| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Use of Large Scale Facilities to Understand the Physical Metallurgy of Fe-based Alloys
|
| Presentation Title |
In situ Quantitative Study of Retained Austenite Mechanical Stability in 3rd Generation TRIP-aided Steels by High-Energy X-ray Diffraction on Synchrotron Beamline |
| Author(s) |
Mathias Lamari, Sebastien Allain, Guillaume Geandier, Julien Teixeira, Astrid Perlade, Kangying Zhu |
| On-Site Speaker (Planned) |
Mathias Lamari |
| Abstract Scope |
The evolution of austenite stability in medium manganese steels during manufacturing and further mechanical loading has been investigated by in situ High Energy X-Ray Diffraction. The presented experiments have been realized on Petra-III P07 line at Desy (Hamburg). The high energy (100 keV) coupled with a high-performance detector (Perkin-Elmer) enable high acquisition rates and thus in situ time-resolved investigations.
Two microstructures with different morphology (globular and fibrous) produced by intercritical annealing exploiting the Austenite Reversed Transformation (ART) mechanism have been studied and their formation explained by analyzing the solute partitioning between austenite and ferrite during the thermal treatment.
Tensile tests have been then conducted on the two steels at different rates to quantify the mechanically induced martensitic transformations and determine the local stresses in the constituting phases of the steels. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |