基本信息
| 标准名称： | 乙草胺乳油 |
| 中标分类： |
化工 >>
化肥、农药 >>
农药 |
| ICS分类： |
农业 >>
杀虫剂和其他农用化工产品
|
| 发布日期： | 1993-07-05 |
| 实施日期： | 1994-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2010-01-20 |
| 出版日期： | 1900-01-01 |
| 页数： | 7页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 化工 化肥 农药 农药 农业 杀虫剂和其他农用化工产品
【英文标准名称】:StandardPracticeforStrainControlledThermomechanicalFatigueTesting
【原文标准名称】:应变控制式热机械疲劳试验的标准实施规程
【标准号】:ASTME2368-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:Strain-controlledtesting;Thermomechanicalfatiguetesting(TMF)
【摘要】:Intheutilizationofstructuralmaterialsinelevatedtemperatureenvironments,componentsthataresusceptibletofatiguedamagemayexperiencesomeformofsimultaneouslyvaryingthermalandmechanicalforcesthroughoutagivencycle.Theseconditionsareoftenofcriticalconcernbecausetheycombinetemperaturedependentandcycledependent(fatigue)damagemechanismswithvaryingseverityrelatingtothephaserelationshipbetweencyclictemperatureandcyclicmechanicalstrain.Sucheffectscanbefoundtoinfluencetheevolutionofmicrostructure,micromechanismsofdegradation,andavarietyofotherphenomenologicalprocessesthatultimatelyaffectcycliclife.Thestrain-controlledthermomechanicalfatiguetestisoftenusedtoinvestigatetheeffectsofsimultaneouslyvaryingthermalandmechanicalloadingsunderidealizedconditions,wherecyclictheoreticallyuniformtemperatureandstrainfieldsareexternallyimposedandcontrolledthroughoutthegagesectionofthespecimen.1.1Thispracticecoversthedeterminationofthermomechanicalfatigue(TMF)propertiesofmaterialsunderuniaxiallyloadedstrain-controlledconditions.Ax201C;thermomechanicalx201D;fatiguecycleisheredefinedasaconditionwhereuniformtemperatureandstrainfieldsoverthespecimengagesectionaresimultaneouslyvariedandindependentlycontrolled.ThispracticeisintendedtoaddressTMFtestingperformedinsupportofsuchactivitiesasmaterialsresearchanddevelopment,mechanicaldesign,processandqualitycontrol,productperformance,andfailureanalysis.Whilethispracticeisspecifictostrain-controlledtesting,manysectionswillprovideusefulinformationforforce-controlledorstress-controlledTMFtesting.1.2Thispracticeallowsforanymaximumandminimumvaluesoftemperatureandmechanicalstrain,andtemperature-mechanicalstrainphasing,withtherestrictionbeingthatsuchparametersremaincyclicallyconstantthroughoutthedurationofthetest.Norestrictionsareplacedonenvironmentalfactorssuchaspressure,humidity,environmentalmedium,andothers,providedthattheyarecontrolledthroughoutthetest,donotcauselossoforchangeinspecimendimensionsintime,andaredetailedinthedatareport.1.3Theuseofthispracticeislimitedtospecimensanddoesnotcovertestingoffull-scalecomponents,structures,orconsumerproducts.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.
【中国标准分类号】:A40
【国际标准分类号】:19_060
【页数】:10P.;A4
【正文语种】:英语