| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Study of the Interplay of Basal Slip Activities and Double Twinning Mechanism in Magnesium Using SEM In-situ Tensile Tests Concurrently with HR-EBSD |
| Author(s) |
Nicolo Maria Della Ventura, Xavier Maeder, Szilvia Kalácska, Thomas Edwards, Daniele Casari, Johann Jakob Schwiedrzik, Johann Michler |
| On-Site Speaker (Planned) |
Nicolo Maria Della Ventura |
| Abstract Scope |
An SEM in-situ uniaxial micro-tensile testing set-up was designed to perform HR-EBSD and HR-DIC during deformation. This set-up was used to study extension twinning mechanism in magnesium. Several micron-sized T-bars were prepared in single crystal magnesium by FIB with a loading direction along the c-axis. HR-EBSD cross correlation is used to map local strains, stresses and GNDs distributions at different deformation steps. Special attention was made in lattice distortion during twin nucleation and thickening. DIC was used to measure total strain and to capture progressive slip and twinning activities during the tests. Basal slip activities occur systematically before twinning despite a low Schmid factor. Extension twin nucleates at proximity to the basal slip location. Extension twins systematically involve into double twins with progressive deformation. Twins shapes and distribution are investigated by post-mortem 3D-EBSD. Post-mortem TEM and TKD are also done to investigate the interplay between slip and double twinning activities. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |