ASTM E2714-2009 蠕变疲劳试验的标准试验方法

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【英文标准名称】:StandardTestMethodforCreep-FatigueTesting
【原文标准名称】:蠕变疲劳试验的标准试验方法
【标准号】:ASTME2714-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E08.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:龟裂形成
【英文主题词】:crackformation;creep;creep-fatiguedamage;cyclicdeformation;earlycrackgrowth;fatigue;metallicmaterials
【摘要】:Creep-fatiguetestingistypicallyperformedatelevatedtemperaturesandinvolvesthesequentialorsimultaneousapplicationoftheloadingconditionsnecessarytogeneratecyclicdeformation/damageenhancedbycreepdeformation/damageorviceversa.Unlesssuchtestsareperformedinvacuumoraninertenvironment,oxidationcanalsoberesponsibleforimportantinteractioneffectsrelatingtodamageaccumulation.Thepurposeofcreep-fatiguetestscanbetodeterminematerialpropertydatafor(a)assessmentinputdataforthedeformationanddamageconditionanalysisofengineeringstructuresoperatingatelevatedtemperatures(b)theverificationofconstitutivedeformationanddamagemodeleffectiveness(c)materialcharacterization,or(d)developmentandverificationofrulesfornewconstructionandlifeassessmentofhigh-temperaturecomponentssubjecttocyclicservicewithlowfrequenciesorwithperiodsofsteadyoperation,orboth.Ineverycase,itisadvisabletohavecomplementarycontinuouscyclingfatiguedata(gatheredatthesamestrain/loadingrate)andcreepdatadeterminedfromtestconductedasperPracticeE139forthesamematerialandtesttemperature(s).Theprocedureisprimarilyconcernedwiththetestingofroundbartestspecimenssubjected(atleastremotely)touniaxialloadingineitherforceorstraincontrol.Thefocusoftheprocedureisontestsinwhichcreepandfatiguedeformationanddamageisgeneratedsimultaneouslywithinagivencycle.Datawhichmaybedeterminedfromcreep-fatiguetestsperformedundersuchconditionsmaycharacterize(a)cyclicstress-straindeformationresponse(b)cycliccreep(orrelaxation)deformationresponse(c)cyclichardening,cyclicsofteningresponseor(d)cyclestocrackformation,orboth.4.3WhilethereareanumberoftestingStandardsandCodesofPracticethatcoverthedeterminationoflowcyclefatiguedeformationandcyclestocrackinitiationproperties(SeePracticeE606,BS7270:2000,JISZ2279x2013;1992,PrEN3874,1998,PrEN3988x2013;1998,ISO12106x2013;2003,ISO12111x2013;2005,andPracticeE2368-04and(1,2,3),someofwhichprovideguidancefortestingathightemperature(forexample,PracticeE606,ISO12106x2013;2003,andPracticeE2368-04,thereisnosinglestandardwhichspecificallyprescribesaprocedureforcreep-fatiguetesting.1.1Thistestmethodcoversthedeterminationofmechanicalpropertiespertainingtocreep-fatiguedeformationorcrackformationinnominallyhomogeneousmaterials,orbothbytheuseoftestspecimenssubjectedtouniaxialforcesunderisothermalconditions.Itconcernsfatiguetestingatstrainratesorwithcyclesinvolvingsufficientlylongholdtimestoberesponsibleforthecyclicdeformationresponseandcyclestocrackformationtobeaffectedbycreep(andoxidation).Itisintendedasatestmethodforfatiguetestingperformedinsupportofsuchactivitiesasmaterialsresearchanddevelopment,mechanicaldesign,processandqualitycontrol,productperformance,andfailureanalysis.Thecycliccondi......
【中国标准分类号】:H22
【国际标准分类号】:19_060
【页数】:14P.;A4
【正文语种】:英语