ASTM C978-2004(2009) 用偏光显微镜和光学延迟补偿方法在透明玻璃基质中测定光弹性残余应力的标准试验方法

作者:标准资料网 时间:2024-05-15 19:13:16  浏览:9095   来源:标准资料网

【英文标准名称】:StandardTestMethodforPhotoelasticDeterminationofResidualStressinaTransparentGlassMatrixUsingaPolarizingMicroscopeandOpticalRetardationCompensationProcedures
【原文标准名称】:用偏光显微镜和光学延迟补偿方法在透明玻璃基质中测定光弹性残余应力的标准试验方法
【标准号】:ASTMC978-2004(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:C14.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Glassenamelapplications;Graduatedquartzwedgeopticalretardationprocedure;Ionexchangematerials/applications;Lightexposure;Retardation;Matrixdata/programs;Microscopicexamination;Opticalmaterials/properties/tests;Opticalretardation;Phot
【摘要】:Thequalityandperformanceofanarticleofglasswaremaybeaffectednotonlybythepresenceofresidualstressesduetoheattreatmentabovethestrainpointintheware,butalsobyadditionalresidualstressescausedbydifferencesinthermalexpansionbetweentheglasssubstrate,andeithercord,fired-onvitreousenamel,orACLdecoration.Theeffectsofthoseadditionalresidualcord,enamel,orACLstressesandtheresultingperformanceofsuchitemsmaybeevaluatedbyperformancetestprocedures.SuchevaluationsofenamelorACLstressesmayalsobeaccomplishedthroughthedeterminationofappropriatephysicalpropertiesofthedecorationandmatrixglass,orbyanalyticalmethods.Thistestmethodoffersadirectandconvenientmeansofdeterminingthemagnitudesandspatialdistributionsofresidualstresssystemsinglasssubstrates.Thetestmethodissimple,convenient,andquantitativelyaccurate.ThistestmethodisusefulinevaluatingthedegreeofcompatibilitybetweenthecoefficientofthermalexpansionofanenamelorACLappliedtoaglasssubstrate.1.1Thistestmethodcoversthedeterminationofresidualstressesinatransparentglassmatrixbymeansofapolarizingmicroscopeusingnullorretardationcompensationprocedures.1.2Suchresidualstressdeterminationsareofimportanceinevaluatingthenatureanddegreeofresidualstressespresentinglassmatrixesduetocord,orthedegreeoffit,orsuitabilityofaparticularcombinationofglassmatrixandenamel,orappliedcolorlabel(ACL).1.3TheretardationcompensationmethodofopticallydeterminingandevaluatingenamelorACLresidualstresssystemsoffersdistinctadvantagesovermethodsrequiringphysicalpropertymeasurementsorwareperformancetestsduetoitssimplicity,reproducibility,andprecision.1.4Limitations8212;Thistestmethodisbasedonthestress-opticalretardationcompensationprinciple,andisthereforeapplicableonlytotransparentglasssubstrates,andnottoopaqueglasssystems.1.5Duetothepossibilityofadditionalresidualstressesproducedbyionexchangebetweenglassesofdifferentcompositions,someuncertaintymaybeintroducedinthevalueofthestressopticalcoefficientinthepointofinterestduetoalackofaccurateknowledgeofchemicalcompositionintheareasofinterest.1.6Thistestmethodisquantitativelyapplicabletoandvalidonlyforthoseapplicationswheresuchsignificantionexchangeisnotafactor,andstressopticalcoefficientsareknownordeterminable.1.7Theextentoftheionexchangeprocess,andhencethemagnitudesoftheresidualstressesproducedduetoionexchangewilldependontheexchangeprocessparameters.Theresidualstressdeterminationsmadeonsystemsinwhichionexchangehasoccurredshouldbeinterpretedwiththosedependenciesinmind.1.8ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q30
【国际标准分类号】:81_040_10
【页数】:9P.;A4
【正文语种】:英语