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Fracture Mechanics Investigation of MgO-C Bricks for Steelmaking by Bending and Fatigue Failure Tests Along with X-Ray CT Scan Observation
破壊試験,およびX線CTスキャンによるMgO-Cれんがの破壊力学的検討

Yuta Hino, Keisuke Yoshida, Yoshisato Kiyota, Michihiro Kuwayama
2014 Tetsu to hagane  

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Synopsis : Fatiguefailuretestswerefirstlycarriedout.ThematerialconstantderivedfromS-Ncurvewasevaluatedandcomparedwithpreviousstudy. ThecompliancemethodwassubsequentlyusedtoevaluatethefracturetoughnessofMgO-Cbrickandtherelationshipbetweenthestress factorandcrackgrowthrate.Inordertousethismethod,theeffectsofbrickcarboncontentonthecrackgrowthrateandcrackgrowthratein hightemperaturewereinvestigated.
more » ... confirmedbyX-ray CTscans,whichrevealedlargecracksinbrickswithalowercarboncontent,eveninthemiddleoffatiguefailuretests. Furthermore,thematerialconstantsobtainedfromfatiguefailuretestandK-Vdiagramwerecompared.Amaterialconstantwasderivedby evaluatingtherelationshipbetweenthecrackgrowthrateandstressintensityfactor,andtheresultwasfoundtoagreewiththevaluederived fromfatiguefailuretests.Thisresultconfirmsthatthatmaterialconstantderivedfromfatiguefailuretestsistheinherentpropertyofthematerialandcorrespondstothevariationofcrackgrowthratewithchangesinstressfactor.TheeffectsofcarboncontentinMgO-Cbrickonthe crackgrowthbehaviourandfatiguefailuremechanismwerealsoinvestigated.
doi:10.2355/tetsutohagane.100.1371 fatcat:qjvdnsgwwnbd5lpfyijave2upq
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Yuta Hino, Keisuke Yoshida, Yoshisato Kiyota, Michihiro Kuwayama. "Fracture Mechanics Investigation of MgO-C Bricks for Steelmaking by Bending and Fatigue Failure Tests Along with X-Ray CT Scan Observation." Tetsu to hagane 100.11 (2014) 1371-1379