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【英文标准名称】:StandardTestMethodforInstrumentedImpactTestingofMetallicMaterials
【原文标准名称】:金属材料的仪器化冲击试验的标准试验方法
【标准号】:ASTME2298-2009
【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】:E28.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:fractureappearance;impacttest;instrumentedimpacttesting;miniaturizedCharpytest;notchedspecimens;pendulummachine
【摘要】:InstrumentedimpacttestingprovidesanindependentmeasurementofthetotalabsorbedenergyassociatedwithfracturingCVNorMCVNspecimensfortestmachinesequippedwithadialand/oropticalencoder.InstrumentedimpacttestingisparticularlyeffectiveinMCVNtestingsincetheresolutionofacalibratedstrain-gagedstrikerdoesnotnecessarilydecreasewiththemagnitudeofthemeasuredenergy.Inadditiontoprovidinganmeasureoftotalabsorbedenergy(Wt),instrumentedtestingenablesthedeterminationofcharacteristicforce,energy,anddisplacementparameters.Dependingonthematerialandtesttemperature,theseparameterscanprovideveryusefulinformation(inadditiontototalabsorbedenergy)onthefracturebehaviorofmaterialssuchas:thetemperaturewhichcorrespondstotheonsetofthelowershelf;thetemperaturewhichcorrespondstotheonsetoftheuppershelf;thepre-maximumforceenergy(Wm);thepost-maximumforceenergy;theenergyassociatedwithshearliptearingafterbrittlefracture;thegeneralyieldforce(Fgy);theforceatbrittlefractureinitiation(Fbf);thearrestforce(Fa).Theinstrumenteddatamayalsobeusedtohighlighttestresultswhichshouldbediscardedonthebasisofmisalignmentorothercriticaltestfactors.1.1ThisstandardestablishestherequirementsforperforminginstrumentedCharpyV-Notch(CVN)andinstrumentedMiniaturizedCharpyV-Notch(MCVN)impacttestsonmetallicmaterials.Thismethod,whichisbasedonexperiencedevelopedtestingsteels,providesfurtherinformation(inadditiontothetotalabsorbedenergy)onthefracturebehaviorofthetestedmaterials.MinimumrequirementsaregivenformeasurementandrecordingequipmentsuchthatsimilarsensitivityandcomparabletotalabsorbedenergymeasurementstothoseobtainedinTestMethodsE23andE2248areachieved.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:9P.;A4
【正文语种】:英语