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【英文标准名称】:StandardPracticeforNeutronRadiationDamageSimulationbyCharged-ParticleIrradiation
【原文标准名称】:用带电粒子照射法模拟中子辐射损害的标准实施规程
【标准号】:ASTME521-1996(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:E10.08
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:accelerators;beamheating;chargedparticleirradiation;damagecalculations;dosimetry;transmissionelectronmicroscopy;ionirradiation;metallography;microstructure;radiationdamagecorrelation;radiationdamagesimulation;voidswelling
【摘要】:Acharacteristicadvantageofcharged-particleirradiationexperimentsisprecise,individual,controlovermostoftheimportantirradiationconditionssuchasdose,doserate,temperature,andquantityofgasespresent.Additionalattributesarethelackofinducedradioactivationofspecimensand,ingeneral,asubstantialcompressionofirradiationtime,fromyearstohours,toachievecomparabledamageasmeasuredindisplacementsperatom(dpa).Animportantapplicationofsuchexperimentsistheinvestigationofradiationeffectsinnot-yet-existingenvironments,suchasfusionreactors.Theprimaryshortcomingofionbombardmentsstemsfromthedamagerate,ortemperaturedependencesofthemicrostructuralevolutionaryprocessesincomplexalloys,orboth.Itcannotbeassumedthatthetimescalefordamageevolutioncanbecomparablycompressedforallprocessesbyincreasingthedisplacementrate,evenwithacorrespondingshiftinirradiationtemperature.Inaddition,theconfinementofdamageproductiontoathinlayerjust(often8764;1x03BC;m)belowtheirradiatedsurfacecanpresentsubstantialcomplications.Itmustbeemphasized,therefore,thattheseexperimentsandthispracticeareintendedforresearchpurposesandnotforthecertificationorthequalificationofequipment.Thispracticerelatestothegenerationofirradiation-inducedchangesinthemicrostructureofmetalsandalloysusingchargedparticles.TheinvestigationofmechanicalbehaviorusingchargedparticlesiscoveredinPracticeE821.1.1Thispracticeprovidesguidanceonperformingcharged-particleirradiationsofmetalsandalloys.Itisgenerallyconfinedtostudiesofmicrostructuralandmicrochemicalchangescarriedoutwithionsoflow-penetratingpowerthatcometorestinthespecimen.Densitychangescanbemeasureddirectlyandchangesinotherpropertiescanbeinferred.Thisinformationcanbeusedtoestimatesimilarchangesthatwouldresultfromneutronirradiation.Moregenerally,thisinformationisofvalueindeducingthefundamentalmechanismsofradiationdamageforawiderangeofmaterialsandirradiationconditions.1.2Thewordsimulationisusedhereinabroadsensetoimplyanapproximationoftherelevantneutronirradiationenvironment.Thedegreeofconformitycanrangefrompoortonearlyexact.Theintentistoproduceacorrespondencebetweenoneormoreaspectsoftheneutronandchargedparticleirradiationssuchthatfundamentalrelationshipsareestablishedbetweenirradiationormaterialparametersandthematerialresponse.1.3Thepracticeappearsasfollows:
Section
Apparatus
4
SpecimenPreparation
5-10
IrradiationTechniques(includingHeliumInjection)
11x2013;12
DamageCalculations
13
PostirradiationExamination
14-16
ReportingofResults
17
CorrelationandInterpretation
18-22