title: The nanostructured origin of deformation twinning.
abstract: We have revealed the fundamental embryonic structure of deformation twins using in situ mechanical testing of magnesium single crystals in a transmission electron microscope. This structure consists of an array of twin-related laths on the scale of several nanometers. A computational model demonstrates that this structure should be a generic feature at the incipient stage of deformation twinning when there are correlated nucleation events. Our results shed light on the origin of twinning-induced plasticity and transformation toughening, critical to the development of advanced structural alloys with high strength, ductility, and toughness.
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA.
authors.forename: Qian
authors.initials: Q
authors.lastname: Yu
authors.forename: Liang
authors.initials: L
authors.lastname: Qi
authors.forename: Kai
authors.initials: K
authors.lastname: Chen
authors.forename: Raja K
authors.initials: RK
authors.lastname: Mishra
authors.forename: Ju
authors.initials: J
authors.lastname: Li
authors.forename: Andrew M
authors.initials: AM
authors.lastname: Minor
mesh_terms: D008274:Magnesium / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D056004:Molecular Dynamics Simulation; D009010:Monte Carlo Method; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D008274:Magnesium