About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2026 - In-Situ Characterization Techniques
|
| Presentation Title |
Deformation mechanisms of pure Zn studied by micropillar compression tests at room and elevated temperatures |
| Author(s) |
Biaobiao Yang, Mingdi Yu, Nafiseh Mollaei, Yidi Li, Miguel Monclús, Jingya Wang, Javier Llorca |
| On-Site Speaker (Planned) |
Javier Llorca |
| Abstract Scope |
The deformation mechanisms in pure Zinc (Zn) were studied through compression tests on single crystal micropillars with various crystallographic orientations at both 23°C and 100°C. The critical resolved shear stress (CRSS) of <a> basal and <c + a> pyramidal II slip was measured to be ~10 and ~30 MPa, insensitive to temperature. The <c + a> dislocations were found to transition from pyramidal II plane to basal plane. This transition is highly sensitive to both temperature and loading direction, leading to diverse microstructures under different testing conditions. For example, after compression along c-axis at 23°C, numerous sessile <c + a> dislocations were observed on the basal plane. These dislocations contribute to work hardening and dislocation accumulation beneath the micropillar, ultimately triggering unexpected recrystallization. However, under other testing conditions, the continuous activity of mobile dislocations within the micropillars accommodates the compressive strain, avoiding the dislocation accumulation thus recrystallization beneath the micropillar. |
| Proceedings Inclusion? |
Planned: |