| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spatially Tailored Materials: Processing-Structure-Properties
|
| Presentation Title |
High strain rate properties and microstructure of Fe-Cu alloys made through laser powder bed fusion |
| Author(s) |
Daniel Rubio-Ejchel, Lauren Poole, Daniel Yin, Frank Zok, Amit Misra, Jerard V Gordon |
| On-Site Speaker (Planned) |
Daniel Rubio-Ejchel |
| Abstract Scope |
Laser-powder bed fusion (L-PBF) additive manufacturing (AM) of pure Fe, FeCu2.5, and FeCu5 wt.% was used to understand the role of Cu on the defect microstructure and the resultant mechanical properties under a range of strain rates between 10^-3–10^3 1/s. Fracture surface analysis, EDS and EBSD microstructure analysis, and TEM analysis was performed on the tested materials. The addition of Cu significantly increased yield strength across all strain rates tested. The observed strengthening was qualified using three models: Hall-Petch strengthening, dislocation strain hardening, and precipitation hardening. Higher Cu concentrations also showed an inverse correlation with strain rate sensitivity and ductility. Fe and FeCu2.5 showed similar ductile failure behaviors across strain rates, whereas FeCu5 possessed higher plasticity at high strain rates due to a low strain rate sensitivity. Overall, this study characterized the strength influence and microstructure of low-alloy Cu precipitates in AM Fe across a range of strain rates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |