Engineering Materials
Addition of lead and bismuth to aluminium results in

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

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Engineering Materials
Recrystallization temperature is one

At which new spherical crystals first begin to form from the old deformed one when a strained metal is heated
At which crystals grow bigger in size
At which change of allotropic form takes place
At which crystals first start forming from molten metal when it is cooled

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