When is solution annealing typically performed?

Solution annealing is a heat treatment process applied to certain alloys, particularly stainless steels and some non-ferrous alloys, to enhance their mechanical properties. It involves heating the alloy to a specific temperature where the desired phase or phases dissolve into the solution, followed by rapid cooling to "trap" the dissolved elements in a homogeneous state.

This process is typically performed after the alloy is produced, as it is necessary for the material to first reach its final manufactured state. This might involve processes like casting or forming, after which solution annealing can be applied to relieve stresses or improve corrosion resistance and ductility.

Having the alloy in its finished form before solution annealing allows for optimal control over the microstructure and ensures that the treatment addresses any imperfections that may have resulted from the initial production steps. Thus, performing solution annealing after the alloy is produced is crucial for achieving the desired material characteristics.