| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Late News Poster Session
|
| Presentation Title |
L-60: An Evaluation of Advanced EBSD Methods for Phase Detection in Martensitic Steels |
| Author(s) |
Patrick Gregory Callahan, David J Rowenhorst, Richard W Fonda |
| On-Site Speaker (Planned) |
Patrick Gregory Callahan |
| Abstract Scope |
Electron backscattered diffraction (EBSD) mapping has become a powerful tool for the evaluation of alloy microstructures due to its ability to clearly differentiate between phases and crystallographic orientations, thereby providing clear descriptors of grain size and morphologies. However, due to the high amount of plastic strain present in some alloys, such as martensitic steels, the EBSD signal can be weak and difficult get reliable indexing. Because even small amounts of retained austenite can strongly influence the properties of a steel, this study evaluates the ability of two different pattern processing and indexing methods, Dictionary Indexing and Non-Local means Pattern Reindexing (NLPAR), to improve the indexing success in a martensitic steel with a minority of retained austenite. We will show that both methods improve the indexing success rate by an order of magnitude, and can accurately differentiate between the BCC-indexed martensite and the FCC austenite. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Characterization, Iron and Steel, Computational Materials Science & Engineering |