| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Biomaterials for Biomedical Implants
|
| Presentation Title |
Design of Bio-High Entropy Alloys with Suppressed Elemental Segregation for Laser Powder Bed Fusion Process |
| Author(s) |
Ozkan Gokcekaya, Yong Seong Kim, Takayoshi Nakano |
| On-Site Speaker (Planned) |
Ozkan Gokcekaya |
| Abstract Scope |
High entropy alloys (HEAs) are attracting attention as next-generation biomaterials due to their exceptional mechanical properties and corrosion resistance; however, casting, which is a commonly used method for HEA fabrication, results in severe segregation and lacks shape customizability. This study demonstrates the superior potential of laser power bed fusion (LPBF) in overcoming these issues by enabling simultaneous suppression of segregation through supercooling and promoting crystallographic texture development. Nonetheless, challenges related to the segregation of high melting point elements and the efficiency of the pre-alloying process for powder production still need to be addressed during the LPBF process. To overcome the segregation during the LPBF process, this study developed a new non-equiatomic HEA using thermodynamic calculations and CALPHAD and conducted in-situ alloying using mixed powder to address the limitations associated with pre-alloyed powder in LPBF. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Magnesium, Biomaterials |