1. Understanding Malleability:
Malleability is the physical property of a material that allows it to deform plastically under
compressive stress. When a material is hammered or rolled, it is being "squashed" into a flatter shape. A highly malleable material can be flattened into extremely thin sheets (foil) without cracking.
2. Malleability vs. Ductility: These two terms are often confused but refer to different types of stress:
• Malleability: Response to
compression (hammering/rolling into sheets).
• Ductility: Response to
tension (stretching/pulling into thin wires).
While most ductile metals are also malleable (like Gold and Silver), they are distinct engineering properties.
3. Analyzing Other Options:
• Brittleness: The opposite of plasticity; a brittle material (like cast iron or glass) breaks with little to no deformation when stressed.
• Fatigue: The tendency of a material to break under repeated or fluctuating cycles of stress, even if those stresses are well below the ultimate strength.