The properties of many metals and alloys in engineering applications vary depending on the atomic, crystalline and microstructure of these materials. Mechanical properties are inherently shaped by the size, shape and distribution of the microcomponents of metals and alloys. The microstructure in equilibrium can be predicted by looking at the equilibrium diagrams of metals or alloys. In practical terms, the mechanical properties can be changed as desired by various heat treatments. These heat treatment processes involve raising a metal or alloy to a certain temperature, holding it at that temperature for the required time, and finally cooling it from that temperature. If necessary, this solid-state process can be repeated multiple times. In short, the heat treatment process is the name given to the heating and cooling operations performed to obtain the desired mechanical properties of metals or alloys.

The following changes can occur in the properties of metal alloys by heat treatment:

 

• Ductility Gain

• Elimination of Internal Stresses

• Refinement of Grain Sizes

• Increased Hardness and Tensile Strength

• Development in Satiety

• Improvement of workability

• Change in Magnetic and Electrical Properties

• Recrystallisation After Cold Deformation