Title of article
Evaluationofductile–brittletransitiontemperaturebeforeandafterneutronirradiationforRPVsteelsusingsmallpunchtestsOriginalResearchArticle
Author/Authors
Min-ChulKim، نويسنده , , YongJunOh، نويسنده , , BongSangLee، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
7
From page
1799
To page
1805
Abstract
Smallpunch(SP)testswereperformedtoevaluatetheductile–brittletransitiontemperaturebeforeandafteraneutronirradiationofreactorpressurevessel(RPV)steelsproducedbydifferentmanufacturing(refining)processes.TheresultswerecomparedtothestandardtransitiontemperatureshiftsfromtheconventionalCharpytestsandtheMasterCurvefracturetoughnesstestsinaccordancewiththeAmericanSocietyforTestingandMaterials(ASTM)standardE1921.Smallpunchspecimensweretakenfroma1/4tlocationofthevesselthicknessandmachinedintoa10mm×10mm×0.5mmdimension.ThespecimenswereirradiatedintheresearchreactorsatKoreaAtomicEnergyResearchInstituteNuclearResearchInstituteintheCzechRepublicatthedifferentfluencelevelsofabout290°C.SmallpunchtestswereperformedinthetemperaturerangeofRTto−196°Cusinga2.4mmdiameterball.Forthematerialsbeforeandafterirradiation,thesmallpunchtransitiontemperatures(TSP),whicharedeterminedatthemiddleoftheuppersmallpunchenergies,showedalinearcorrelationwiththeCharpyindextemperature,T41J.TSPfromtheirradiatedsampleswasincreasedwiththefluencelevelsandwaswellwithinthedeviationrangeoftheunirradiateddata.However,thetransitiontemperatureshiftfromtheCharpytest(ΔT41J)showsabettercorrelationwiththetransitiontemperatureshift(ΔTSP(E))whenaspecificsmallpunchenergylevelratherthanthemiddleenergylevelofthesmallpunchcurveisusedtodeterminethetransitiontemperature.TSPalsohadacorrelationwiththereferencetemperature(T0)fromtheMasterCurvemethodusingapre-crackedCharpyV-notched(PCVN)specimen.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2005
Journal title
Nuclear Engineering and Design Eslah
Record number
894959
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