| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Improving Strength and Ductility Combination of Laser Powder Bed Fused TRIP-Assisted Steels |
| Author(s) |
Amelia R. How, Sheng Huang, Cemal Cem Tasan |
| On-Site Speaker (Planned) |
Amelia R. How |
| Abstract Scope |
The unique thermal history of the Laser Powder Bed Fusion (LPBF) process typically results in high-strength steel with a primary dendritic microstructure caused by solute partitioning, which can preserve its microstructural signature even after heat treatment. This provides an opportunity for local austenite stability tuning. Additionally, upon aging, a network of evenly distributed reverted austenite forms throughout the microstructure in previously interdendritic regions. We find that these characteristics allow LPBF Transformation-Induced Plasticity (TRIP)-assisted steel to achieve superior ductility compared to conventionally produced microstructures. This is possible by ensuring the right austenite fraction and stability through heat treatment, which activates TRIP at the desired strain level. The mechanism behind this is revealed with the help of in-situ apparatus and synchrotron X-ray diffraction. The broader implications of additively manufactured microstructures in achieving good mechanical performance will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Additive Manufacturing, |