مجتبی اسماعیل زاده

In thepresentstudy,microstructuresandmechanicalpropertiesofafrictionstirweldedleanduplex stainlesssteelwereexamined.Theplateswith1.5mmthicknesswereweldedataconstantrotation speed of800rpmandweldingspeedsof50,100and150mm/minusingWC-basetool.Theresults showedthatmicrostructuresandmechanicalpropertiesoftheleanduplexstainlesssteeljointswere significantlyaffectedbyweldingconditions.Increasingtheweldingspeeddecreasedthepeak temperatureandthegrainsizeofthe a and g in theweldzone,andhence,improvedhardnessvalue and tensilestrengthofthestirzone.Tensilespecimenswerefailedfromthebasemetalatthe retreatingside.