Plastic deformation properties
- whereby a material can be plastic deformed and shaped when cold
A malleable material can be plastic shaped with hammering or rolling without fracture.
Typical malleable materials:
- mild steel, gold, lead
- whereby a material will fracture without appreciable prior plastic deformation
Brittleness is lack of ductility and for a brittle material there is no plastic deformation. The elastic stage is followed by immediate fracture.
Typical brittle materials:
- glass, concrete, ceramics, stone, cast iron
- whereby a material can be plastic deformed by elongation without fracture
Ductile materials can typically be plastic elongated with more than 15% before they fracture.
Typical ductile materials:
- copper, mild steel, thermoplastics