Designation:E1382−97(Reapproved2010)StandardTestMethodsforDeterminingAverageGrainSizeUsingSemiautomaticandAutomaticImageAnalysis1ThisstandardisissuedunderthefixeddesignationE1382;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThesetestmethodsmaybeusedtodeterminethemeangrainsize,orthedistributionofgraininterceptlengthsorareas,inmetallicandnonmetallicpolycrystallinematerials.Thetestmethodsmaybeappliedtospecimenswithequiaxedorelongatedgrainstructureswitheitheruniformorduplexgrainsizedistributions.Eithersemiautomaticorautomaticimageanalysisdevicesmaybeutilizedtoperformthemeasurements.1.Scope1.1Thesetestmethodsareusedtodeterminegrainsizefrommeasurementsofgraininterceptlengths,interceptcounts,intersectioncounts,grainboundarylength,andgrainareas.1.2Thesemeasurementsaremadewithasemiautomaticdigitizingtabletorbyautomaticimageanalysisusinganimageofthegrainstructureproducedbyamicroscope.1.3Thesetestmethodsareapplicabletoanytypeofgrainstructureorgrainsizedistributionaslongasthegrainboundariescanbeclearlydelineatedbyetchingandsubsequentimageprocessing,ifnecessary.1.4Thesetestmethodsareapplicabletomeasurementofothergrain-likemicrostructures,suchascellstructures.1.5Thisstandarddealsonlywiththerecommendedtestmethodsandnothinginitshouldbeconstruedasdefiningorestablishinglimitsofacceptabilityorfitnessforpurposeofthematerialstested.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.7Thesectionsappearinthefollowingorder:SectionSectionScope1ReferencedDocuments2Terminology3Definitions3.1DefinitionsofTermsSpecifictoThisStandard3.2Symbols3.3SummaryofTestMethod4SignificanceandUse...
