| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Effect of Cold Rolling on PhaseTtransformations in 2202 Lean Duplex Stainless Steel |
| Author(s) |
Frederic Danoix, Sophie Cazottes, Raphaele Danoix, Dimitri Rolland, Sarata Cissé, Véronique Massardier |
| On-Site Speaker (Planned) |
Frederic Danoix |
| Abstract Scope |
The effect of plastic deformation on thermal ageing of a lean 2202 duplex stainless steel at intermediate temperatures (280-450°C) was studied by a combination of atom probe tomography and thermoelectric power. In non-deformed condition, spinodal decomposition of ferrite is shown to be the main ageing process, with an activation energy of 206kJ/mol. With plastic deformation, ageing proceeds faster, while austenite partly transforms to martensite. If residual austenite remains unaffected, both ferrite and martensite decompose. The spinal decomposition kinetics of ferrite is shown to increase with the deformation rate. Martensite also decomposes at 450°C, with precipitation of various phases, including chromium nitrides, G-phase and copper rich particles. The Fe-Cr rich martensite is also shown to decompose, but through a nucleation and growth mechanism, due to a decrease of Cr content in the matrix. |
| Proceedings Inclusion? |
Planned: |