| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
A Novel Approach to Improve Strength-ductility Combinations in Medium Manganese Steels |
| Author(s) |
Dawn Van Iderstine, Matthew Cagle, YubRaj Paudel, Shiraz Mujahid, Hongjoo Rhee, Haitham El Kadiri |
| On-Site Speaker (Planned) |
Dawn Van Iderstine |
| Abstract Scope |
Stabilizing austenite with manganese is a potential path to new third-generation advanced high-strength steels. Large retained austenite fractions (>30%) have been obtained in intercritically-annealed medium manganese steels. During deformation, this austenite gradually transforms to martensite, prolonging work hardening to give excellent strength-ductility combinations. However, intercritical annealing in its present form has multiple scalability limitations. Resulting mechanical properties are highly sensitive to annealing temperature, and impractical annealing times are often required to sufficiently stabilize austenite. To address such issues, a modified intercritical annealing method is proposed that is expected to promote austenite nucleation with limited growth, enhancing austenite distribution and stabilizing it more efficiently than previously reported for similar compositions. The ductile austenite grains accommodate strain, delaying failure from interactions between the harder matrix ferrite grains. Tensile testing, EBSD, and neutron diffraction are used to study mechanical properties and corresponding austenite transformation behavior, which are compared with literature on similar steels. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Other, Other |