| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
| Presentation Title |
J-31: Geometric Effects on Microcracking in Superalloys Produced by Laser Powder Bed Fusion |
| Author(s) |
Marcus C. Lam |
| On-Site Speaker (Planned) |
Marcus C. Lam |
| Abstract Scope |
Microcracking has been challenging for superalloys printing by laser powder bed fusion (LPBF) and studied for years. While several underlying causes had been reported, most of the research only experimented on samples with simple shapes far from the complex-shaped components such as turbine blades or heat exchangers. Indeed, cracking is reported from the industry on components with ‘optimized’ processes, even though not observed previously in samples. In this presentation, the influence of the sample geometry on crack susceptibility will be revealed and discussed. Our research indicates that the mid-planes of rectangular samples often used in the literature are only the best-case scenario for microcracking. Therefore, it could be misleading if the results are used to verify the crack-free state of the process or alloys. We investigated the cause of the crack susceptibility difference from the geometric effects by microscopy analyses and process simulation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Characterization |