| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development III -- Super Materials and Extreme Environments
|
| Presentation Title |
A Comparison between In-situ and Ex-situ Mixing of Nanoparticles with a Matrix in Additive Manufacturing of Metal Matrix Composite |
| Author(s) |
Somayeh Pasebani, Milad Ghayoor, Kijoon Lee, Yujuan He, Chih-hung Chang, Brian Paul |
| On-Site Speaker (Planned) |
Somayeh Pasebani |
| Abstract Scope |
Laser powder bed fusion (LPBF) process was utilized to embed nanoparticles of yttrium oxide (Y2O3) into the 304L stainless steel matrix. In first approach, mixture of 304L stainless steel powder and yttrium oxide particles was used as feedstock for fabricating parts using the LPBF process. In second approach, a novel hybrid method has been utilized to synthesize 304L ODS alloy using ink-jetting in the LPBF process. In this method, yttrium oxide nanoparticles selectively doped into the matrix by jetting precursor chemistry before laser conversion and consolidation. Scanning electron microscopy and energy-dispersive X-ray spectroscopy revealed the precipitation of homogenously distributed Y-Si-O nanoparticles in the matrix of additively manufactured 304L ODS alloy in both approaches. The yield stress was 575±8 MPa and 586±9 MPa, respectively, in the first and second approaches, both showing higher mechanical properties compared to 304L and most conventionally manufactured 304L ODS alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Composites |