Engineering Materials Course Contents 1. Introduction to Material Science and Engineering. 2. Crystal and Amorphous Structure in Materials: Ionic, Metallic and Covalent bonds, Space lattice and Unit cell, Simple cubic crystal structure, Body - centered cubic (BCC), Faced- centered cubic (FCC), Hexagonal close- packed (HCP), Volume, Planar, and Linear density unit-cell calculation. 3. Stress and Strain in Metals: Elastic and Plastic Deformation, Engineering Stress and Engineering Strain, Shear Stress and Shear Strain, Engineering Stress-Strain Diagram, Modulus of Elasticity (E), Yield Strength, Ultimate Tensile strength (UTS), Percent Elongation, Percent reduction in area.

Engineering Materials Course Contents 4. Phase Diagrams: Phase diagrams of pure substances, Gibbs phase rule, Cooling curves, The lever rule, Binary eutectic alloy system, Binary peritectic alloy system, Binary monotectic systems. 5. Engineering alloys: Production of iron and steel, Iron-carbon system, Low alloy steels, Aluminum alloys, Copper alloys, Stainless steels, Cast iron, Titanium alloys. 6. Polymeric materials: Polymerization reactions, industrial polymerization methods, crystallinity in thermoplastic, processing of plastic materials, General- purpose thermoplastics, Rubbers.

Engineering Materials Course Contents 7. Ceramics and Glasses: Simple ceramic crystal structures, silicate structures, Processing of ceramics, mechanical and thermal properties of ceramics, structure of glasses. 8. Composite materials and Cement: Fibers for reinforced-plastic composite materials, Concrete. 9. Corrosion and corrosion protection: Electrochemical corrosion of metals, Galvanic cells, Corrosion rates (Kinetics), Types of corrosion, Oxidation of metals, Corrosion control.

Engineering Materials ASSESSMENTS Course Works Homework 10% Quizzes 10% Class contributions 10% Mid-term exams 20% Final Examination 50% REFERENCES Smith W.F. and Hashemi J. “Foundations of Materials Science and Engineering” McGraw- Hill 4th Edition (2002). Online sources

Engineering Materials Introduction to Material Science & Engineering Materials may be defined as substances of which something is composed or made Engineering Materials refer specifically to materials used to produced technical products Engineers design most manufactured products, and since products require materials, engineers should be knowledgeable about the internal structure and properties of materials.

Engineering Materials Introduction to Material Science & Engineering Research & development engineers create new materials or modify the properties of existing ones. Design engineers use existing, modified, or new materials to design and create new products and systems. Sometimes design engineers have a problem in their design that requires a new material to be created by research engineers. Example of such cases; Engineers designing a high speed civil transport HSCT, have to develop new high temperatures materials that could withstand temperatures as high as1800 C. Space station and space shuttle materials

Engineering Materials Introduction to Material Science & Engineering Different engineers searching for different materials Mechanical Engineers search for high temperature materials so that jet engines can be more efficiently. Electrical Engineers search for new materials so that electronic devices can operate faster and at higher temperatures Aerospace Engineers search for materials with higher strength to weight ratios for vehicles. Chemical Engineers look for more highly corrosion resistant materials

Engineering Materials Introduction to Material Science & Engineering Materials Science and Engineering Material Science concerned with the research for basic knowledge about the internal structure, properties, and processing of materials Materials Engineering concerned with the use of fundamental and applied knowledge of materials so that the materials can be converted into products needed by society.

Engineering Materials Introduction to Material Science & Engineering Types of Materials Can be divided into three main or fundamental classes; Metallic Materials Polymeric Materials Ceramic Materials + Two application materials Electronic Materials Composite Materials + Advanced Materials Smart Materials Nanomaterials

Engineering Materials Introduction to Material Science & Engineering Types of Materials Metallic Materials (metals and metal alloys) Inorganic materials that are characterized by; High thermal and electrical conductivities. Crystalline structure (atoms are arranged in a an orderly manner). Relatively strong and good strength at high temperatures. Examples are iron, steel, aluminum, and copper. Alloy is a combination of two or more metals Metallic Materials can be divided into two classes; Ferrous metals and alloys : metal and alloys that contain a large percentage of iron such as steel and cast iron. Nonferrous metals and alloys : metal and alloys that do not contain iron, or relatively contain small percentage, such as copper, zinc, titanium, aluminum and nickel.

Engineering Materials Introduction to Material Science & Engineering Types of Materials Polymeric Materials Materials consisting of long molecular chain or networks of low weight elements such as carbon, hydrogen, oxygen, and nitrogen. Characterized by; Low electrical conductivities (good insulators). Mostly non crystalline Low densities Low softening or decomposition temperatures Strength and ductility vary greatly Examples are polythylene and polyvinyl chloride (PVC), Digital video disks (DVDs)

Engineering Materials Introduction to Material Science & Engineering Types of Materials Ceramic Materials Inorganic materials consisting of compounds of metals and nonmetals. Characterized by; High hardness High temperature strength Can be crystalline, non crystalline, or mixed of both. Good heat resistance Good insulative properties Examples are clay products, glass, and pure aluminum oxide. Used widely for furnace lining for heat treatment and melting of metals such as steel

Engineering Materials Introduction to Material Science & Engineering Types of Materials Composite Materials Materials that are mixtures of two or more materials. Characterized by High strength BUT have low fracture toughness, brittleness Examples are fiberglass-reinforcing material in a polyester or epoxy matrix. carbon fibers in an epoxy matrix.

Engineering Materials Composite Materials The bridge in the picture is built entirely from composite material. Weighs one-tenth of the conventional concrete bridge. It took only 18 hours to assemble the bridge.

Engineering Materials Introduction to Material Science & Engineering Types of Materials Electronic Materials Materials used in electronics especially microelectronic, Example is pure silicon that can be modified in different ways to change its electrical characteristics Pure silicon is used in the manufacture of transistors and other electronic components because, it withstands heat well and is relatively inexpensive.

Engineering Materials Introduction to Material Science & Engineering Types of Materials Advanced materials Smart materials Materials with the ability to sense and response to external environment (temperature, light, humidity, electric and magnetic field) Example is Piezoelectric ceramics, materials that produce an electric field when subjected to mechanical force.

Engineering Materials Introduction to Material Science & Engineering Types of Materials Advanced materials Nanomaterials Materials with a characteristic length scale (particle diameter, grain size, thickness) smaller than 100 nm ( ), nanomaterials can be metallic, polymeric, ceramic, electronic or composite. (A) (B) Fig. Transmission electron microscopy (TEM) results for (A) undoped P25 (0:1), and (B) S-doped P25 (1:1)