About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microstructural Evolution in Two-Phase Stainless Steels During Laser Sheet Metal Forming |
| Author(s) |
Tianchen Wei, Nathan Fripp, Benjamin A. Begley, Victoria M. Miller |
| On-Site Speaker (Planned) |
Tianchen Wei |
| Abstract Scope |
Laser sheet metal forming is an advanced line heating technique used to bend flat sheet metal into various geometries. As the laser beam scans the surface, it rapidly generates a temperature gradient that induces thermal stresses, resulting in plastic deformation. Unlike conventional hot deformation conditions, the temperature and strain rate in laser forming are difficult to control and measure, making microstructural evolution prediction particularly challenging. In this study, three laser parameter combinations with identical line energy were applied, and one intermediate setting was selected to perform up to 200 laser passes on stainless steel sheets. Electron backscattered diffraction (EBSD) analysis reveals that recrystallization initiates after a high number of passes, driven by increased deformation energy and temperature. Additionally, the recrystallized grains continue to deform with further laser passes. The combination with higher power and speed settings results in a larger recrystallized fraction, attributed to increased temperature and strain. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Shaping and Forming, Iron and Steel |