| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
|
| Presentation Title |
Detection and Classification of Cracking via Acoustic Emission in Laser-Melting Experiments |
| Author(s) |
Evan B. Raeker, Kaitlyn M Mullin, Nikhil Tulshibagwale, James Lamb, Tresa M Pollock |
| On-Site Speaker (Planned) |
Evan B. Raeker |
| Abstract Scope |
A custom built 2D laser scanning apparatus was used for performing spot-melts and single-track line scans upon various metal substrates at room temperature, with parameters mimicking those common in laser powder-bed fusion (LPBF) systems. Solidification mode cracking in Ni-base and CoNi-base superalloys along with solid-state mode cracking in BCC refractory metals were investigated via acoustic emission (AE) techniques. The AE data was recorded in reference to the timing of the laser operation, allowing for corresponding thermal simulations to be temporally aligned to the experimental data. The mode of crack formation was able to be classified from the characteristics of their AE events, and solidification cracks were found to form consistently near the end of solidification based on the thermal simulations. The addition of the AE modality to the laser apparatus enables rapid detection and classification of cracking defects in alloys being developed for LPBF. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Solidification |