7191

6697

كارشناسي ارشد

شناسايي و انتخاب مواد

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد

1391

دوازده، 96ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

محمدرضا طرقي نژاد، عباس نجفي زاده

10/8/91

احمد كرمانپور، قاسم ديني

1396/09/20

كتابنامه

مواد

مهندسي مواد

ID6697

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Fabricating Cu SiCp Nano Composite by Accumulative Roll Bonding ARB and Continual Annealing and Roll Bonding CAR Processes and Studying its Microstructure Physical and Mechanical Properties Omid ghaderi o ghaderi@ma iut ac ir April 16 2012 Department of Materials Engineering Isfahan University of Technology 84156 83111 Isfahan IranDegree M Sc Language FarsiDr Mohammad Reza Toroghinejad Assoc Prof Supervisor E mail toroghi@cc iut ac irDr Abbas Najafizadeh Prof Supervisor E mail a najafi@cc iut ac irAbstractIn this study two different methods of plastic deformation including a accumulative roll boning ARB and b continual annealing and roll bonding CAR processes were used for the fabricationof copper silicon carbide composite ARB and CAR processes were applied successfully for ninecycles on the Cu strips and SiC particles were distributed between them Peeling test was utilizedfor the evaluation of bond strength between copper layers and effective parameters on it Fracturesurfaces of the layers after the test were studied by optical microscopy and scanning electronmicroscopy Furthermore the quality of bonding and distribution of powder between layers incomposite samples during production process were investigated by optical microscopy Equiaxedtensile and vickers hardness tests were carried out for the measurement of mechanical properties ofthe samples Also scanning electron microscopy was applied for the determination of fracturemechanism of the samples after the tensile test Texture parameter was investigated by X rayanalysis Electrical resistance of samples was measured by four probe instrument For crystallitesize determination of samples produced by ARB and CAR processes rietveld method and MAUDsoftware were used The results indicated that when the cycles number of processes was increased the porosities were decreased and the bonding quality between the layer of copper strips wereincreased Also the distribution of SiC particles in the Copper matrix was improved by increasingthe number of cycles Morever the tensile strength of produced composites was enhanced byproceeding the process and finally reached to 483 MPa after nine cycles Elongation of compositesamples decreased dramatically in the first step of composite production by ARB and CARprocesses but it improved by proceeding the process till ninth cycle Investigation of fracturesurfaces after tensile test by SEM revealed that the failure mode in produced composites by bothARB and CAR processes was of the shear ductile rupture type Studying the texture of the samplesshowed that for samples produced by CAR process the dominant texture is 111 while forsamples produced by ARB it is 100 Electrical resistance of the annealed raw copper andcomposites produced by CAR and ARB processes was equal to 48 69 and 61 respectively The crystallites size that measured by MAUD software for copper and the composite produced bynine cycles of ARB process reached to 111 nm and 89 nm respectively The results of mesurmentsby rietveld method were compared with findings of the other researchers Therfore it was obviousthat the grain size of produced composite by ARB process is less than 100 nm Keywords copper silicon carbide composite Accumulative roll bonding ARB Continualannealing and roll bonding CAR Bond strength Microstructure Mechanical properties Fractography texture parameter electrical resistance Reitveld method

محمدرضا طرقي نژاد، عباس نجفي زاده

احمد كرمانپور، قاسم ديني