About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
Presentation Title |
A-35: Ultrafine Austenite in Laser Powder Bed Fusion Processed Duplex Stainless Steels Through Microstructural Engineering |
Author(s) |
Xinyi Cindy He, Xiaozhou Liao, Simon Ringer, Sophie Primig, Nima Haghdadi |
On-Site Speaker (Planned) |
Xinyi Cindy He |
Abstract Scope |
The highly non-equilibrium microstructures resulted from metal additive manufacturing (AM) can offer unique opportunities for microstructural engineering. One example is duplex stainless steel that first solidifies as delta-ferrite at high temperature. In these steels, the further solid-state phase transformation during AM and post-processing can be engineered to obtain desirable properties through the formation of ultrafine austenite. Mechanical and corrosion properties of these steels are dependent on the phase ratio, size and chemistry of austenite and ferrite, precipitates, and dislocation density. The current research aims to unravel the relationship between AM process parameters and character of austenite in duplex stainless steels fabricated by laser powder bed fusion. A detailed insight into the capability of microstructural manipulation in these steels can not only contribute to tailoring the properties of these steels but also be extended to other similar allotropic alloys processed by AM. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Phase Transformations, Mechanical Properties |