| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Agile Additive Manufacturing by Employing Breakthrough Functionalities
|
| Presentation Title |
Microstructural Control of Additively Manufactured Ti-6Al-4V via In-situ Laser Annealing |
| Author(s) |
Connor J. Rietema, John D. Roehling, William L. Smith, Kaila M. Bertsch |
| On-Site Speaker (Planned) |
Connor J. Rietema |
| Abstract Scope |
Laser powder bed fusion (L-PBF) is an additive manufacturing technology that enables the creation of complex customized metallic structures. The extremely rapid cooling rates involved in laser-based printing processes often lead to complex non-equilibrium microstructures that are unfavorable for mechanical properties. This can result in cracked or brittle as-printed parts. Traditionally the problem is solved by heat treating the entire part after the build, however, this process is not targeted and results in bulk microstructural changes that may not be desirable. In this work, we develop a surface annealing technique using large area, multiplexed diode lasers with the goal to control the microstructure of Ti-6Al-4V throughout the printing process. We also give examples showing how in-situ surface annealing can be used to generate layered microstructures and targeted annealing of features. This work was performed under the auspices of the US DOE by LLNL under Contract DE-AC52-07NA27344. LLNL-ABS-837159 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Characterization |