Designation:E2627−13StandardPracticeforDeterminingAverageGrainSizeUsingElectronBackscatterDiffraction(EBSD)inFullyRecrystallizedPolycrystallineMaterials1ThisstandardisissuedunderthefixeddesignationE2627;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeisusedtodeterminegrainsizefrommeasurementsofgrainareasfromautomatedelectronback-scatterdiffraction(EBSD)scansofpolycrystallinematerials.1.2TheintentofthispracticeistostandardizeoperationofanautomatedEBSDinstrumenttomeasureASTMGdirectlyfromcrystalorientation.TheguidelinesandcaveatsofE112applyhere,butthefocusofthisstandardisonEBSDpractice.1.3Thispracticeisonlyapplicabletofullyrecrystallizedmaterials.1.4ThispracticeisapplicabletoanycrystallinematerialwhichproducesEBSDpatternsofsufficientqualitythatahighpercentageofthepatternscanbereliablyindexedusingautomatedindexingsoftware.1.5Thepracticeisapplicabletoanytypeofgrainstructureorgrainsizedistribution.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E7TerminologyRelatingtoMetallographyE112TestMethodsforDeterminingAverageGrainSizeE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodE766PracticeforCalibratingtheMagnificationofaScan-ningElectronMicroscopeE1181TestMethodsforCharacterizingDuplexGrainSizesE1382TestMethodsforDeterminingAverageGrainSizeUsingSemiautomaticandAutomaticImageAnalysis3.Terminology3.1Definitions:3.1.1cleanup...
