Aerospace Materials I

-Introduction to to Materials Science & Eng. Classification of materials. Properties. Evolution of main aerospace materials. Materials requirements in structures and engines.
-Bonding in solids. Relationship between bonding, structure and properties of materials
-Crystalline systems and some definitions. Atomic positions. Directions and planes in the crystalline cells.
-Crystalline defects. Solid solutions. Polymorphism and Allotropy. Amorphous Materials
-Diffusion mechanisms. Fick¿s diffusion laws. Industrial applications examples
-Phase Diagrams: Component, phase, micro constituent. Unary or one component phase diagrams. Binary isomorphous phase diagrams. Gibbs Phase Rule. Tie line and lever rule. Non equilibrium solidification. Binary eutectic systems.
-Precipitation in solid state. Invariant reactions. Intermetallic components. Congruent and incongruent melting
-Fe-C System. Equilibrium transformations in the metastable Fe-C system. Eutectoid steels. Pearlitic transformations. Hypoeutectoid steels. Hypereutectoid steels. Influence of alloy elements in metastable Fe-C
-Ceramic phase diagrams. Ternary phase diagrams. Ternary phase diagrams in metallic alloys. Ternary phase diagrams in ceramics
- Mechanical properties: Uniaxial Tension Test. Stress-strain Curve: Elastic Zone. Plastic Zone. Slip Systems Ductility concepts. True Stress-strain Curves
- Strengthening Mechanisms. Hardness
-Electrical Properties: Classification. Diagrams of Energy-Bands. Conducting materials. Metallic conductors .Ceramic conductors. Semiconducting materials. Intrinsic. Extrinsic. Insulating materials
- MAGNETIC PROPERTIES. Origin of the magnetic behaviour of materials. Types of magnetism. ferromagnetic, ferrimagnetic; paramagnetic; diamagnetic; anti-ferromagnetic. Magnetic domains. Hysteresis cycles. Types of materials according to their hysteresis cycles. Factors affecting the hysteresis cycle. Applications. THERMAL PROPERTIES
-Ceramic materials . Structure of Ceramic Materials. Glasses. Mechanical Properties of Ceramic Materials
Processing of ceramic materials. Applications
-Polymeric materials: Chemical structure of polymers. Molecular weight and its distribution. Solid state of polymers. Crystalline polymers. Thermal transitions. Mechanical properties of polymers Viscoelasticity
Processing and practical applications of polymeric materials
-Concept of composite materials. Constituents of composite materials. Classification. Reinforcements. Particles. Composite materials reinforced with large particles. Fibres and prepregs. Mechanical properties of different reinforcement materials
-Polymer matrix in Composite Materials. Thermoset and thermoplastic matrices. Additives . Mean elastic properties of composites. Fabrication Processes. Composite materials and in Aerospace
- Mechanisms of Adhesion. Modes of failure. Types of adhesives. Processing and design considerations.