About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Real Time Imaging
|
Presentation Title |
In-situ High Temperature Confocal Laser Scanning Microscopy Study during Heat Treatment of Duplex Stainless Steels |
Author(s) |
Wangzhong Mu, Niklas Holländer Pettersson, Sohei Sukenaga, Hiroyuki Shibata, Peter Hedström |
On-Site Speaker (Planned) |
Wangzhong Mu |
Abstract Scope |
It is well known that duplex stainless steels (DSSs) combine excellent mechanical properties and corrosion resistance due to their mixed microstructure of austenite and ferrite. The phase equilibria and kinetics of phase transformations at higher temperatures are important for the microstructure evolution during casting and welding. Therefore, in this work high temperature confocal laser scanning microscope is applied to investigate phase transformations in DSSs during heating and cooling. Five grades from lean to hyper DSS, i.e. 2101, 2304, 2205, 2507, and 3207, are used for the investigations. The effect of cooling rate on the starting temperature of phase transformation is investigated. Thereafter, the microstructure is studied by electron backscatter diffraction (EBSD) and x-ray diffraction (XRD). The results provide further insights in the high-temperature phase transitions in DSS and they support the further work to design new DSS grades with targeted microstructures. |
Proceedings Inclusion? |
Planned: |