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1、MaterialsScienceandEngineeringA498(2008)289–295ContentslistsavailableatScienceDirectMaterialsScienceandEngineeringAjournalhomepage:www.elsevier.com/locate/mseaCharacterizationofthemechanicalpropertiesoflow-nickelausteniticstainlesssteelsM.Milititskya,∗,N.DeWispelaereb,R.Petrova,J.E.Ramosc
2、,A.Regulyc,H.HänninendaUniversityofGhent,DepartmentofMetallurgyandMaterialScience,Technologiepark903,B-9052Ghent,BelgiumbArcelor-MittalResearchInstituteGhent,OCAS,JohnKennedylaan3,B-9060Zelzate,BelgiumcUniversidadeFederaldoRioGrandedoSul,PPGEM,DepartmentofMetallurgy,OsvaldoAranha99,90035-
3、190PortoAlegre,BrazildHelsinkiUniversityofTechnology,LaboratoryofEngineeringMaterials,Puumiehenkuja3,FIN-02150Espoo,FinlandarticleinfoabstractArticlehistory:Thetensilepropertiesof6low-nickelausteniticstainlesssteelswereinvestigated.TheLudwigsonmodelReceived23February2008wasshowntobeadequa
4、teindescribingtheflowbehaviourofstable,lowstackingfaultenergyausteniticReceivedinrevisedform31July2008alloysintheentirestrainregimeofaconventionaltensiletest.NitrogenwasfoundtobethemosteffectiveAccepted4August2008elementinincreasingthelatticefrictionstress0,whileCwasthemosteffectivealloyi
5、ngelementinincreasingtheefficiencyofgrainboundarystrengthening(ky).ThecombinedeffectofN+CresultedinKeywords:high-sustainedworkhardeningratesandadelayintheonsetofdynamicsoftening.TheadditionofCuandAusteniticstainlesssteelNi,twoelementswhichareknowntoincreasethestackingfaultenergyhadtheoppos
6、iteeffect.HighworkMechanicalpropertieshardeningrateswereaccompaniedbyastrongrotatedbrass{110}111texturedevelopment.WhileNickel-free-martensitewasshowntonucleateinside-martensiteclusters,nucleationdirectlyfromcouldnotNitrogenbeexcluded.Thedevelopmentof-martensiteresultedinastrongin
7、creaseintheworkhardeningrateGrainboundarystrengtheninginuniaxialtension.©2008ElsevierB.V.Allrightsreserved.1.Introductionfccaustenitephase[3].Interstitialelements(N,CandB)increasethestrengthofausteniticstainlesssteelsmoresignificantlythanNiisthealloyingelementtraditi
