| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-40: Extending the Service Life of Stainless Steels- Insights Using SANS and Neutron Total Scattering |
| Author(s) |
Monika Rolinska, Lewis R. Owen, Benjamin E. Jolly, Joakim Odqvist, Peter Hedström |
| On-Site Speaker (Planned) |
Monika Rolinska |
| Abstract Scope |
Embrittlement in certain grades of stainless steels is caused by phase separation of ferrite to iron-rich and chromium-rich regions. The phenomenon occurs when the steel is exposed to temperatures above approximately 300°C, leading to a decrease in impact toughness and corrosion resistance. Suppressing the phase separation through heat treatments is thus of great interest to extend service life. The influence of different heat treatment strategies on phase separation kinetics in DSS2507 has been investigated with small-angle neutron scattering. All proposed heat treatments have altered the phase separation kinetics, leading to a decrease in intensity of the phase separation of up to 60%. To explain this behavior, neutron total scattering measurements have been performed on binary iron-chromium alloys. Using the big box modelling approach through RMCProfile, short-range ordering effects have been found in the binary alloys, which could in part explain the improved behavior of the commercial steel grade. |