| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
In-Situ Measurements and Modelling of Thermal Stress Evolution in Additively Manufactured Bulk Metallic Glasses |
| Author(s) |
Samuel Gibbon, Marco Simonelli, Simon Sankare, Adam Clare, Alper Evirgen, James Rouse, Christopher Tuck |
| On-Site Speaker (Planned) |
Samuel Gibbon |
| Abstract Scope |
Laser powder bed fusion of iron-based bulk metallic glasses (BMGs) is a promising technique due to intrinsically high local cooling rates necessary for amorphous microstructures. However, processing such BMGs is difficult due to the highly brittle nature of the material leading to significant cold cracking because of induced thermal stresses. A novel in-situ experiment is presented, comprising a micro-tensile tester applying a constant force to a gauge which is irradiated with a fibre laser to mimic typical additive manufacturing scan strategies. The experimental set-up acquires force and extension data in the kHz range. It is coupled to high-speed thermal imaging to track the high cooling rates each thermal cycle and high fidelity CFD modelling to investigate the evolution of residual stresses in solid specimens and their influence on crack formation. Based on the results, BMG samples are printed with optimal scanning strategies and characterised metallurgically and magnetically. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Magnetic Materials |