8510

7891

كارشناسي ارشد

شناسايي و انتخاب مواد

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد

1392

سيزده،85ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

محمدرضا طرقي نژاد، حسين ادريس

14/11/92

مهدي صالحي، ابوذر طاهري زاده

مهندسي مواد

ID7891

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Investigation of Microstructure and Mechanical Properties of Hybrid Composite of Aluminum Alumina Boron Carbide Produced by Rolling Processes Ali Nooryan a nooryan@ma iut ac ir June 10th 2013 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Mohammad Reza Toroghinejad Associate Professor toroghi@cc iut ac ir Hosein Edris Professor h edris@cc iut ac ir Abstract In this study hybrid aluminum alumina boron carbide composites were produced by accumulative roll bonding process Boron carbide was added to matrix in the form of powder but the alumina was introduced to matrix using anodizing process of alumina layer In order to finding the optimal amount of reinforcement particles and amount of reduction in the thickness of layers in rolling process peeling test was performed Welding efficiency values of peeling test for different samples were calculated and among them the best samples which were produced with optimal conditions were determined The microstructure of produced composite with optimal conditions was investigated using optical and scanning electron microscope Hardness uniaxial tensile and shear punch tests were performed to evaluate the mechanical properties of composites Fracture surfaces of the specimens after tensile test were investigated using scanning electron microscope The results revealed that when the number of rolling cycles increased the distribution of reinforcement particles in matrix and interfaces between particles and matrix were optimized and porosities decreased The results of mechanical tests showed that increase in reinforcement amount and number of rolling cycles result in enhancement of hardness tensile and shear strength Additionally it was shown that alterations of mechanical properties are consistent with microstructure changes Finally investigation of fracture surfaces revealed that the type of fracture is ductile with formation of shear porosities Keywords hybrid aluminum alumina boron carbide composite accumulative roll bonding process peeling test microstructure tensile strength shear punch test fracture surfaces PDF created with pdfFactory trial version www pdffactory com

محمدرضا طرقي نژاد، حسين ادريس

مهدي صالحي، ابوذر طاهري زاده