| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Applications IV
|
| Presentation Title |
Relating Laser Scanning Effects to Cracking and Grain Structure of High-strength Superalloys |
| Author(s) |
Marcus C. Lam |
| On-Site Speaker (Planned) |
Marcus C. Lam |
| Abstract Scope |
Laser powder bed fusion (LPBF) can produce more efficient high-temperature components for energy-generating devices such as gas turbines, nuclear reactors, and heat exchangers. However, the range of suitable superalloys is still very limited due to their higher crack susceptibility and inferior microstructure produced in the LPBF process. Laser scanning as one of the main influencing will be discussed in this talk. The effects of laser parameters and scanning vector arrangement on several gamma-prime-strengthened superalloys will first be presented, followed by microscopy and process modeling analyses to explain the solidification conditions related to high angle grain boundary (HAGB) cracking in superalloys. The results suggest that a balanced consideration between cracking, productivity and deformation is required. This work can contribute to a better understanding of LPBF process relating to cracking, facilitating the broader application of superalloys in additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Solidification |