHM,LindleyTC.Electronbackscatteringdiffractionstudyofacicularferrite,bainite,andmartensitesteelmicrostructures[J].MaterialsScienceandTechno