About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
Printability and Defects in Steels Printed by Laser Powder Bed Fusion |
Author(s) |
Amaranth Karra, Yining He, Sraavya Ranga, Maarten de Boer, Bryan Webler |
On-Site Speaker (Planned) |
Bryan Webler |
Abstract Scope |
This study examines the melt pool geometry and microstructure of low alloy steels produced by laser powder bed fusion (LPBF) additive manufacturing. Single melt tracks over a range of laser power and travel speeds were made on six plates with different low alloy steel compositions. Tracks were also made with and without 4130 steel powder. Melt pool geometry and microstructure were characterized. The experimental results were used to validate heat transfer model-based predictions of melt pool geometry and literature criteria used to rank hot cracking susceptibility. The results show how single-track experiments and models can be used to assess the ability to print a range of low alloy steel compositions with minimal cracking and other defects. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Additive Manufacturing, Phase Transformations |