| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
A Career in Powder Processing and Additive Manufacturing: A MPMD Symposium Honoring David Bourell
|
| Presentation Title |
Liquid-Induced Healing of Cracks in Nickel-Based Superalloy Fabricated by Laser Powder Bed Fusion |
| Author(s) |
Xiaogang Hu, Qiang Zhu |
| On-Site Speaker (Planned) |
Qiang Zhu |
| Abstract Scope |
The cracking issue during laser powder bed fusion (LPBF) limits the printability of most existing engineering alloys. We report a liquid-induced healing (LIH) post-process that enables complete healing of those microcracks by inducing the intergranular liquid film at the cracking regions. Specifically, we adopted the In738LC alloy prepared by LPBF as the demonstration material to reveal the mechanisms of remelted liquid fraction and isostatic pressure during the crack healing process. The effects of LIH treatment on mechanical properties and microstructural evolution were also discussed. Compared with the hot isostatic pressing that is widely applied currently, our strategy exhibits superiorities in terms of crack healing efficacy, operation complexity, and process cost. LIH shows promise as a routinized and guaranteed process integrated with additive manufacturing, bypassing the technical barriers to completely crack-free printing and thus immediately promoting the industrial application of the alloys hindered by the cracking issue. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Process Technology |