About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
A Thermodynamics-Based Model for Strain-Induced Martensitic Transformations |
| Author(s) |
Brandon D. Snow, D. M. Parks, G. B. Olson |
| On-Site Speaker (Planned) |
Brandon D. Snow |
| Abstract Scope |
Strain-induced martensitic transformations (SIMT) are a key deformation mechanism in many high-performance steel alloys that use metastable austenite to enhance ductility and toughness. Although the mechanisms of SIMT have been well studied, predictive modeling remains an open challenge. The Olson-Cohen (OC) model, introduced in 1975, is the most widely used framework for describing SIMT, employing three parameters — α, β, and n. While these parameters are often treated as empirical fits, the original formulation connects them directly to the thermodynamic driving forces for transformation. In this work we advance the predictive capability of the OC model by linking the OC parameters, and thus SIMT, to thermodynamic data from CALPHAD assessments. We validate the model against literature data for metastable austenitic stainless steels, demonstrating good agreement. The results highlight the potential for a complete integrated computational materials engineering approach to designing new alloys and optimizing thermo-mechanical processing for SIMT-toughened steels. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Modeling and Simulation, Phase Transformations |