Designation:B886−12StandardTestMethodforDeterminationofMagneticSaturation(Ms)ofCementedCarbides1ThisstandardisissuedunderthefixeddesignationB886;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofmagneticsaturation(Ms)ofcementedcarbidepowdermaterialsandsinteredproductsusingmagneticsaturationinductiontestinstrumentation.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A340TerminologyofSymbolsandDefinitionsRelatingtoMagneticTestingB243TerminologyofPowderMetallurgyE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodE1316TerminologyforNondestructiveExaminations3.Terminology3.1Definitions:3.1.1FordefinitionoftermsusedinthisprocedurerefertoTerminologyA340,TerminologyB243,andTerminologyE1316.3.1.2dc—directcurrent.4.SummaryofTestMethod4.1Atestspecimenisstaticallypositionedinthemagneticfieldgeneratedbydccoilsorapermanentmagnetandsensingcoilsofthetestapparatus.Thespecimenismagnetizedtoinductionsaturationbythefieldandtranslatedlinearlythattheintrinsicmagneticmomentofthespecimen’sbinderphaseinducesadccurrenttoflowinthesensingcoilsofthetestapparatus.Theinducedcurrentisproportionaltotheamountofmagneticbinderphasepresentinthetestspecimen.Measure-mentoftheinducedcurrentpermitscalculationoftheintrinsicmagneticsaturationofthetestsample.5.SignificanceandUse5.1Thistestmethodallowsthenondestructivemeasure-mentof...
