| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Designing Complex Microstructures through Additive Manufacturing
|
| Presentation Title |
Pathways to grain boundary engineering in additive manufactured alloys |
| Author(s) |
Marie Charpagne, Yuheng Nie |
| On-Site Speaker (Planned) |
Marie Charpagne |
| Abstract Scope |
Grain boundary engineering (GBE) is a processing strategy that aims to introduce a high fraction of low energy boundaries, such as twin boundaries. GBE-microstructures have been achieved via conventional processing techniques and have shown superior resistance to crack propagation, oxidation, and corrosion. However, the scalability of these processes has remained a major challenge.
Here, I will present new opportunities in GBE unlocked by additive manufacturing (AM). I will introduce novel alloy design strategies that leverage rapid solidification as well as the deep undercoolings inherently associated with additive manufacturing, to introduce twin boundaries in as-built microstructures, in a maximum of two processing steps. We will discuss the metallurgical mechanisms at the origin of twin boundary formation, and how composition and printing parameters affect them, framing a co-design paradigm for GBE in AM. Emphasis will be placed on the scalability of these approaches, and their translatability across multiple alloy families. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Characterization |