| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
Additive Manufacturing of Bulk Metallic Glass Composites with Improved Mechanical Properties |
| Author(s) |
Shunyu Liu, Abhijeet Dhiman, Yung C. Shin, Vikas Tomar, Samuel Zhang |
| On-Site Speaker (Planned) |
Yung C. Shin |
| Abstract Scope |
This study demonstrates the in-situ synthesis of ZrCuNiAl bulk metallic glass composites with periodic amorphous-crystalline microstructure for improved ductility via laser additive process. The microstructure evolution mechanism was uncovered through simulating the thermal behavior using a computational model. By controlling the deposition parameters and composition, about 95.3 vol% amorphous phase and more than 50 vol% crystals were produced in fusion zone (FZ) and heat affected zone (HAZ), respectively. Nanoindentation tests were performed to study mechanical properties and deformation behaviors of pure amorphous and crystalline phases with a 700 nm indenter while a 100 µm indenter was utilized to capture the average properties in both zones. The depth-sensing indentation stress-strain data were accurately predicted with an improved iterative numerical algorithm using finite-element modeling, which predicted a yield stress of about 1.55 GPa and 0.52 GPa in FZ and HAZ, respectively and an equivalent indentation strain of more than 13%. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |