| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Chemical Heterogeneity and Quench Rate Considerations for Quench and Partition Processing |
| Author(s) |
Douglas S. Smith, Kester Clarke, Amy Jean Clarke |
| On-Site Speaker (Planned) |
Douglas S. Smith |
| Abstract Scope |
Design of quench and partition (Q&P) treatments often assumes chemical homogeneity after the annealing step and quench rates rapid enough to suppress non-martensitic transformations. While these assumptions simplify calculations, the presence of chemical banding and polygonal ferrite suggests that prior microstructure and cooling rate influence Q&P outcomes. Optimum quench temperatures were determined with consideration of chemical banding in the prior microstructure and solute redistribution after different annealing treatments, while the effect of quench rate to these temperatures was investigated through dilatometry and advanced characterization following Q&P. Combined, these investigations suggest differences in local austenite content and chemical stability as a function of prior microstructure and annealing conditions, while also highlighting the effects of polygonal ferrite formation on C partitioning during the quench. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Phase Transformations |