Title of article
Clarificationofstrainlimitsconsideringtheratchetingfatiguestrengthof316FRsteelOriginalResearchArticle
Author/Authors
NobuhiroIsobe، نويسنده , , MasayukiSukekawa، نويسنده , , YasunariNakayama، نويسنده , , ShingoDate، نويسنده , , TomomiOhtani، نويسنده , , YukioTakahashi، نويسنده , , NaotoKasahara، نويسنده , , HiroshiShibamoto، نويسنده , , HideakiNagashima، نويسنده , , KazuhikoInoue، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
6
From page
347
To page
352
Abstract
Theeffectofratchetingonfatiguestrengthwasinvestigatedinordertorationalizethestrainlimitasadesigncriterionofcommercializedfastreactorsystems.Ratchetingfatiguetestswereconductedat550°C.Durationoftheratchetstrainingwassetforacertainnumberofstraincyclestakingtheloadingconditionoffastreactorsintoaccount,andthenumberofcyclesforstrainaccumulationwasdefinedastheratchet-expiredcycle.Fatiguelivesdecreaseastheaccumulatedstrainbyratchetingincreases.Meanstressincreasedduringtheratchetingcycleanditsmaximumvaluedependedontheaccumulatedstrainandtheratchet-expiredcycle.Fatiguelifereductionwasnegligiblewhenthemaximummeanstresswaslessthan25MPa,correspondingtoanaccumulatedstrainof2.2%.Accumulatedstrainislimitedto2%inthepresentdesignguidelinesandthisstrainlimitisconsideredeffectivetoavoidreducingfatiguelifebyratcheting.Microcrackgrowthbehaviorswerealsoinvestigatedinthesetestsinordertodiscussthelifereductionmechanismsinratchetingconditions.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895007
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