【英文标准名称】:StandardTestMethodforConductingDrop-WeightTesttoDetermineNil-DuctilityTransitionTemperatureofFerriticSteels
【原文标准名称】:开展落锤试验以测定铁素体钢无塑性转变温度的标准试验方法
【标准号】:ASTME208-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:跌落试验;延展性;铁素体;铁素体钢;机械试验;金属;钢;温度;试验;热试验
【英文主题词】:
【摘要】:Thefracture-strengthtransitionsofferriticsteelsusedinthenotchedconditionaremarkedlyaffectedbytemperature.Foragivenx201C;lowx201D;temperature,thesizeandacuityoftheflaw(notch)determinesthestresslevelrequiredforinitiationofbrittlefracture.Thesignificanceofthistestmethodisrelatedtoestablishingthattemperature,definedhereinastheNDTtemperature,atwhichthex201C;smallflawx201D;initiationcurve,Fig.1,fallstonominalyieldstrengthstresslevelswithdecreasingtemperature,thatis,thepointmarkedNDTinFig.1.Interpretationstootherconditionsrequiredforfractureinitiationmaybemadebytheuseofthegeneralizedflaw-size,stress-temperaturediagramshowninFig.1.Thediagramwasderivedfromawidevarietyoftests,bothfracture-initiationandfracture-arresttests,ascorrelatedwiththeNDTtemperatureestablishedbythedrop-weighttest.ValidationoftheNDTconcepthasbeendocumentedbycorrelationswithnumerousservicefailuresencounteredinship,pressurevessel,machinerycomponent,forged,andcaststeelapplications.FIG.1GeneralizedFractureAnalysisDiagramIndicatingtheApproximateRangeofFlawSizesRequiredforFractureInitiationatVariousLevelsofNominalStress,asReferencedbytheNDTTemperature4,51.1Thistestmethodcoversthedeterminationofthenil-ductilitytransition(NDT)temperatureofferriticsteels,5/8in.(15.9mm)andthicker.1.2Thistestmethodmaybeusedwhenevertheinquiry,contract,order,orspecificationstatesthatthesteelsaresubjecttofracturetoughnessrequirementsasdeterminedbythedrop-weighttest.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:14P.;A4
【正文语种】:


Product Code:SAE AS85049/53
Title:Connector Accessories, Electrical, Strain Relief, Nonenvironmental, Straight, Category 4C (For MIL-DTL-5015 Crimp, MIL-DTL-26482 Series 2, AS81703 Series 3, and MIL-DTL-83723 Series III Connectors)
Issuing Committee:Ae-8c1 Connectors Committee
Scope:No scope available.