Hardening (metallurgy) 2192336 223503071 2008-07-04T10:20:56Z JAnDbot 1725149 robot Adding: [[nl:Harden (metaalbewerking)]], [[sk:Kalenie]] In [[metallurgy]], '''hardening''' describes techniques to increase the [[hardness]] of a material. There are five main hardening mechanisms: * [[Hall-Petch]] hardening, a hardening that result due to a decrease in grain size. * [[Cold working]], also called stain hardening * [[Solid solution|Solid Solution strengthening]] * [[precipitation hardening]] * [[Martensite|Martensitic transformations]] All hardening mechanisms, except of the martensitic transformation, introduce dislocations or defects in a crystal lattice that act as barriers to slip. ==See also== * [[Heat treatment]] * [[Cold work]] {{engr-stub}} [[Category:Metallurgy]] [[cs:Kalení]] [[de:Härten (Stahl)]] [[es:Cementación]] [[nl:Harden (metaalbewerking)]] [[sk:Kalenie]] [[sl:Utrjanje kovin]] [[sr:Каљење]] [[sv:Härdning]]