Characteristic boundaries associated with three-dimensional twins in hexagonal metals
Shujuan Wang, Mingyu Gong, Rodney J. McCabe, Laurent Capolungo, Jian Wang, C.N. Tomé
Abstract
twins in magnesium using high-resolution transmission electron microscopy (HRTEM). Eight characteristic facets associated with twin boundaries are reported, five of which have never been experimentally observed before. Further, molecular dynamics simulations suggest that the formation and motion of these facets is associated with the accumulation of twinning dislocations. This work provides insights into understanding the structural character of 3D twins and serves to develop strategies for modulating twin kinetics by modifying twin boundaries, such as solute segregation.
Topics & Concepts
Crystal twinningMaterials scienceHigh-resolution transmission electron microscopyAtomic unitsTransmission electron microscopyMolecular dynamicsChemical physicsCrystallographyDislocationCondensed matter physicsNanotechnologyChemistryMicrostructurePhysicsMetallurgyComputational chemistryQuantum mechanicsMagnesium Alloys: Properties and ApplicationsMicrostructure and mechanical propertiesHydrogen Storage and Materials