Designation:E1681−03(Reapproved2013)StandardTestMethodforDeterminingThresholdStressIntensityFactorforEnvironment-AssistedCrackingofMetallicMaterials1ThisstandardisissuedunderthefixeddesignationE1681;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheenvironment-assistedcrackingthresholdstressintensityfactorparameters,KIEACandKEAC,formetallicmaterialsfromconstant-forcetestingoffatigueprecrackedbeamorcompactfracturespecimensandfromconstant-displacementtestingoffatigueprecrackedbolt-loadcompactfracturespecimens.1.2Thistestmethodisapplicabletoenvironment-assistedcrackinginaqueousorotheraggressiveenvironments.1.3Materialsthatcanbetestedbythistestmethodarenotlimitedbythicknessorbystrengthaslongasspecimensareofsufficientthicknessandplanarsizetomeetthesizerequire-mentsofthistestmethod.1.4Arangeofspecimensizeswithproportionalplanardimensionsisprovided,butsizemaybevariableandadjustedforyieldstrengthandappliedforce.Specimenthicknessisavariableindependentofplanarsize.1.5Specimenconfigurationsotherthanthosecontainedinthistestmethodmaybeused,providedthatwell-establishedstressintensitycalibrationsareavailableandthatspecimendimensionsareofsufficientsizetomeetthesizerequirementsofthistestmethodduringtesting.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1141PracticeforthePreparationofSubstituteOceanWaterE8/E8MTestMethodsforTensionTestingofMetallicMa-terialsE399TestMethodforLinear-ElasticPlane-StrainFractureToughnessKIcofMetallicMaterialsE647TestMethodforMeasurementofFatigueCrackGrowthRatesE1823Te...
