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【英文标准名称】:StandardTestMethodforVerifyingtheAlignmentofX-RayDiffractionInstrumentationforResidualStressMeasurement
【原文标准名称】:残余应力测量用X射线衍射仪校准检定的标准试验方法
【标准号】:ASTME915-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:E28.13
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:alignment;residualstress;x-raydiffraction;Alignment;Instrumentalmeasurement--corrosion;Ironpowder;Metalsandmetallicmaterials;Misalignment;Precisioninstrumentation;Residualstress;Stress--metallicmaterials;Structuralmetals/alloys;V
【摘要】:ThistestmethodprovidesameansofverifyinginstrumentalignmentinordertoquantifyandminimizesystematicexperimentalerrorinX-raydiffractionresidualstressmeasurement.ThismethodissuitableforapplicationtoconventionaldiffractometersortoX-raydiffractioninstrumentationofeitherthedivergingorparallelbeamtypes.,Applicationofthistestmethodrequirestheuseofaflatspecimenofstress-freematerialthatproducesdiffractionintheangularregionofthediffractionpeaktobeusedforstressmeasurement.Thespecimenmustbesufficientlyfine-grainedandisotropicsothatlargenumbersofindividualcrystalscontributetothediffractionpeakproduced.Thecrystalsmustprovideintensediffractionatallanglesoftilt,x03C8;,whichwillbeemployed(seeNote1).Note18212;Completefreedomfrompreferredorientationinthestressfreespecimenis,however,notcriticalintheapplicationofthetechnique.1.1Thistestmethodcoversthepreparationanduseofaflatstress-freetestspecimenforthepurposeofcheckingthesystematicerrorcausedbyinstrumentmisalignmentorsamplepositioninginX-raydiffractionresidualstressmeasurement,orboth.1.2ThistestmethodisapplicabletoapparatusintendedforX-raydiffractionmacroscopicresidualstressmeasurementinpolycrystallinesamplesemployingmeasurementofadiffractionpeakpositioninthehigh-backreflectionregion,andinwhichthex03B8;,2x03B8;,andx03C8;rotationaxescanbemadetocoincide(seeFig.1).1.3Thistestmethoddescribestheuseofironpowderwhichhasbeeninvestigatedinround-robinstudiesforthepurposeofverifyingthealignmentofinstrumentationintendedforstressmeasurementinferriticormartensiticsteels.Toverifyinstrumentalignmentpriortostressmeasurementinothermetallicalloysandceramics,powderhavingthesameorlowerdiffractionangleasthematerialtobemeasuredshouldbepreparedinsimilarfashionandusedtocheckinstrumentalignment.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N78
【国际标准分类号】:19_100
【页数】:4P.;A4
【正文语种】:英语