ASTM B594-2009 航空设备用铝合金锻制品的超声波检验的标准实施规程

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【英文标准名称】:StandardPracticeforUltrasonicInspectionofAluminum-AlloyWroughtProductsforAerospaceApplications
【原文标准名称】:航空设备用铝合金锻制品的超声波检验的标准实施规程
【标准号】:ASTMB594-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:B07.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:航空航天
【英文主题词】:aerospace;aluminum-alloywroughtproducts;ultrasonicinspection;Aerospaceapplications;Aluminumalloys--ultrasonicinspection;Ultrasonictesting--metals/alloys
【摘要】:Anumberoffactorssuchastheconditionoftheentryandbacksurfacesoftheinspectedpart,theinclinationoftheultrasonicbeamwithrespecttotheentrysurface,andvariationsintheperformancecharacteristicsofthetestsystemmaycausesignificantdifferencesinamplitudesofdiscontinuityindicationsandbackreflections.Thesefactorscanseriouslyimpairthereliabilityandthequantitativevalueoftheultrasonictestoutlinedinthispractice.Accurateevaluationsofdiscontinuitysizearealsosignificantlyaffectedbyvariationsinsearchunitcharacteristicsandbyirregularitiesindiscontinuitysurfaceswhichcaninfluencereflectivity.Forthesereasons,thediscontinuitysizesthatmaybeimpliedbytheultrasoniccomparisonsoutlinedinthispracticemustberegardedasx201C;apparentx201D;orx201C;estimatedx201D;inrecognitionofthelimitedquantitativevalueofthemeasurement.Becausenumerousinteractingvariablesinatestsystemcanadverselyinfluencetheresultsofanultrasonicinspection,theactualquantitativeeffectsofdetecteddiscontinuitiesuponthemechanicalpropertiesoftheinspectedproductaredifficulttoestablish.Althoughthispracticeprovidesareliablecontrolofproductqualityduringmanufacture,itisnotapplicableasanexclusiveindicatoroftheultimatequalityandperformanceofcomponentsfabricatedfromtheinspectedproductscoveredbythispractice.1.1Thispracticecoverstherequirementsforpulse-echoultrasonicinspectionandincludescriteriausedtodefineapplicablequalitylevelsofaluminum-alloywroughtproductsforaerospaceapplicationswhenperformanceoftheultrasonictestbytheproducerisspecified,orwhenultrasonicinspectionisperformedbythepurchaseruponreceipt.1.2Thispracticeisnotapplicableifplasticdeformationisintroducedintothematerialafterdelivery.1.3Theultrasonictestdescribedinthispracticeisemployedtodetectinternaldiscontinuitiesorientedinadirectionparallelto,ornearlyparallelto,thesurfaceoftheproduct.Thetestisperformedeitherbytheimmersionmethodorthecontactmethodusingpulsedlongitudinalwaveswhicharetransmittedandreceivedbyasearchunitcontainingeitherasinglecrystaloracombinationofelectricallyinterconnectedmultiplecrystals.Ultrasonictestsemployingeitherthethrough-transmissionortheangle-beamtechniquesarenotincluded.Note18212;Ultrasonictestsemployingangle-beamtechniquesrequirespecialreferenceblocks,searchunits,andscanningproceduresandaresubjecttonegotiationbetweenthepurchaserandthesellerwhensuchtestsarerequiredbythecontractorpurchaseorder.1.4Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitswhichareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:49_025_20
【页数】:10P.;A4
【正文语种】:英语