1. By Jagdeep Sangwan (lect. in M.E.)
Material Properties
By Jagdeep Sangwan (lect. in M.E.)

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

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

4. Physical properties 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. Physical properties
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. Physical properties
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. Mechanical properties
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. Mechanical properties
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. Mechanical properties
machinability – the property of a material that can be shaped by hammering, pressing, rolling

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

14. Which properties do the following materials possess?
aluminium
rubber
ceramics
steel
copper
lead
nylon
cast iron
wood

15. Which properties do the following materials possess?
aluminium
lightness ; strength
rubber
elasticity ; insulation
ceramics
thermal resistivity
steel
strength
copper
conductivity ; corrosion resistance
lead
high density; ductility
nylon
strength ; toughness
cast iron
damping capacity
wood
insulation ; environmental friendliness

16. Find application for the following engineering materials:
aluminium
rubber
ceramics
steel
copper
lead
nylon
cast iron
wood

17. Find application for the following engineering materials:
aluminium
foil; aircraft; window frame
rubber
tyres,; seal; gasket
ceramics
furnace; brick
steel
section; pipe
copper
pipe; cables
lead
storage battery; radiation protection ballast; bullets
nylon
rope; clothing
cast iron
engine block; valves
wood
furniture; deck

18. material with greatest density
gold kg/m3
uranium kg/m3
lead kg/m3
steel kg/m3

19. the strongest material
Tensile Strength
UTS (Ultimate Tensile Strength)
carbon nanotubes
62000 MPa (theoretical 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. the best conductor Material Conductivity silver 63 x 106 S/m (1/ohm)
copper
59.6 x 106 S/m (1/ohm)
gold
45.2 x 106 S/m (1/ohm)
aluminium
37.8 x 106 S/m (1/ohm)

21. the best insulator Material Specific resistance
polyethylene terephthalate (PET)
1020 ohm
glass
1014 ohm
rubber
1013 ohm

22. Processes:
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