| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Designing Complex Microstructures through Additive Manufacturing
|
| Presentation Title |
Laser powder bed fusion of CuCrZr - In625 multi-materials |
| Author(s) |
Andaç Özsoy, Steve Gaudez, Antonios Baganis, William Hearn , Zoltán Hegedüs, Yunhui Chen, Alexander Rack, Steven Van Petegem |
| On-Site Speaker (Planned) |
Steven Van Petegem |
| Abstract Scope |
Laser powder bed fusion of CuCrZr - In625 multi-materials is an interesting, yet challenging problem, in particular because of cracking. Through operando X-ray diffraction and thermodynamics simulations, we show that minor alloying elements in In625 cause an immiscibility gap with CuCrZr in both liquid and solid state. Liquid phase separation then leads to solidification of two phases with vastly different freezing ranges, where the mushy zone of Ni-rich primary phase and Cu-rich liquid survives over a long temperature range, causing solidification cracking. Scheil solidification calculations suggest the highest cracking susceptibility for mixtures with 20-40 wt. % CuCrZr. This was verified by crack density measurements obtained from printing powder blends of CuCrZr and In625. Furthermore, it is shown by operando X-ray imaging and SEM/EDS characterization that solidification cracking takes place in the last stages of solidification, where the mushy zone separates into cracks that initiate from islands of Cu-rich liquid. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Solidification |