پديد آورنده :
اخوان، سعيد
عنوان :
توليد ورق آلومينيوم 5083 نانو ساختار به روش نورد تجمعي-پيوندي و ارزيابي زير ساختار خواص مكانيكي و بافت
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب مواد
محل تحصيل :
اصفهان:دانشگاه صنعتي اصفهان،دانشكده مواد
صفحه شمار :
ده،130ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
فخرالدين اشرفي زاده،محمدرضا طرقي نژاد
توصيفگر ها :
تغيير شكل پلاستيكي شديد , ARB , استحكام كششي , شكست نگاري
تاريخ نمايه سازي :
30/9/88
استاد داور :
خسروفرمنش،محمود مرآتيان
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
چكيده انگليسي Production of nano structured 5083 aluminum alloy By ARB process and evaluation microstructure mechanical Properties and texture Saeid Akhavan s a metallurg@ma iut ac ir October 17 2009 Department of Materials Engineering Isfahan University of Technology 84156 83111 Isfahan IranDegree M Sc Lamguage FarsiDr Fakhroddin Asgrafizade Assoc Prof Supervisor E mail Dr Mohamad Reza Torighinejad Assoc Prof Supervisor E mail toroghi@cc iut ac irAbstractAccumulative roll bonding ARB is a severe plastic deformation process for achievingultra fine grains in metallic sheets without changing the sample dimensions In this study ARB process was carried out on 5083 aluminum alloy sheets up to 6 cycles In thisprocess the surfaces of the strips to be joined are roughened and cleaned and then stacked After stacking the specimen is roll bonded by rolling using a 50 reduction The rolledspecimen is cut into two halves and the above mentioned procedure is repeated for severaltimes Microstructural characterizations were analyzed by transmition electron microscopy TEM Tension and Vickers hardness tests were performed on produced sheets forevaluating their mechanical properties In order to clarify the failure mode fracturesurfaces after tensile tests were observed by scanning electron microscopy SEM Moreover the texture parameter of the ARB ed samples was calculated using their XRDpatterns and the related equation Additionally the texture evolution during the ARBprocess was demonstrate by analyzing the measured pole figures and orientationdistribution functions ODF and skeleton lines The results indicated that at the early stages of ARB process grains were subdivided bydeformation induced boundaries After several ARB cycles lamellar structure elongated inthe rolling direction contains lamellar boundaries was formed With increasing the strain mean spacing of lamellar boundaries decreased Finally continuous recrystallizationresulted in a microstructure covered with small recrystallized grains with an averagediameter below 100 nm at the end of four cycle The tensile strength and hardness of the 6
استاد راهنما :
فخرالدين اشرفي زاده،محمدرضا طرقي نژاد
استاد داور :
خسروفرمنش،محمود مرآتيان
