Title of article :
Characterization of Microstructures and Tensile Properties of Recycled Al-Si-Cu-Fe-Mn Alloys with Individual and CombinedAddition of Titanium and Cerium
Author/Authors :
Tian, Jun School of Mechanical Engineering - Dongguan University of Technology - Dongguan - Guangdong, China , Wang, Kang School of Mechanical Engineering - Dongguan University of Technology - Dongguan - Guangdong, China , Li, Wenfang School of Mechanical Engineering - Dongguan University of Technology - Dongguan - Guangdong, China , Huang, Yi School of Mechanical Engineering - Dongguan University of Technology - Dongguan - Guangdong, China , Tang, Peng School of Resources - Environment and Materials - Guangxi University - Nanning - Guangxi, China , Zhao, Yanjun School of Resources - Environment and Materials - Guangxi University - Nanning - Guangxi, China
Abstract :
IndividualandcombinedadditionofTiandCeontherecycledAl-Si-Cu-Fe-Mnalloywasconducted.Themicrostructuresandtensilepropertiesofthesefabricatedalloyswereinvestigated.InthecaseofTiorCewhichwasindividuallyadded,theaddedamountwasrangingfrom0.03wt.%to0.09wt.%.ThecombinedadditionofTiandCewassetattheratiosof1:1,1:3,and3:1withatotalamountof0.12wt.%.Microstructuresandphasesofthesealloyswereinvestigatedbyusinganopticalmicroscope,X-raydiffractiontesting,andSEMcoupledwithEDS.ThemorphologiesofthesealloyswerequantifiedbyanalyzingtheSDASvalue,lengthofsecondaryphases,andphases’distributionuniformity.Tensiletestingwascarriedoutforunderstandingthestrengtheneffectofthemodificationprocess.ResultsshowthattheadditionofCewasfavorabletothestrengthand%elongationbecausethecoarseneedle-likephaseandthepolyhedralphasewereeffectivelyrefined.TheirSDASvaluesanddistributionfactorwereremarkablydeclinedwiththeincreaseoftheCelevel.TheTiadditioncouldalsorefinethesecondaryphasesandSDASvalues.ButitseffectwasnotasprominentastheadditionofCe.CombinedadditionofTiandCeelementsattheratioof1:3resultedinthesamplesreachingmaximumcomprehensivetensileproperties.Inthiscase,theshortneedle-likephasewasuniformlydistributedinthemicrostructure.FewpolyhedralphasescouldbefoundintheAl-Si-Cu-Fe-Mnmatrix.Thestrengtheningofthesefabricatedmaterialswasduetothegrainrefinementforα-Alandmodificationforcoarsesecondaryphases.Inaddition,distributionuniformityofsecondaryphaseswasalsochangedbytheirmodificationeffects.
Keywords :
Characterization , Microstructures , Tensile Properties , Recycled Al-Si-Cu-Fe-Mn Alloys , Individual and Combined Addition , Titanium and Cerium , Ti
