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grain structure
A crystallite is a small or even microscopic crystal which forms, for example, during the cooling of many materials. Crystallites are also referred to as grains.
Bacillite is a type of crystallite. It is rodlike with parallel longulites.
The following are the purpose of heat treatment of metals EXCEPT:
Group of answer choices
to reduce external stress
to improve corrosion resistance
to increase ductility
to enhance strength