The 9th International Conference on Multiscale Materials Modeling

講演情報

Symposium

E. Deformation and Fracture Mechanism of Materials

[SY-E10] Symposium E-10

2018年11月1日(木) 11:15 〜 12:30 Room2

Chairs: Irene Beyerlein(University of California at Santa Barbara, USA), Dongsheng Xu(Institute of Metal Research, CAS, China)

[SY-E10] Study of atomic trajectories during twinning transformation in magnesium

Andrej Ostapovec1, Tomáš Káňa1, Václav Paidar2 (1.Institute of Physics of Materials ASCR, Czech Republic, 2.Institute of Physics ASCR, Czech Republic)

Deformation twinning is important mode of plastic deformation in magnesium and its alloys. Study of twinning mechanisms has long tradition. However, there is still opened questions in this field. There is some speculations in the literature, which connects possibility of non-Schmid behavior of mechanical twinning to type of atomic trajectories during twinning transformation. However, such theoretical considerations often use simplified descriptions of atomic motions. For instance, some authors made conclusions about macroscopic behaviour of twinning on the basis of linear or circular atomic trajectories. In a broader picture, real atomic paths should be quite complicated. They are consequence of disconnection glide along twin boundary. In this study we would like to discuss atomic trajectories obtained from modeling using EAM potentials as well as from ab-initio calculations.