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《Effect of Cu addition on microstructure and mechanical properties of 15%Cr super martensitic stainless steel》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、MaterialsandDesign41(2012)16–22ContentslistsavailableatSciVerseScienceDirectMaterialsandDesignjournalhomepage:www.elsevier.com/locate/matdesShortCommunicationEffectofCuadditiononmicrostructureandmechanicalpropertiesof15%Crsupermartensiticstainlessste
2、elaaaba,?DongYe,JunLi,WenJiang,JieSu,KunyuZhaoaFacultyofMaterialsScienceandEngineering,KunmingUniversityofScienceandTechnology,Kunming650093,ChinabInstituteforStructuralMaterials,CentralIron&SteelResearchInstitute,Beijing100081,Chinaarticleinfoabstra
3、ctArticlehistory:TheeffectofaddingdifferentcontentofCu(0wt.%,1.5wt.%and3wt.%)tothe15%CrsupermartensiticReceived30November2011stainlesssteel(SMSS)wasinvestigatedusingopticalmicroscope,scanningelectronmicroscope(SEM),Accepted18April2012transmissionelec
4、tronmicroscope(TEM)andX-raydiffraction(XRD).ItsconsequenceonmechanicalAvailableonline27April2012propertieswasexaminedtoclarifytheroleofCuinthetestedsteels.Theexperimentalresultsindicatethatthemicrostructuresofthreetestedsteelsaretemperedmartensite,re
5、tainedausteniteandreversedaustenite;twokindsofaustenitesaredispersedlydistributedamongmartensitematrix.CucansoluteinmatrixunderquenchingconditionandcanprecipitateasCu-richnanometerphase(e-Cu)duringtemper-ing.Cuishelpfulforthegrainre?nementandtopromot
6、etheformationofreversedausteniteduringtem-pering.Themaximumvolumefractionofausteniteis55.9%inthesteelwith3wt.%Cu,whichisresponsiblefortheimprovementofductility.Theresultsofthemechanicalpropertiestestsrevealthatthemechanicalpropertiesaresigni?cantlyin
7、?uencedbythevolumefractionofaustenite.Cucancausesolidsolutionstrengthening,precipitationstrengtheningandgrainre?nementstrengtheninginSMSS.Cualloyedsupermartensiticstainlesssteelexhibitsgreatlyimprovedmechanicalproperties.ó2012ElsevierLtd.Allrightsres
8、erved.1.IntroductionMeanwhileitsprecipitatedphaseisinnanometersize,whichmightberesponsiblefortheincreaseofthestrengthandplasticityAttheendofthe1950s,theconceptofsupermartensiticstain-[8–11].Inaddition,Cucanalsoimprovethepropertiesofcorrosionlesssteel
