Engineering Materials
Addition of silicon to aluminium results in

Improvement of casting characteristics
One of the best known age and precipitation hardening systems
Improvement of corrosion resistance
Improving machinability

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Engineering Materials
Combined carbon in iron makes the metal

Soft and gives a fine grained crystalline structure
Soft and gives coarse grained crystalline structure
Hard and gives a coarse grained crystalline structure
Hard and gives a fine grained crystalline structure

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