Fe_32_Ni合金超细晶粒奥氏体的马氏体相变微观结构研究

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(11,341000;21,200240):Fe232%Ni,(TEM)Fe232%Ni,,,;,,,:;;;Fe232%Ni:TG11115:A:025426051(2010)0620001205MartensitemicrostructureofFe232%Nialloyultra2finegrainedausteniteHANBao2Jun1,XUZhou2(11SchoolofChemistryandLifeScience,GannanNormalUniversity,GanzhouJiangxi341000,China;21SchoolofMaterialsScienceandEngineering,ShanghaiJiaoTongUniversity,Shanghai200240,China)Abstract:Thesub2micrometerultra2finegrainedFe232%Nialloyaustenitewasfabricatedbymulti2axialforging,andthemartensitetransformationtakeplacebycryogenictreatment1Themartensitemicrostructureoftheultra2finegrainedFe232%Nialloywasobservedbytransmissionelectronmicroscopy(TEM)1Theresultsindicatethatthemartensiteflakesarenotintegrityanditsedgesarecrooked,especiallythemid2ridgesofsomemartensiteflakesarebroken1Theobservationofmartensitesubstructureindicatesthatsomesubstructureofmartensiteflakesarecoexistenceoftwinsandhighdensitydislocationsandsomemartensiteflakessubstructureareturnedtohighdensitydislocations1Theanalysisbelievesthattheformationreasonsofthespecialmartensitesub2microstructurearethattheaustenitegrainrefinementincreasingthestrengthofparentphaseincreasesthephasetransformationhindranceandthelargeamountofdislocationintroducedinthesevereplasticdeformedaustenitemaydamagetothespaceregulationsoftheparentphaselatticeatoms1Keywords:ultra2finegrains;martensitetransformation;microstructure;Fe232%Nialloy:2009211226:(50471017):(1980),,,,,,20:079728268052,E2mail:[e-mail],[126];Fe2NiCo(20200nm),,,,;Fe(N),[729],195K,100nm,[10212],,,,,1111Fe232%Ni,©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,%)Table1ChemicalcompositionoftheFe232%Nialloy(wt%)CSiMnPSNiAlNOFe010070101010401005010006321401022010007401020Bal.1,,20minFe232%Ni;45h1150,1h,950,Fe232%Ni120060min,,200m,Fe232%Ni1,16mm16mm16mm,1500(015Tm,TmFe232%Ni)10min,,0150,,500,10min,0150,,,,1Fig11Schematicdiagramofmulti2axialforgingprocess1015,,30tFe232%Ni015mm,,4%HClO4,,11230m,3mm,MTP21A-404%HClO4,75100V,Gatan691PIPS,:4,315keV,JEM22010H800,200kV2211Fe232%Ni210-2s-1500Fe232%Ni2Fe232%Ni10-2s-1500910(a)1015(b)TEMFig12TEMmicrographsofFe232%Nialloymulti2axiallyforgedat500andstrainrateof1022s21withcumulativestrainof(a)910and(b)1015©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:Fe232%Ni3910(2(a))1015(2(b))TEMFe232%Ni,1m,,700nm2(a),,,2(b),,2(b)A,2(b)B[13215],,,;,,,212Fe232%Ni3Fe232%NiTEM3(a),Fe232%Ni,,NiFe2Ni,;3(b)3Fe232%Ni(TEM)Fig13TEMmicrographsoftypicalmartensiteoftheFe232%Nialloy,Fe232%Ni,450010-2s-1Fe232%Ni910,,,;(4(a));4(b),,,4Fe232%Ni(910)TEMFig14TEMmicrographsoftheFe232%Nialloywithcumulativestrainof910afterquenching5Fe232%Ni1015,TEM,,(5(a)),(5(b));,(5(c)),(5(d))213,,,,,,©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1015)TEMFig15TEMmicrographsoftheFe232%Nialloywithcumulativestrainof1015afterquenching,,(3);Fe232%Ni,,,,,,,,,,,,[16]:,Fe232%Ni,,,,,,,,(4);,,,,,,,,,31),,50010-2s-1Fe232%Ni,1015,700nm2)Fe232%Ni,,,;,,,,©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:Fe232%Ni53),:[1],,,.[J].,2000,12(5):36239.[2],,,.[J].,2001,15(2):1712178.[3],,.Q235[J].,2001,37(6):5922600.[4],,.[J].,1983():24230.[5],,.[J].,1997,5(2):1242128.[6].[J].,1999,11(11):325.[7],,.[J].,1996,25(1):10212.[8],.Fe2Ni[J].,2002,26(12):125.[9],.[J].,1998,52(4):125.[10],,,.195K[C]133,2003:5982601.[11].[J].,1994,1(1):3213.[12]KapoorR,ChakravarttyJK.DeformationbehaviorofanultrafinegrainedAl2Mgalloyproducedbyequal2channelangularpressing[J].ActaMater,2007,55(16):540825418.[13]HanBaojun,XuZhou.GrainrefinementmechanismofFe2Nialloysduringmultiaxialforging[J].MaterSciTech,2006,22(11):135921363.[14]HanBaojun,XuZhou.MicrostructuralevolutionofFe232%Nialloyduringlargestrainmulti2axialforging[J].MaterSciEngA,2007,447(122):1192124.[15]HanBaojun,XuZhou.Grainrefinementundermulti2axialforginginFe232%Nialloy[J].JAlloyComp,2008,457(122):2792285.[16],,,.FeNiC[J].,2005,13(4):3902393.2006,2010,,,::::,:23:::,10,20,[e-mail],,(2010731,):2010831:918,91821:,1066(),260/():0512257262222,:13405128904:750/:160/,,,1000/10,()500/,1200/(),,::,:0516282025060,13952151550,E2mail:[e-mail];:,:13705280450,E2mail:[e-mail]