Title of article
EffectofVandNbonprecipitationbehaviorandmechanicalpropertiesofhighCrsteelOriginalResearchArticle
Author/Authors
TakashiOnizawa، نويسنده , , TakashiWakai، نويسنده , , MasanoriAndo، نويسنده , , KazumiAoto، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
9
From page
408
To page
416
Abstract
EmploymentofhighCrsteelasamainstructuralmaterialisconsideredasawaytoachieveeconomicalcompetitivenessoffastbreederreactors.VandNbarebelievedtoimprovethehightemperaturestrengthofhighCrsteelsbyprecipitatingascarbidesand/ornitrides,namelyfineMXparticles.However,thelongtermefficiencyandstabilityofsuchprecipitationstrengtheningmechanismsprovidedbythefineMXparticleshavenotbeenclarifiedyet.AseriesoftrialproductscontrollingVandNbcontentsisproducedandmechanicaltestsareconductedtoinvestigatetheeffectoftheseelementsonthemechanicalpropertiesandthelongtermstabilityoftheMXstrengtheningmechanism.Beforeandafteralongtermagingprocess,metallurgicalexaminationsandquantitativeanalysesareconductedtoinvestigatetheeffectoftheseelementsonmicrostructureevolutions.Basedontheseresults,thelongtermefficiencyandstabilityofthestrengtheningmechanismsprovidedbythefineMXparticlesarediscussed.HigherstrengthandlowerductilityareobtainedwiththeincreasesofVandNbcontents,althoughtheinfluenceofNbcontenttendstobesaturatedatabout0.01mass%.MXdoesnotgrowandanynewprecipitatescannotbeobservedafteragingat873Kfor6000h.Therefore,itisexpectedthatMXisstableafteragingat823Kforapproximately167,000hbasedonLarson-Millerparameter.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895013
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