|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||High Performance Steels
||Post-partitioning Treatment to Improve Strength-ductility Combination in a Quench and Partitioning Steel
||Berk Soykan, Jiyun Kang, Narayan Pottore, Hong Zhu, C. Cem Tasan
|On-Site Speaker (Planned)
The essential role of steel as one of the world’s predominant structural materials can be proven by its broad spectrum of applications in machines, infrastructure, automotive, and defense. Developing lean steels with higher strength and ductility combinations is still an ongoing mission most recently addressed by the quench and partitioning (QP) process. However, one of the inevitable downsides of the QP process is the formation of fresh martensite after final quenching, which limits the ductility of such type of steel. In this work, we demonstrate that a post-partitioning treatment addresses this problem and further improves the damage resistance of QP steels. The underlying microstructural mechanisms contributing to such improvement are examined through a coupling of in-situ SEM/EBSD characterization and in-situ high-energy X-ray diffraction tensile testing. The resulting change in damage nucleation, growth, and coalescence processes are also discussed.
||Iron and Steel, Mechanical Properties, Characterization