About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Real Time Imaging
|
Presentation Title |
In-situ Real Time Observation of Austenite Formation in Duplex Stainless Steels during Different Cooling Conditions |
Author(s) |
Wangzhong Mu, Oscar Rova, Sohei Sukenaga, Hiroyuki Shibata |
On-Site Speaker (Planned) |
Wangzhong Mu |
Abstract Scope |
Austenite formation during cooling is an important issue for the microstructure control of duplex stainless steels (DSSs). The balance of austenite and ferrite fraction controls this material mechanical and corrosive resistance properties. In this work, the austenite formation from a comprehensive grade DSSs (2101, 2205, 2304, 2507 and 3207) has been observed in-situ by confocal laser scanning microscope (CLSM). Different cooling conditions were investigated on the austenite starting temperature and its fraction. The fraction is furthermore characterized by electron backscatter diffraction to identify the CLSM analysis results. The features of austenite nucleation and growth intergranular as well as intragranular are categorized to discuss, and the finding is supported by the theoretical calculation using classical nucleation theory. The final microstructure is compared with the real DSS as-cast and weldment specimens, in order to apply the obtained understanding to different engineering applications like casting, welding and potentially additive manufacturing. |
Proceedings Inclusion? |
Planned: |