About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials, Processes and Applications for Energy Industry
|
| Presentation Title |
The Role of Melt Pool Dimensions on Solidification Cracking in Gamma Prime Strengthened Ni Based Superalloys Processed with Laser Powder Bed Fusion |
| Author(s) |
Joshua Rouault, Dan McConville, Mary Dunbar, Ben Rafferty, Jeremy Iten, Jonah Klemm-Toole |
| On-Site Speaker (Planned) |
Joshua Rouault |
| Abstract Scope |
Laser powder bed fusion (LPBF) can enable more complex component designs that can increase performance in power generation applications. However, many gamma prime strengthened Ni base alloys are susceptible to solidification cracking due to unfavorable terminal solidification reactions and the generation of tensile residual stress during LPBF. In this work, variations in melt pool size, shape, and overlap were evaluated to determine their influence on solidification cracking in IN738 and CM247. It was found that larger, longer, and more overlapped melt pools result in less solidification cracking. The stress for the onset of solidification cracking was evaluated in both alloys with the SigmaJig weldability test, and cantilever specimens were made with LPBF to evaluate influences of melt pool dimensions on residual stress. The results of this work can be used as a guide to design processing parameters to minimize cracking in high temperature Ni-based alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |