| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation and Transitions at Grain Boundaries VII
|
| Presentation Title |
Inhibiting Twin Transfer in Magnesium Alloys with Grain Boundary Particles |
| Author(s) |
Benjamin Anthony, Brandon Leu, Wai Tse, Zhenhuan Wang, Irene Beyerlein, Victoria Miller |
| On-Site Speaker (Planned) |
Benjamin Anthony |
| Abstract Scope |
Twinning is a critical deformation mechanism in magnesium alloys due to its ability to accommodate bulk strain at room temperature. However, instances of twin transfer – twin nucleation across grain boundaries due to stresses imposed by the twin tip – can lead to twin chains forming throughout the microstructure, contributing to texture formation and serving as a preferential failure pathway even at relatively low strains. Grain boundary particles were considered for their role in preventing stress field formation in neighboring grains, thereby blocking twin transfer. Compression testing followed by electron backscatter diffraction imaging was used to examine the changes in twinning behavior with varying amounts of grain boundary particles in both rare-earth-containing and rare-earth-free magnesium alloys. Additionally, computational experiments were performed using a Crystal Plasticity Fast Fourier Transform (CP-FFT) model to determine how particle morphology and neighbor grain misorientation influence the ability of a hard particle to prevent twin transfer. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |