Twin-interface interactions in nanostructured Cu/Ag: Molecular dynamics study. (1st February 2018)

• Record Type: Journal Article
• Authors: Béjaud, R.; Durinck, J.; Brochard, S.
• Is Part Of: Acta materialia. Volume 144(2018)
• Page Start: 314
• Page End: 324
• Publication Date: 2018-02-01
• Subjects: Deformation twins -- Nanolayered materials -- Heterophase interfaces -- Molecular dynamics simulations; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2017.10.036
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: The interaction of deformation twins with interfaces in nanostructured Cu/Ag is studied using molecular dynamics simulations. The influence of the interface structure on twin nucleation, propagation and thickening is analysed, and the role of the misfit interfacial dislocations mesh is detailed. In particular, we show that the interface can induce, directly or indirectly via Lomer dislocations, the nucleation of twinning dislocations. A thorough description of the involved mechanisms is given. Through this atomic scale approach, our study offers some useful understanding of the mechanical twinning process in nanolamellar composites, where twinning appears to be a common plasticity mechanism. Graphical abstract: Image 1