| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
|
| Presentation Title |
Controlling the Structure and Mechanical Properties of a Zr-based Bulk Metallic Glass via Laser Powder Bed Fusion |
| Author(s) |
Jamie J. Kruzic, Bosong Li, Vladislav Yakubov, Keita Nomoto, Simon P. Ringer, Bernd Gludovatz, Xiaopeng Li |
| On-Site Speaker (Planned) |
Jamie J. Kruzic |
| Abstract Scope |
Laser powder bed fusion (LPBF) enables the fabrication of large-dimensioned bulk metallic glasses (BMGs); however, we don’t yet understand how to control the process to obtain specific mechanical properties. LPBF was used to produce dense and fully amorphous Zr59.3Cu28.8Nb1.5Al10.4 BMG samples from two different starting powders. Fully amorphous samples were achieved within a large window of laser powers and scanning speeds. Strength and hardness generally increased with increasing energy density while the relaxation enthalpy, ductility, and fracture toughness decreased. When the LPBF energy density was raised above ~30-33 J/mm3, high relative density was maintained along with devitrification and embrittlement. Low energy densities below ~20 J/mm3 had low relative density <99%. The coarser powder had much lower oxygen content and gave better glass forming ability, compression ductility, and fracture toughness up to ~38 MPa√m. It is thus possible to tailor the structure and properties of BMGs by tuning the LPBF process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Additive Manufacturing, Other |