About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
4th World Congress on Artificial Intelligence in Materials & Manufacturing (AIM 2026)
|
| Presentation Title |
AI-Driven Alloy Design Framework for Cost-Effective Ultrahigh Strength Martensitic Steels |
| Author(s) |
Yoonjung Won, Chang Dong Yim, Jae-Bok Seol, Ki-Sub Cho |
| On-Site Speaker (Planned) |
Yoonjung Won |
| Abstract Scope |
High Co-Ni secondary hardening martensitic steels exhibit exceptional strength-toughness performance, but their use is limited by the high cost of Co and Ni. To address this, we developed an AI-driven alloy design framework that guides compositional optimization under performance-cost trade-offs. A machine learning ensemble model was trained to predict ultimate tensile strength and integrated with a genetic algorithm for inverse design to efficiently explore high-dimensional compositional space. Unsupervised learning was then applied to screen candidate alloys under fabrication feasibility and cost constraints. Three optimized alloys (7CoV, 9CoV, 12CoV) with substantially reduced Co and Ni contents were fabricated and evaluated. Microstructural characterization revealed cooperative precipitation of M2C and MC carbides, where reduced Co content suppressed M2C formation and enabled complementary MC precipitation, enhancing secondary hardening. The 12CoV achieved a tensile strength of 2.7 GPa with excellent toughness. This study demonstrates that AI-driven compositional design enables cost-effective ultrahigh strength martensitic steel development. |
| Proceedings Inclusion? |
Undecided |