About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
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12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
|
Presentation Title |
Achieving Exceptionally High Strength in Mg-Al-based Magnesium Extrusions |
Author(s) |
Zhuoran Zeng, Jian-Feng Nie, Nick Birbilis |
On-Site Speaker (Planned) |
Zhuoran Zeng |
Abstract Scope |
Exceptionally high strength Mg-Al-Zn and Mg-Al-Ca-based alloys are demonstrated herein, revealing a yield strength of more than 380 MPa. In this study, AZ31 and Mg-Al-Ca-based alloys was extruded at different temperatures to reveal an exceptionally high strength with ultrafine grains. To reveal the origin of high strength in the developed alloy, the microstructure of Mg-Al-base alloys was compared with those of Mg-1Zn alloy and pure Mg with similar grain size and textures. The solute atoms were identified to be the key to alloy strengthening (∼210 MPa). In contrast to grain boundary sliding and grain rotation that is observed submicron-grained pure Mg; the solute in submicron-grained Mg-Al-based alloys suppressed such intergranular deformation modes, with the grain boundaries in submicron-grained AZ31 providing significant strengthening (via the Hall-Petch relationship). The results herein reveal high strength Mg-alloys are readily achievable, the related concepts of which have implications for numerous Mg alloy systems. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |