title: High resolution transmission electron microscope observation of zero-strain deformation twinning mechanisms in Ag.
abstract: We have observed a new deformation-twinning mechanism using the high resolution transmission electron microscope in polycrystalline Ag films, zero-strain twinning via nucleation, and the migration of a Σ3{112} incoherent twin boundary (ITB). This twinning mechanism produces a near zero macroscopic strain because the net Burgers vectors either equal zero or are equivalent to a Shockley partial dislocation. This observation provides new insight into the understanding of deformation twinning and confirms a previous hypothesis: detwinning could be accomplished via the nucleation and migration of Σ3{112} ITBs. The zero-strain twinning mechanism may be unique to low staking fault energy metals with implications for their deformation behavior.
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China.
authors.forename: L
authors.initials: L
authors.lastname: Liu
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: S K
authors.initials: SK
authors.lastname: Gong
authors.forename: S X
authors.initials: SX
authors.lastname: Mao