Designation:A340−17StandardTerminologyofSymbolsandDefinitionsRelatingtoMagneticTesting1ThisstandardisissuedunderthefixeddesignationA340;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONInpreparingthisglossaryofterms,anattempthasbeenmadetoavoid,wherepossible,vectoranalysisanddifferentialequationssoastomakethedefinitionsmoreintelligibletotheaverageworkerinthefieldofmagnetictesting.Insomecases,rigoroustreatmenthasbeensacrificedtosecuresimplicity,butitisbelievedthatnoneofthedefinitionswillprovetobemisleading.ItistheintentofthisglossarytobeconsistentintheuseofsymbolsandunitswiththosefoundinANSI/IEEE260-1978andUSAStandardY10.5-1968.Part1—SymbolsUsedinMagneticTestingSymbolTermαcross-sectionalareaofBcoilAcross-sectionalareaofspecimenA'solidareaBHmagneticfluxdensitymagneticinduction∆BexcursionrangeofinductionBb·biasedinductionBdremanentinductionBdmremanenceBdHdenergyproduct(BdHd)mmaximumenergyproductB∆incrementalinductionBiintrinsicinductionBmmaximuminductioninahysteresisloopBmaxmaximuminductioninafluxcurrentloopBrresidualinductionBrsretentivityBssaturationinductioncfcrestfactorCMcyclicallymagnetizedconditiondlaminationthicknessDBdemagnetizingcoefficientdfdistortionfactorDmmagneticdissipationfactorEexcitingvoltageE1inducedprimaryvoltageE2inducedsecondaryvoltageEffluxvoltsfcyclicfrequencyinhertz^magnetomotiveforceffformfactorHmagneticfieldstrength∆HexcursionrangeofmagneticfieldstrengthHbbiasingmagneticfieldstrengthHcBcoercivefieldstrengthHcJintrinsiccoercivefieldstrengthHddemagnetizingfieldstrengthH∆incrementalmagneticfieldstrengthHgairgapmagneticfieldstrengthHLacmagneticfieldstrength(fromanassumedpeakvalueofmagnetizingcurrent)Hmmaximummagneticfieldstrengthinahyster-esisloopHmaxmaximummagneticfieldstrengthinaflux-currentloopHpacmagneticfieldstrength...
