| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2025
|
| Presentation Title |
Guinier-Preston (GP) zone strengthening of dilute magnesium alloys
comprised of earth-abundant elements |
| Author(s) |
Jishnu Bhattacharyya, Seth Faberman, Aaron Sullivan, Du Cheng, Yuan-Chen Gao, Bi-Cheng Zhou, Zehao Li, Taisuke Sasaki, Sean R. Agnew |
| On-Site Speaker (Planned) |
Jishnu Bhattacharyya |
| Abstract Scope |
Dilute Mg alloys based upon earth abundant Al, Zn, and Ca (along with minor additions of Mn and Zr) exhibit attractive combinations of strength, ductility, and workability via high-speed extrusion. These alloys derive their strength from high number densities of ordered, single atomic layer Guinier-Preston (GP) zones and very thin multi-layer, metastable precipitates. The present study explores the potential of two quaternary Mg-Zn-Ca-Zr (ZXK) alloys produced as sheet materials. In this work, the anisotropic plastic response of the two alloys (ZXK210 and ZXK310) are described using an elastoplastic self-consistent (EVPSC) polycrystal plasticity model. The Mg-Ca-Zn GP zones provide a similar strengthening effect as compared with the Mg-Ca-Al GP zones in AXM alloys. Prismatic slip is more potently strengthened than basal slip because it introduces an antiphase domain boundary as it shears the GP zone. Finally, it is shown that these alloys are immune from natural over-aging. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, ICME |