| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Light Metal Technology
|
| Presentation Title |
Role of Guinier-Preston Zones in Achieving High Strength-ductility in
a New Mg-Zn-Al-Ca-Mn-Ce Sheet Alloy |
| Author(s) |
Jiashi Miao, Fei Xue, Tian Liu, Thomas Avey, Emmanuelle A. Marquis, Alan A. Luo |
| On-Site Speaker (Planned) |
Jiashi Miao |
| Abstract Scope |
ZAXME11100 (Mg-1.0Zn-1.0Al-0.5Ca-0.4Mn-0.2Ce, wt.%) is a new sheet alloy developed to provide room-temperature formability for lightweight applications. The tensile strength of the alloy is significantly improved after 1-hour short aging treatment (T6), while its tensile elongation is slightly reduced from its solution-treated state (T4). Atomic resolution scanning transmission electron microscopy imaging, coupled with atom probe tomography, reveals a high number density of ordered monolayer Guinier-Preston (GP) zones consisting of Al, Ca, and Zn that uniformly form after T6 treatment. The deformation microstructure of T4 and T6 samples tested at different strain levels was examined using electron backscatter diffraction and weak beam dark field STEM imaging. The dominant deformation mechanism in both T4 and T6 samples was dislocation slip. Based on quantitative characterization results, the strengthening contribution of ordered GP zones was estimated. Furthermore, the role of GP zones in achieving high strength-ductility synergy in wrought magnesium alloys will be discussed. |