About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
Temperature-dependent strengthening mechanisms in Mn- and Si-alloyed low carbon ferritic steels for cylindrical battery case |
| Author(s) |
Jungwoong Kim, Hyung-Jun Cho, Sung-Joon Kim |
| On-Site Speaker (Planned) |
Jungwoong Kim |
| Abstract Scope |
This study elucidates the effects of Mn and Si additions on the microstructure and tensile properties of low carbon ferritic steels at room and elevated temperature. Although phase transformations were not observed, the additions led to distinct differences in strain hardening, and dislocation behavior. At room temperature, the Si-added alloy exhibited the highest tensile strength (399 MPa), primarily due to increased dislocation density and enhanced strain hardening. In contrast, at 500 °C, the tensile strength of the Si-added alloy was significantly lower than that of Mn-added alloy as a result of dynamic recovery and extensive subgrain formation. The Mn-added alloy maintained higher strength at elevated temperature by suppressing recovery and preserving dislocation structures. These findings highlight a temperature-dependent influence of the alloy element on strengthening mechanisms, where Si enhances tensile strength at room temperature and Mn contributes to strength also at elevated temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Temperature Materials, Iron and Steel |