The Stamping Formability of AZ31 Magnesium Alloy Sheet Improved by Equal-channel Angular Pressing-中国期刊网

摘要 Equalchannelangularpressing(ECAP)processingandannealingwereappliedtotheAZ31magnesiumalloysheetstoevaluatethepotentialimprovementinthemechanicalpropertiesandformability.TheECAPexperimentwasconductedat300℃inadiehavinganincludedangleof90obetweentwochannelsbytheBCZroutewiththesheetsrotatedby90°aboutthenormalaxisofplateplane.Thetensiletestsandconicalcuptestswereconductedatvarioustemperaturesfrom20to250℃.Theexperimentalresultsindicatedthatimprovingtheworkingtemperaturescouldleadtothesoftinthematerialandtheenhancementofductility.Comparatively,theECAPedAZ31alloysheetsshowedtheloweryieldstrengthandsmallerconicalcupvalue(CCV)thantheunECAPedcounterpartintheroomtemperature.Thedifferenceinyieldstrengthbetweenthembecamesmallintheelevatedtemperature,buttheECAPedsamplesstillhadthesmallerCCVvalue,implyingtheimprovedformability.ThetextureoftheAZ31alloysheetscouldbemodifiedbyECAPandthedecreaseintheyieldstrengthandmoreuniformdeformationrealizedinthematerial,sotheformabilityofAZ31alloysheetswasimproved.

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The Stamping Formability of AZ31 Magnesium Alloy Sheet Improved by Equal-channel Angular Pressing

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The Stamping Formability of AZ31 Magnesium Alloy Sheet Improved by Equal-channel Angular Pressing

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