Engineering Materials
Addition of manganese 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
The unit cells

Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice
Have the same orientation and their similar faces are parallel
All of these

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