Deformation Twinning and Detwinning in Face-Centered Cubic Metallic Materials

Deformation twinning and detwinning are widely observed in face-centered cubic (FCC) metallic materials processed by severe plastic deformation. Several twinning and detwinning mechanisms are reported in coarse-grained and nanocrystalline materials. In this article, the mechanisms for deformation-induced twinning and detwinning in FCC metallic materials, factors affecting twinning propensity, and grain-size effect on the competition between twinning and detwinning are reviewed. The effects of twinning and detwinning on mechanical properties are also reviewed.