| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defect and Phase Transformation Pathway Engineering for Desired Microstructures
|
| Presentation Title |
Microstructural Evolution of Nanotwinned Al-Zr Alloy with Significant 9R Phase Stabilization |
| Author(s) |
Nick A. Richter, Yifan Zhang, Ruizhe Su, Tongjun Niu, Qiang Li, Sichuang Xue, Haiyan Wang, Xinghang Zhang |
| On-Site Speaker (Planned) |
Nick A. Richter |
| Abstract Scope |
Aluminum (Al) alloys have a multitude of structural applications, notably in the automotive and aerospace industries. Despite their widespread use, Al alloys suffer from low mechanical strength, significantly lower than most high strength steels. It has been demonstrated that nanotwins can drastically improve the mechanical strength of metals while retaining ductility. However, due to a high stacking fault energy, it remains difficult to form nanotwins in Al. Here, we report on Al-Zr alloy films with an abundance of incoherent twin boundaries and 9R phase. These films also show an extended solid solubility of Zr in Al, retaining a columnar nanograined structure among incoherent twin boundaries, up to 10at% Zr. These nanotwinned Al-Zr alloys exhibit a high hardness (4.5 GPa) and good deformability as shown by micropillar compression tests |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Aluminum, Mechanical Properties |