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【英文标准名称】:StandardGuideforPlanarFlawHeightSizingbyUltrasonics
【原文标准名称】:用超声波法测定平面裂纹高度尺寸的标准指南
【标准号】:ASTME2192-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E07.06
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:evaluation;examination;flaw-heightsizing;flawsizing;nondestructivetesting;ultrasonic;Evaluationdevices/systems;Nondestructiveevaluation(NDE);Planarflaw-heightsizing;Timeofflight(TOF)sizingtechnique;Ultrasonicdiffraction;Ultra
【摘要】:Thepracticesreferencedinthisdocumentareapplicabletomeasuringtheheightofplanarflawsopentothesurfacethatoriginateonthefar-surfaceornear-surfaceofthecomponent.Thesepracticesareapplicabletothrough-wallsizingofmechanicalorthermalfatigueflaws,stresscorrosionflaws,oranyothersurface-connectedplanarflaws.Thetechniquesoutlineddescribeprovenultrasonicflawsizingpracticesandtheirassociatedlimitations,usingrefractedlongitudinalwaveandshearwavetechniquesasappliedtoferriticorausteniticcomponents.Othermaterialsmaybeexaminedusingthisguidewithappropriatestandardizationreferenceblocks.Thepracticesdescribedareapplicabletobothmanualandautomatedexaminations.ThetechniquesrecommendedinthisstandardguideuseTimeofFlight(TOF)orDeltaTimeofFlight(x0394;TOF)methodstoaccuratelymeasuretheflawsize.Thisguidedoesnotincludetheuseofsignalamplitudemethodstodetermineflawsize.Generally,withthesesizingmethodsthevolumeofmaterial(orcomponentthickness)tobesizedisdividedintothirds;theinner1/3,themiddle1/3andtheouter1/3.Usingthefar-surfaceCreepingWaveMethodtheusercanqualitativelysegregatetheflawintotheapproximate1/3zone.Thesizingmethodsareusedin1/3zonestoquantitativelysizethecrack,thatis,Tip-diffractionfortheinner1/3,Bi-Modalmethodforthemiddle1/3,andtheFocusedLongitudinalWaveorFocusedShearWaveMethodsfortheouter1/3.These1/3zonesaregenerallyapplicabletomostsizingapplications,however,thevarioussizingmethodshaveapplicationsoutsidethese1/3zonesprovidedaproperreferenceblockandtechniqueisdemonstrated.1.1Thisguideprovidestutorialinformationandadescriptionoftheprinciplesandultrasonicexaminationtechniquesformeasuringtheheightofplanarflawswhichareopentothesurface.Thepracticesandtechnologydescribedinthisstandardguideareintendedasareferencetobeusedwhenselectingaspecificultrasonicflawsizingtechniqueaswellasestablishingameansforinstrumentstandardization.1.2Thisstandardguidedoesnotprovideorsuggestaccuracyortolerancesofthetechniquesdescribed.Parameterssuchassearchunits,examinationsurfaceconditions,materialcomposition,etc.canallhaveabearingontheaccuracyofresults.Itisrecommendedthatusersassessaccuracyandtolerancesapplicableforeachapplication.1.3Thisdocumentdoesnotpurporttoprovideinstructiontomeasureflawlength.1.4Thisstandardguidedoesnotprovide,suggest,orspecifyacceptancestandards.Afterflaw-sizingevaluationhasbeenmade,theresultsshouldbeappliedtoanappropriatecodeorstandardthatspecifiesacceptancecriteria.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatoryrequirementspriortouse.
【中国标准分类号】:A42
【国际标准分类号】:19_100
【页数】:22P.;A4
【正文语种】:英语