| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation and Transitions at Grain Boundaries VII
|
| Presentation Title |
Relationship Between Microstructure and Mechanical Properties of Super Duplex Stainless Steel |
| Author(s) |
Mohammed Ali Lakhdari, Hugo Van-landeghem, Florent Krajcarz, Guilhem Martin, Laurent Delanny, Jean-Denis Mithieux, Muriel Veron |
| On-Site Speaker (Planned) |
Mohammed Ali Lakhdari |
| Abstract Scope |
The high mechanical strength of UNS S32750-type superduplex stainless steel is controlled by the characteristics of its fine-grained dual-phase austenite-ferrite microstructure, obtained through dedicated thermomechanical treatments. In order to achieve even higher strength, it appears necessary to identify the microstructural parameters, e.g. phases and grain morphology, crystallographic texture and phase fractions, governing the elasto-plastic behavior. To this end, model microstructures were generated to isolate the effect of those parameters from each other. Interrupted tensile tests followed by microscopic characterization (EBSD mapping and TEM observation) were carried out to relate the mechanical behavior to the evolution of texture and dislocations for the different materials. SEM in-situ tensile tests were conducted to determine the local strain distribution within the phases.
These results were used to validate and optimize a crystal plasticity finite element model that describes the mechanical response of the material as a function of crystallographic texture. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |