About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
|
12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
|
Presentation Title |
Role of Zn on the Yielding Behavior in Mg-Al-Ca Based Dilute Alloys |
Author(s) |
Zehao Li, Taisuke Sasaki, Si Gao, Nobuhiro Tsuji, Kazuhiro Hono |
On-Site Speaker (Planned) |
Zehao Li |
Abstract Scope |
The low-cost Mg-Al-Ca based alloys have attracted considerable attention due to the potential for fulfilling the good formability and high strength concurrently. In this work, we investigate a yield point phenomenon caused by the Zn addition in a fully annealed Mg-1.2Al-0.5Ca-0.4Mn sheet alloy. The Lüders band deformation following yielding is clearly presented with the aid of digital image correlation during tensile tests. Meanwhile, this phenomenon becomes more prominent as the strain rate decreases. It is clarified that the initial yield drop is due to the enhanced dislocation locking and suppression of cross-slip by the Zn addition as revealed from (S)TEM and 3D atom probe analysis. The subsequent Lüders-type deformation is promoted by the dislocation multiplication and twinning transfer. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |