| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Use of Large Scale Facilities to Understand the Physical Metallurgy of Fe-based Alloys
|
| Presentation Title |
In situ HEXRD Determination and Numerical Simulation of Internal Stresses during HeatTtreatment of Carburized and Carbonitrided Low-alloyed Steels |
| Author(s) |
Karthikeyan Jeyabalan, Julien Teixeira, Sabine Denis, Guillaume Geandier, Jacky Dulcy, Benoît Denand, Grégory Michel, Simon D Catteau, Marc Courteaux |
| On-Site Speaker (Planned) |
Julien Teixeira |
| Abstract Scope |
Thermochemical treatments like carburizing and carbonitriding allow to improve the combinations of properties in low-alloyed steels, which depend mainly on the distributions of residual stresses and microstructures. This contribution presents a full experimental and simulation analysis of the microstructural evolutions highlighting the influence of nitrogen, and of the internal stresses evolutions during such treatments. High Energy X-Ray Diffraction (HEXRD) is employed to track in situ, during cooling, the internal stresses evolutions and the austenite decomposition kinetics, throughout the carbon and nitrogen-enriched case. A coupled thermal, metallurgical and mechanical model predicting the phase transformation kinetics and the stress evolutions during cooling is assessed on the basis of these in situ experiments combined with post mortem microstructure observations. For carburizing, classical analysis regarding stresses evolutions is confirmed by the in situ characterization. For carbonitriding, unexpected evolutions occur, which are interpreted on the basis of the experiments and the simulation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |