Institute of Physics of Materials AS CR, v. v. i. > Projects > Multiscale analysis of twin-microstructure interactions in HCP metals and alloys

Multiscale analysis of twin-microstructure interactions in HCP metals and alloys

InvestigatorDr. Ing. Filip Šiška, Ph.D.
Number of Project18-07140S
AgencyGrantová agentura České republiky
Duration2018-01-01 - 2020-12-31

Magnesium and titanium based metals and alloys offer, due to their low density, an interesting alternative in lightweight applications. Their mechanical properties are strongly influenced by their hexagonal crystal lattice which provides only limited number of easy slip systems to accommodate plastic deformation. Therefore, deformation twinning is an important mechanism that has a crucial influence on mechanical processing of these materials. Despite its importance, the interactions of twins with microstructure (solute atoms, precipitates) are not fully understood. The topic of this project is the analysis of these interactions in binary and commercial alloys of magnesium and titanium using in-situ experimental methods and multiscale modeling within the framework of continuum mechanics and molecular dynamics. The applied techniques will complement each other in order to clarify an influence of microstructure on twin nucleation and propagation in a material. Obtained results can be useful in the development of future materials.


Máthis K., Knapek M., Šiška F., Harcuba P., Ugi D., Ispánovity P., Groma I., Shin K.: On the dynamics of twinning in magnesium micropillars. Mater. & Design 203 (2021) 109563

Šiška F., Stratil L., Čížek J., Guo T., Barnett M.: Numerical analysis of twin-precipitate interactions in magnesium alloys. Acta Mater. 202 (2021) 80-87

Ostapovec A., K. K., Máthis K., Šiška F.: Interaction of Migrating Twin Boundaries with Obstacles in Magnesium. Metals 11 (2021) 154


Ostapovec A., Serra A.: Review of Non-Classical Features of Deformation Twinning in hcp Metals and Their Description by Disconnection Mechanisms . Metals 10 (2020) 1134-1154


Ostapovec A., Serra A., Pond R.: Non-diffusional growth mechanism of I1 basal stacking-faults inside twins in hcp metals. Scr. Mater. 172 (2019) 149-153

Ostapovec A., Gornakova A.: On faceting of {10 -11} and {10-12} twin boundaries in hcp metals. Mater. Lett. 247 (2019) 99-101


K. K., Ostapovec A.: Variability of Twin Boundary Structure in Computer Simulations of Tensile Twins in Magnesium. Defect Diffus. Forum 385 (2018) 241-244