ČAPEK Jan Univerzita Karlova v Praze

Spoluautoři MÁTHIS Kristián, BERAN Přemysl, LUKÁŠ Petr, VRÁTNÁ Jitka

Twinning activity in cast polycrystalline magnesium at room temperature was investigated by in-situ neutron diffraction and acoustic emission techniques. The combination of these two techniques results in obtaining complementary information about the twinning nucleation and growth during the straining. It is shown that twinning evolution differs during compression and tension. There are a large number of small twins in tension and less, large twins in compression. Evolution of the lattice strains on particular planes indicates that twin growth during compression is easier than during tension owing to lattice symmetry reasons. The experimental results correspond with that of Elasto-Plastic Self-Consistent modeling.