Testing materials - Reece

• - Brittle
• - Ductile
• - Malleable
• - Hard
• - Stiff
• - Tough

If you apply a force to a brittle material, it WILL NOT deform plastically. However if there is enough force applied it will suddenly snap, they are also quite weak if they have cracks in them. e.g a chocolate bar is a brittle material - Break individual chunks of chocolate without the whole bar changing shape. Also ceramics (glass) shatter.

• - You can change the shape of ductile materials
• - They keep their shape when there deformed in this way.
• - An example of a ductile material is copper
• - Ideal for electric wires

• - Their shape can be changed fairly easily e.g hammering or rolling
• - Malleable materials will not keep their strength
• - Gold is an exaple of a malleable metal

They are very resistant to cutting, indentation and abrasion

- They can be used as cutting tools often made by harden steel and diamond

Stiff materials have a high resistance to bending and stretching

- Changing the shapes of stiff materials