| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Solute Partitioning during the Double Soaking Heat Treatment of Medium Manganese Steels |
| Author(s) |
Alexandra Glover, Emmanuel De Moor, John Speer |
| On-Site Speaker (Planned) |
Alexandra Glover |
| Abstract Scope |
Double soaking is a novel two-step heat treatment for medium manganese steels which produces microstructures of martensite and austenite. First, the primary intercritical annealing treatment is applied resulting in primary austenite nucleation and growth, with solute partitioning into austenite. Next, the secondary soaking treatment is applied at an (intercritical) annealing temperature, replacing some fraction of the remaining ferrite with austenite, termed secondary austenite. Upon quenching, secondary austenite is expected to transform to martensite, while significant fractions of primary austenite are retained. During the secondary soaking treatment redistribution of carbon, and potentially manganese, between microstructural constituents is expected. This work will present experimental results concerning austenite growth during the secondary soaking treatment, along with corresponding changes in solute concentration profiles. Microstructural evolution during the secondary soaking treatment is characterized using a combination of transmission Kikuchi diffraction (TKD), scanning transmission electron microscopy (STEM) energy dispersive X ray spectroscopy (EDS), and DICTRA simulations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Phase Transformations, Characterization |