Properties of material

Different properties of material will be learnt in easy discription with pictures

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

2. Physical properties Colour Specific Heat Density Thermal Conductivity Electrical Conductivity Melting

3. Physical properties C olour – light wave length S pecific heat – t he heat required to raise the temperature of one gram of a substance by one degree centigrade (J/kg K)

4. D ensity – mass per unit volume expressed in such units as kg/cm 3 D = m/v. The mass of atoms, their size, and how they are arranged determine the  density  of a substance.  Objects with the same volume but different mass have different  densities .

5. DENSITY OF DIFFERENT SUBSTANCES

6. T hermal conductivity –rate at which heat flows through a given material (W/m K). In other words it is the ability of the material to transfer heat through the process of conduction

7. M elting point – a temperature at which a solid begins to liquify. Boiling point  of a substance is the temperature at which the vapour pressure of the liquid equals the pressure surrounding the liquid and the liquid changes into a vapour.

8. E lectrical conductivity   is the ability of electric current to flow through a material. Conductors, such as copper, other metals have a high electrical conductivity and therefore can easily have electrons pass through them.

9. Mechanical p r operties Tensile Strength Ductility Malleability Brittleness Elasticity Plasticity Toughness Hardness Machinability

10. T ensile strength – measures the force required to pull something such as rope,wire or a structural beam to the point where it breaks

11. Ductility A   ductile  substance can be drawn into a wire. It is a physical property of a material associated with the ability to be stretched into wire without breaking Examples : Most metals are good examples of  ductile materials , including gold, silver, copper, erbium, terbium, and samarium .

12. Malleability  is a substance's ability to deform under pressure (compressive stress). If   malleable , a material may be flattened into thin sheets by hammering or rolling. Examples of  malleable  metals are gold, iron, aluminum, copper, silver, and lead .

13. Brittleness I t is the ability of a material when subjected to stress, it breaks without significant plastic deformation Brittle materials absorb relatively little energy prior to fracture, even those of high strength.

14. E lasticity – T he property of a material that returns to its original shape after removal of stress.

15. P lasticity - The property of a material that does not returns to its original shape after removal of stress.

16. T oughness – the ability of a material to absorb energy and plastically deform without fracturing

17. H ardness – the property of being rigid and resistant to pressure; not easily scratched

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

19. Chemical properties Corrosion resistance Errosion resistance

20. Chemical properties corrosion resistance - a material's ability to resist deterioration caused by exposure to an environment. Errosion resistance – a material being erroded by wind ,water or other natural agents.