Correct option is D
Toughness is the ability of a metal to absorb energy and withstand sudden impact or shock loads without fracturing. It is a combination of strength and ductility, allowing the material to deform rather than break when subjected to impact.
· Example: Spring steel, mild steel, and structural steel are tough materials used in automobile parts, tools, and heavy machinery where impact resistance is required.
· Test: Izod and Charpy impact tests are used to measure toughness.
