• Title of article

    CautionwhenapplyingeddycurrentinversiontostresscorrosioncrackingOriginalResearchArticle

  • Author/Authors

    NoritakaYusa، نويسنده , , LadislavJanousek، نويسنده , , MihaiRebican، نويسنده , , ZhenmaoChen، نويسنده , , KenzoMiya، نويسنده , , NobukiDohi، نويسنده , , NaokiChigusa، نويسنده , , YoshihiroMatsumoto، نويسنده ,

  • Issue Information
    روزنامه با شماره پیاپی سال 2006
  • Pages
    11
  • From page
    211
  • To page
    221
  • Abstract
    Thisstudyevaluatestheapplicabilityofcomputer-aidededdycurrentinversiontechniquestotheprofileevaluationofstresscorrosioncrackinginInconelwelds.Weldedplatespecimens,whichmodelheadpenetrationweldsofpressurizedwaterreactors,arefabricated;notchesandstresscorrosioncracksareartificiallyintroducedintotheweldmetalofthespecimens.Eddycurrentinspectionsareperformedusingauniformeddycurrentprobedrivenatfrequenciesof10and40kHz.Sinceweldnoiseisobserveduniformlyalongtheweldline,asimplesignalprocessingisappliedtoeliminateit.First,theartificialnotchesarereconstructedandgoodagreementsbetweenreconstructedandtrueprofilesareprovided,whichdemonstratesthatthecomputer-aidededdycurrentinversiontechniquecandealwithdefectsinwelds.Then,numericalsimulationsareperformedtoevaluatetheprofilesofthestresscorrosioncracks.Inthenumericalsimulations,thestresscorrosioncracksaremodeledasaconductiveregionwithafixedwidthof0.3mm.Thecross-sectionalprofilesofthecracksarereconstructedfrommeasurededdycurrentsignalsdirectlyaboveandalongacrack.Althougheddycurrentsignalscalculatedfromthereconstructedprofilesagreewellwithmeasuredones,thetrueprofilesrevealedbydestructivetestingarefoundtobeverydifferentfromthereconstructedones.Whereasthemostplausiblereasonforthedifferenceistheunexpectedlyvolumetricprofileofthestresscorrosioncracks,thisstudyhasrevealedthatcomputer-aidededdycurrentinversiontechniquesthathavebeenusedtoconsidercracksinthinstructureswouldnotatthispointbedirectlyapplicabletothoseinthickstructures.Itisalsoimportanttoknowinadvancethosecrackfeaturesthatcanadverselyimpactaccuratecracksizingincludingwhetheradetectedcrackisvolumetricornot,namelytherearemanyparallelcracksinaclusterornot.
  • Journal title
    Nuclear Engineering and Design Eslah
  • Serial Year
    2006
  • Journal title
    Nuclear Engineering and Design Eslah
  • Record number

    895985

    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=10&DC=895985