| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nano and Micro Additive Manufacturing
|
| Presentation Title |
Microstructure Control of Additively Manufacturing Metal Alloys through Microscale Laser Beam Engineering |
| Author(s) |
Manyalibo Matthews |
| On-Site Speaker (Planned) |
Manyalibo Matthews |
| Abstract Scope |
Laser powder bed fusion (LPBF) has proven to be an effective additive manufacturing technology for the manufacture of complex metal components. However, the local thermal history driven by focused laser beam scanning can often lead to undesirable solidified phase composition and non-uniform microstructures. At the same time, the ability to locally modify the laser amplitude, phase and polarization as a function of time during a build opens new possibilities for tailoring microstructures for functional grading and improved macroscale performance. In this talk I will review experimental and simulation efforts to study the effect of modified laser beam profiles on the resulting microstructure of LPBF materials. Structured, localized laser beam profiles as well as distributed diode-based illumination profiles are shown to strongly affect solidification microstructures in steel 316L and Ti-6Al-4V alloys and allow us to probe the laser-melt pool interactions that drive the solidification behavior. Prepared by LLNL under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Process Technology, Computational Materials Science & Engineering |