Designation:C1291−16StandardTestMethodforElevatedTemperatureTensileCreepStrain,CreepStrainRate,andCreepTime-to-FailureforMonolithicAdvancedCeramics1ThisstandardisissuedunderthefixeddesignationC1291;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftensilecreepstrain,creepstrainrate,andcreeptime-to-failureforadvancedmonolithicceramicsatelevatedtemperatures,typi-callybetween1073and2073K.Avarietyoftestspecimengeometriesareincluded.Thecreepstrainatafixedtemperatureisevaluatedfromdirectmeasurementsofthegagelengthextensionoverthetimeofthetest.Theminimumcreepstrainrate,whichmaybeinvariantwithtime,isevaluatedasafunctionoftemperatureandappliedstress.Creeptime-to-failureisalsoincludedinthistestmethod.1.2Thistestmethodisforusewithadvancedceramicsthatbehaveasmacroscopicallyisotropic,homogeneous,continu-ousmaterials.Whilethistestmethodisintendedforuseonmonolithicceramics,whisker-orparticle-reinforcedcompositeceramicsaswellaslow-volume-fractiondiscontinuousfiber-reinforcedcompositeceramicsmayalsomeetthesemacro-scopicbehaviorassumptions.Continuousfiber-reinforcedce-ramiccomposites(CFCCs)donotbehaveasmacroscopicallyisotropic,homogeneous,continuousmaterials,andapplicationofthistestmethodtothesematerialsisnotrecommended.1.3ThevaluesinSIunitsaretoberegardedasthestandard(seeIEEE/ASTMSI10).Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatarepro-videdforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C1145TerminologyofAdvancedCeramicsC127...
