Correct Answer - Option 1 : Fusibility
The mechanical properties of materials define the behaviour of materials under the action of external forces called loads. The common mechanical properties are given below:
- Malleability is the property by virtue of which a material may be hammered or rolled into thin sheets without rupture. This property generally increases with the increase of temperature.
- Malleability is the ability of a metal to exhibit large deformation or plastic response when being subjected to a compressive force.
- Lead, soft steel, wrought iron, copper, and aluminium are some materials in order of diminishing malleability.
- Ductility is the property of the material that enables it to be drawn out or elongated to an appreciable extent before rupture occurs.
- The percentage elongation or percentage reduction in the area before the rupture of a test specimen is the measure of ductility. Normally if a percentage elongation exceeds 15% the material is ductile and if it is less than 5% the material is brittle.
- Lead, copper, aluminium, mild steel are typical ductile materials.
Tenacity is the resistance of a mineral to breaking, crushing or bending. It can be described with the help of the following terms:
This is the ease with which materials will melt.
Solder melts easily and so has the property of high fusibility. On the other hand, fire bricks used for furnace linings only melt at very high temperatures and so have the properties of low fusibility.
The following are the mechanical properties of materials.
- Impact strength
- Electrical conductivity
- Melting temperature
- Temperature stability