| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2024 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-42: Microstructural Evolution in Austenitic Stainless Steels during Laser Sheet-metal Forming |
| Author(s) |
Tianchen Wei, Nathan Fripp, Benjamin Anthony, Benjamin A. Begley, Victoria M. Miller |
| On-Site Speaker (Planned) |
Tianchen Wei |
| Abstract Scope |
Laser sheet-metal forming is a non-contact manufacturing technique— with applications in orbital manufacturing— in which a laser beam induces a steep temperature gradient, causing thermal stresses sufficient for plastic deformation. It is challenging to precisely control and predict the bending behavior because of competing dislocation- and boundary-dependent microstructural processes. In this work, both large- and small-grained specimens of AISI 304 and AISI 330 stainless steels (ΔSFE ~50 mJ/m2) are laser formed using equivalent laser heating cycles. Bending rate analysis shows the features which impede the dislocation mobility reduce the bend angle for a given energy input. The post-forming microstructures are characterized by electron backscattered diffraction (EBSD) and intragranular misorientation analysis (IGMA) reveals distinct microstructural regimes, including evidence of dynamic recrystallization; understanding the dominant processes and evolution of each regime will contribute to improved control of the laser forming process. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Iron and Steel, Shaping and Forming, Characterization |