| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Application of Emerging EBSD Tools for Phase Detection in Martensitic Steels |
| Author(s) |
Patrick Gregory Callahan, David Rowenhorst |
| On-Site Speaker (Planned) |
Patrick Gregory Callahan |
| Abstract Scope |
The microstructures of many steels can be particularly complex, containing multiple phases and features that necessitate observation at the nm scale. Electron backscattered diffraction (EBSD) is a particularly useful technique as it can rapidly identify phase and grain orientation in a single experiment. However, the size of features studied in steels are often near the size of the electron beam interaction volume, causing issues in obtaining quantitative representations of the microstructure. Here we use emerging EBSD tools, namely non-local means pattern averaging reindexing (NLPAR), combined with dictionary indexing methods to obtain consistent measurements of retained austenite (RA) in a 10 wt% Ni steel. The steel undergoes a quench, lamellarization, and temper (QLT) heat treatment for optimal mechanical properties which produces thin film and globular RA features on the order of 10s to 100s of nm in size that lead to inconsistent measurements in RA content using conventional EBSD techniques. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Mechanical Properties |