| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
100 Years and Still Cracking: A Griffith Fracture Symposium
|
| Presentation Title |
High-strength and Thermal Stability of Nanotwinned Al Alloys |
| Author(s) |
Qiang Li, Sichuang Xue, Yifan Zhang, Haiyan Wang, Jian Wang, Xinghang Zhang |
| On-Site Speaker (Planned) |
Xinghang Zhang |
| Abstract Scope |
Lightweight Al alloys show widespread applications, but often have inherently low mechanical strength and low service temperature. Age hardened Al alloys have mechanical strength less than ~ 700 MPa and readily experience grain growth at low homologous temperature. We have used far-from-equilibrium approach to fabricate various nanotwinned Al solid solution alloys. Some of the selected Al alloys have flow stresses exceeding 1 GPa, making them one of the strongest Al alloys. Our in situ SEM studies show that the nanotwinned Al alloys possess anisotropy under both tension and compression tests. The solid solution Al alloys have superb thermal stability and mechanical stability at elevated temperatures. These studies shed lights on the design of lightweight high-strength Al alloys for applications in harsh environments. |
| Proceedings Inclusion? |
Planned: |