About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2026
|
| Presentation Title |
Investigating the Influence of Zn and Ca on Twinning-Detwinning Behavior During Fatigue in Mg Alloys |
| Author(s) |
Justin Smith, Aeriel Murphy-Leonard |
| On-Site Speaker (Planned) |
Justin Smith |
| Abstract Scope |
In this study, the twinning-detwinning behavior of Mg-0.5Ca, Mg-2Zn, Mg-2Zn-0.5Ca, and Mg-2Zn-0.75Ca (wt.%) was investigated by combining fully reversed, strain controlled in-Scanning Electron Microscope (SEM) low cycle fatigue loading and Electron Backscatter Diffraction (EBSD). Results showed that in Mg-2Zn, the initial crystallographic texture was such the basal (0001) poles were oriented normal to the loading direction, promoting the formation of extension twins during compressive loading. The strong basal texture was reduced in Mg-0.5Ca, Mg-2Zn-0.5Ca, and Mg-2Zn-0.75Ca. Twinning-detwinning occurred during the first few cycles in each alloy, but residual twins formed with additional loading and complete detwinning ceased. The results suggest the addition of Ca weakens the strong basal texture associated with extruded Mg alloys which reduces the formation of extension twins during compression. The results also showed complete detwinning stopped after the first few cycles and residual twins remained early during cyclic loading. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Characterization, Mechanical Properties |