

Deformation Twinning Mechanisms in FCC and HCP Metals
Abstract
We report recent work on twinning and detwinning in fcc and hcp metals based on the in situ and ex situ TEM observations and molecular dynamics simulations. Three aspects are discussed in this paper. (1) Detwinning in single-phase Cu with respect to growth twins, (2) deformation twinning in Ag-Cu composites, and (3) deformation twinning mechanisms in hcp metals. The main conclusion is that the atomic structures of interfaces (twin boundaries, two-phase interfaces, and grain boundaries) play a crucial role in nucleating and propagating deformation twins.
Keywords
twinning; de-twinning, interfaces; fcc; hcpText