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Stress corrosion cracking behavior of 310S in supercritical water with different oxygen concentrations

【摘要】Theeffectofdissolvedoxygen(DO)onthestresscorrosioncracking(SCC)of310Sinsupercriticalwaterwasinvestigatedusingslow-strain-ratetensiletests.Thetensileproperties,fracturemorphology,anddistributionofthechemicalcompositionoftheoxidewereanalyzedtoevaluatetheSCCsusceptibilityof310S.TheresultsshowedthattheruptureelongationdecreasedsignificantlyasthedegreeofDOincreased.Abrittlefracturemodewasobservedonthefracturesurface,andonlyintergranularcrackingwasobservedonthesurfaceofthegaugesection,regardlessoftheDO.Crackswerewidelydistributedonthegaugesurfacenearthefracturesurface.Oxideswereobservedinthecrackswithtwo-layeredstructures,i.e.,aCr-richinneroxidelayerandanFe-richouteroxidelayer.

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34 共7页 核技术:英文版 2018年5期 免费 中文科技期刊数据库

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