High density nano-scale twins in Cu induced by dynamic plastic deformation

• DOI: 10.1016/j.scriptamat.2005.05.022
• Publication Date: 2005-06-24T09:42:03Z
• Authors: W ZHAO; N TAO; J GUO; Q LU; K LU
• Keywords: Elongation; Liquid nitrogen

Abstract Flaw-free bulk Cu specimens with a high density of nano-scale mechanical twins were produced by means of dynamic plastic deformation at liquid nitrogen temperature. The nano-twinned Cu exhibits a tensile yield strength of 600 MPa and an elongation-to-failure of 11%. The significant strengthening originates from the effective blockage of glide dislocations by numerous twin boundaries and dislocations.