About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
D-16: In-Situ High-Energy X-Ray Diffraction Study of Retained Austenite During Quenching & Partitioning Processes in HSLA Steels |
| Author(s) |
Oskar Lof, Peter Hedström, Tao Zhou |
| On-Site Speaker (Planned) |
Oskar Lof |
| Abstract Scope |
Third generation high strength steels are one of the main measures for reduced vehicle weight and improved safety in the automotive industry. Quenching and Partitioning (Q&P) is a suggested process for producing high-strength-low-alloy steels, containing martensite and a substantial amount of retained austenite. This microstructure is the result of partitioning of carbon from supersaturated martensite to untransformed austenite, following the quenching step. Understanding the effects of thermal variables on partitioning of carbon throughout the Q&P process hence becomes very important in getting the desirable microstructure. This was investigated using in-situ high-energy X-ray diffraction during two-stage Q&P processes in a quenching dilatometer. The measurements involved varying heating and cooling rates, holding temperatures and durations, and were carried out on a commercial grade low-alloy steel. By mapping the phase evolution under varying process parameters, it is possible to acquire data that enables more accurate prediction of phase transformation kinetics and microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, Iron and Steel |