11722

10754

كارشناسي ارشد

شناسايي و انتخاب و روش ساخت مواد

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد

1395

چهارده،[58]ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

فتح الله كريم زاده

علي اشرفي

محمدعلي گلعذار، محمدحسين عنايتي

1395/08/16

كتابنامه

مهندسي مواد

ID10754

Fabrication of Al5083 Graphen based surface nanocomposite by friction stir processing method and investigating of its properties Nastaran Naghshekesh Email address nasi naghshekesh@yahoo com Date July 11 2016 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language PersianSupervisors Fatollah Karimzadeh Professor karimzadeh f @cc iut ac irAbstractIn the current research Surface nanocomposite containing graphene oxide performed on thesurface of 5083Al alloy was investigated by using of friction stir processing FSP andmicrostructure mechanical and tribological properties were evaluated For this purpose the frictionstir processing with 315 rpm rotational speed 20 mm min linear speed 2 degrees tool angle relativeto the vertical axis were performed on the base alloy Since the application of this process causedsevere grain refinement from the first pass in all samples the number of passes was introduced asan influential parameter After the third pass which determines the optimal pass the effect ofreinforcement intensity on the microstructural mechanical and wear behaviorwere studied For thispurpose after creating depth of 2 mm and the width of 1mm grooves on the surface of the alloysamples that contain the reinforcement particles of graphene oxide with the values of one three five and seven percent friction stir process was performed and The surface nanocomposites werecreated Comparison of the base metal bare processed sample and nanocomposite processed forthree passes showed the highest increase in hardness and ultimate tensile strength in the samplewhich has five percent reinforcement In order to determine the effects of the surface properties ofsamples reciprocating wear test performed on base metal and nanocomposites for three passes andtheir wear behavior were studied by scanning electron microscopy The results of theseinvestigations showed that the dominant mechanism of wear has been adhesive wear In addition the sample with five percent reinforcement had the highest wear resistance and the base metalsample had the lowest wear resistance SEM images of the failed surface of the base metal andprocessed samples containing reinforcement particles indicated that ductile failure is occurred in allsamples Keywords Nanocomposite Friction Stir Processing Graphene Oxide Wear Hardness TensileStrength

فتح الله كريم زاده

علي اشرفي

محمدعلي گلعذار، محمدحسين عنايتي