| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
On the development of high-strength high-damping steels: A CALPHAD assisted alloy design study |
| Author(s) |
Julian Rackwitz, Cemal Cem Tasan, Gregory Olson |
| On-Site Speaker (Planned) |
Julian Rackwitz |
| Abstract Scope |
Self-damping materials provide various benefits for consumer comfort and component lifetimes including noise reduction, dynamic stability, and fatigue. Lately, the Fe-Mn alloy system has gained more attention as a low-cost nonmagnetic alternative to high-damping Ti-Ni and Mn-Cu alloys. Currently, there exists a trade-off between damping capacity and strength in these alloys prohibiting their use in load-bearing applications. To overcome this limitation, we investigate the most promising strengthening mechanism to allow the short-range motion of partial dislocations while impeding the long-range movement of lattice dislocations. Therefore, we present experiments to quantify the interactions between the primary damping source in Fe-Mn alloys and other microstructural features. A high-strength high-damping steel is designed based on CALPHAD modeling, prototyped, and experimentally evaluated. A driving-force-based damping model and a precipitation strengthening model are developed to derive alloy design guidelines to inform the subsequent design approach. Experimental results demonstrate the validity of this approach. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
ICME, Iron and Steel, Phase Transformations |