| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Achieving Exceptional Strength-Ductility Synergy in Cu-Bearing Steels via Nano-Sized Precipitates and Grain-Refinement |
| Author(s) |
He Yang, Ziyong Hou, Ling Zhang, Xiaoxu Huang |
| On-Site Speaker (Planned) |
He Yang |
| Abstract Scope |
Cu, as a pivotal alloying element, plays a crucial role in microstructural and its mechanical properties of Advanced High-Strength Steels (AHSSs). The effect mechanisms of Cu on microstructures evolution is still unclear. In this study, the effect of Cu content on the microstructure and properties of two steels for automobile, which containing 1% Cu and 4%Cu, respectively, was investigated using LOM, SEM, and TEM, along with thermodynamic and kinetic calculations. The results suggested that increasing the Cu content led to an increase in the volume fraction of nano-sized Cu precipitates coupled with the refinement of grain size, which enhanced the tensile strength to 2 GPa and maintained an adequate total elongation of >10%. These findings demonstrate that the microstructure and mechanical properties of the studied steels can be adjusted extensively by varying the amounts of Cu, providing valuable insights for the design of Cu-bearing steels with excellent overall performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Characterization |