The 9th International Conference on Multiscale Materials Modeling

Presentation information

Symposium

F. From Microstructure to Properties: Mechanisms, Microstructure, Manufacturing

[SY-F12] Symposium F-12

Thu. Nov 1, 2018 4:00 PM - 5:30 PM Room3

Chair: Yasushi Shibuta(The University of Tokyo, Japan)

[SY-F12] Various interfaces related to twinning in hexagonal metals

Vaclav Paidar1, Andriy Ostapovets2 (1.Institute of Physics AS CR Prague, Czech Republic, 2.Institute of Physics of Materials AS CR Brno, Czech Republic)

The {10-12} twin mode is the one most commonly activated in hexagonal metals. A primary part of the lattice transition from the matrix to the twin orientation is shear deformation that converts the [0001] direction of the hexagonal axis in the matrix to a direction almost parallel to the [10-10] direction perpendicular to the <a> axis in the basal plane in the twin. In addition to primary mechanical twinning also several types of double-twins were observed as, for example, {10-11}-{10-12} or {10-12}-{10-12}. Surprisingly, the last one can occur in magnesium with the c/a ratio smaller than √3 but also in zinc with the c/a ratio larger than √3. Various types of symmetrical and asymmetrical interfaces including also basal/basal or prismatic/prismatic boundaries will be discussed and their impact on materials properties will be envisaged.