ASTM F319-1991a(2003) 航空航天用透明加热元件中裂纹的偏振光检测标准实施规范

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【英文标准名称】:StandardPracticeforPolarizedLightDetectionofFlawsinAerospaceTransparencyHeatingElements
【原文标准名称】:航空航天用透明加热元件中裂纹的偏振光检测标准实施规范
【标准号】:ASTMF319-1991a(2003)
【标准状态】:现行
【国别】:
【发布日期】:1991
【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】:F07.08
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:加热元件;试验;航天技术;航空运输;透明度;检测;光;裂纹;材料;工艺;航空航天运输
【英文主题词】:coatings;conductivecoatings;heatingelements;polarizedlight;polarizedlightinspection
【摘要】:Thispracticeisusefulasascreeningbasisforacceptanceorrejectionoftransparenciesduringmanufacturingsothatunitswithidentifiableflawswillnotbecarriedtofinalinspectionforrejectionatthattime.Thispracticemayalsobeemployedasago-nogotechniqueforacceptanceorrejectionofthefinishedproduct.Thispracticeissimple,inexpensive,andeffective.Flawsidentifiedbythispractice,aswithotheropticalmethods,arelimitedtothosewhichproducetemperaturegradientswhenelectricallypowered.Anyothertypeofflaw,suchasminorscratchesparalleltothedirectionofelectricalflow,arenotdetectable.Ifanothermethod(equallysuitableforflawdetection)isdesignatedforfinalopticalinspectionofthelaminatedpartunderpower,thepolarizedlightpracticewillnotberequiredforthefinalinspection.1.1Thispracticecoversastandardprocedurefordetectingflawsintheconductivecoating(heaterelement)bytheobservationofpolarizedlightpatterns.1.2Thispracticeappliestocoatingsonsurfacesofmonolithictransparenciesaswellastocoatingsimbeddedinlaminatedstructures.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ForspecificprecautionarystatementsseeSection6.
【中国标准分类号】:V04
【国际标准分类号】:49_060(AEROSPACEELECTRICEQUIPMENTANDSYSTEMS)
【页数】:3P.;A4
【正文语种】: