Engineering Materials
Process of Austempering results in

Carburised structure
Lamellar layers of carbide distributed throughout the structure
Formation of bainite structure
Martenistic structure

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Engineering Materials
Points of arrest for iron correspond to

Stages at which allotropic forms change
There is nothing like points of arrest
Stages at which properties do not change with increase in temperature
Stages at which further heating does not increase temperature for some time

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