1. Lesson 1

2.  application  design of components  material protection (from corrosion, damage, etc.)

3. 1. Physical properties 2. Mechanical properties 3. Chemical properties

4.  colour –light wave length  specific heat – the heat required to raise the temperature of one gram of a substance by one degree centigrade (J/kg K)

5. 3  density – mass per unit volume expressed in such units as kg/cm 3  thermal conductivity –rate at which heat flows through a given material (W/m K)

6.  melting point – a temperature at which a solid begins to liquify  electrical conductivity – a measure of how strongly a material opposes the flow of electric current ( Ω ⋅ m)

7.  coefficient of thermal expansion – degree of expansion divided by the change in temperature (m/°C)

8.  tensile strength – measures the force required to pull something such as rope,wire or a structural beam to the point where it breaks  ductility – a measure of how much strain a material can take before rupturing

9.  malleability – the property of a material that can be worked or hammered or shaped without breaking  brittleness –breaking or shattering of a material when subjected to stress (when force is applied to it)

10.  elasticity – the property of a material that returns to its original shape after stress (e.g. external forces) that made it deform or distort is removed  plasticity - the deformation of a material undergoing non-reversible changes of shape in response to applied forces

11.  toughness – the ability of a material to absorb energy and plastically deform without fracturing  hardness – the property of being rigid and resistant to pressure; not easily scratched

12.  machinability – the property of a material that can be shaped by hammering, pressing, rolling

13.  corrosion resistance - a material's ability to resist deterioration caused by exposure to an environment

14. MaterialProperties aluminium rubber ceramics steel copper lead nylon cast iron wood

15. MaterialProperties aluminiumlightness ; strength rubberelasticity ; insulation ceramicsthermal resistivity steelstrength copperconductivity ; corrosion resistance leadhigh density; ductility nylonstrength ; toughness cast irondamping capacity woodinsulation ; environmental friendliness

16. MaterialApplication aluminium rubber ceramics steel copper lead nylon cast iron wood

17. MaterialApplication aluminiumfoil; aircraft; window frame rubbertyres,; seal; gasket ceramicsfurnace; brick steelsection; pipe copperpipe; cables leadstorage battery; radiation protection ballast; bullets nylonrope; clothing cast ironengine block; valves woodfurniture; deck

18. gold - 19300 kg/m 3 uranium - 19100 kg/m 3 lead - 11340 kg/m 3 steel - 7800 kg/m 3

19. MaterialTensile StrengthUTS (Ultimate Tensile Strength) carbon nanotubes 62000 MPa (theoretical300000 MPa) 48000 kNm/kg carbon fibre 5650 MPa 3200 kNm/kg glass fibre 4700 MPa 1340 kNm/kg spider web 1000 MPa 900 kNm/kg high-strength steel 1200 MPa 154 kNm/kg

20. MaterialConductivity silver 63 x 10 6 S/m (1/ohm) copper 59.6 x 10 6 S/m (1/ohm) gold 45.2 x 10 6 S/m (1/ohm) aluminium 37.8 x 10 6 S/m (1/ohm)

21. MaterialSpecific resistance (PET) polyethylene terephthalate (PET) 10 20 ohm glass 10 14 ohm rubber 10 13 ohm

22. Forging - a manufacturing process where metal is shaped by plastic deformation under great pressure into high strength parts. Casting – pouring or injecting molten metal into a mold containing a cavity with the desired shape