Work hardening discrepancy designing to strengthening gradient nanotwinned Cu. (August 2021)

• Record Type: Journal Article
• Authors: Wan, Tao; Cheng, Zhao; Bu, Linfeng; Lu, Lei
• Is Part Of: Scripta materialia. Number 201(2021)
• Publication Date: 2021-08
• Subjects: Gradient nanotwinned Cu -- Work hardening discrepancy -- Extra strengthening -- Strain delocalization -- Elastic-plastic transition; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.113975
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: This study investigates the mechanical behaviors of sandwiched gradient nanotwinned (GNT) Cu designed by only changing the soft component in the central layer with a fixed hard component at its surface. We found that as the work hardening discrepancy of components increases, both the strengthening and work hardening of GNT Cu increase simultaneously, producing a better strength-ductility synergy compared to their freestanding components. The optimized mechanical properties are results of the promoted strain delocalization, prolonged elastic-plastic transition, and larger strain gradient, which induces more geometrically necessary dislocations (GNDs) at the interfaces. Graphical abstract: Image, graphical abstract