Abstract
Except the excellent oxidation and corrosion resistance at elevated temperatures, the high temperature microstructure stability of high Si austenitic stainless steels is also of attention. In this work, the microstructure and the corresponding mechanical properties evolutions of a high Si austenitic stainless steel during long-term aging at 510 °C were investigated. The results showed that Si has promoted the formation of a multi-phase, composed by G phase and ferrite. It is revealed that G phase precipitates at grain boundaries prior to ferrite and it is because G phase formation has changed the composition in the surrounding austenite that ferrite was induced. Such ferrite is proved to be responsible for the dramatically decreased impact toughness during aging, since the impact toughness could be rejuvenated by only reducing the ferrite content through high temperature annealing.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.