hardening
metalwork; metallurgical metalworking process used to increase the hardness of a metal
precipitation hardening
heat treatment technique used to increase the yield strength of malleable materials
work hardening
strengthening of a metal by plastic deformation
Differential heat treatment
Metallurgical technique
Grain boundary strengthening
method of strengthening materials by changing grain size
nitriding
heat treating process that diffuses nitrogen into the surface of a metal to create a case-hardened surface
solid solution strengthening
strengthening mechanism exhibited in metallic alloys