The property of a metal to draw it into thin sheets is termed as ________.

Question

Question

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ALP CBT 2 Fitter Previous Paper: Held on 21 Jan 2019 Shift 1

Answer 1

Concept:

Malleability

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.

Toughness

It is defined as the ability of the material to absorb energy before a fracture takes place.
This property is essential for machine components which are required to withstand impact loads.
Tough materials have the ability to bend, twist, or stretch before failure takes place.
Toughness is measured by Izod and Charpy impact testing machines.

Brittleness

It is the opposite of ductility.
Brittle materials show little deformation before fracture and failure occurs suddenly without any warning i.e. it is the property of breaking without much permanent distortion.
Normally if the elongation is less than 5% the material is brittle. E.g. cast iron, glass, and ceramics are typical brittle materials.

Hardness

Hardness is a measure of a metal's ability to withstand scratching, wear, and abrasion, indentation by harder bodies.