Abstract Scope |
The Transformation-Induced Plasticity phenomenon in advanced high-strength steels, involving the conversion of retained austenite to martensite during deformation, has been harnessed to delay plastic instability, leading to an excellent balance between strength and ductility. Nevertheless, the challenge of identifying the optimal combination of multi-component alloying chemistry and processing routes to achieve the desired tensile strength and ductility persists. In this study, we developed machine learning models to predict room temperature tensile properties of low-alloyed TRIP-aided steels. This predictive framework involved data augmentation by incorporating missing information and utilizing the CALPHAD approach, followed by validation against literature values. Furthermore, we elucidated the features that influence mechanical properties and microstructure through model interpretability analyses. To further optimize the strength-ductility trade-off, we applied a multi-objective optimization strategy, intending to expand the Pareto-front systematically. Finally, we derived composition-process combinations that yield tensile-strength balance of about 35,000 MPa%, a range consistent with experimentally reported values. |