Synthesis, Characterization and Testing of Oxygen-Free Copper (OFC) Reinforced with NiTi/Graphene/Ti3AlC2 (Max Phase) and Prediction of Optimum Conditions

Abstract

Oxygen-Free Copper (Ofc) Matrix-Based Composites Are Regarded As Favorable Materials For Manufacturing And Industrial Applications Due To Their High Electrical And Thermal Conductivity. However, Pure Copper Has A Low Modulus Of Elasticity, Poor Strength And Limited High-Temperature Applications. The Main Aim Of This Thesis Work Was To Investigate Experimentally The Mechanical And Metallurgical Behavior Of Reinforced Oxygen Free Copper(Ofc) Metal Matrix Composite With A Different Weight Percentage Of Reinforcement Particles Such As Nitinol (5,10,7.5,5,0 )Wt%, Ti3alc2 (10, 5, 7.5, 0, 5)Wt%And Graphene (4)Wt%Fabricated Through The Powder Metallurgy Route At Blending Time Of (24h), Compaction Pressure(60mpa) And Sintering Temperature Of (800 ???. The Microstructural Behaviors Of The Developed Sample Were Characterized Through An Optical Microscope (Om), Scanning Electron Microscope (Sem) And X-Ray Diffraction(X-Rd)Microscopy. The Homogenous Distribution Of Reinforcements Was Shown In The Om Micrograph And Some Voids And Grooves Were Observed In The Sem Image. The Physical, Mechanical And Tribological Properties (Density, Porosity,Hardness, Compression Strength, Corrosion Resistance, Wear Resistance And Coefficient Of Friction) Of The Cu/Niti/Ti3alc2 Were Investigated. The Experimental Test Result Shows That The Density Of Ofc Was Decreased From 8.90 To 8.021g/Cm3, The Hardness Value Was (168.6hv)Improved By 104.4% By The Addition Of 10% Niti, 5% Ti3alc2 And 4% Graphene, The Maximum Compression Strength Was 403.34mpa At The 5%Niti, 10% Ti3alc2 And Wear Rate 7.518*10-6Mm3/Nm With Coefficient Of Friction Of 0.29. From The Experimental Results, Optimum PropertiesOf The Ofc Was Obtained By The Addition Of Niti/Ti3alc2/Graphene. S1(Cu-10%Ti3alc2-5%Niti-4% Graphene) Was Selected Using Grey Relational Analysis (Gra) For The Prediction Of Optimum Condition. The Optimum Result Of Extrusion Load 4.3575x108kn And Damage Value6.8061 Were Obtained At The Optimum Parameters Of Extrusion Ratio 2, Ram Speed 1.5m/S And Billet Temperature Of 850 ???. Through Deform 3d, Response Surface Methodology (Rsm) And Genetic Algorithm (Ga). This Research Work Is Expected To Solve Different Industrial And Engineering Problems.