| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Electrical Steels
|
| Presentation Title |
Atomic-Scale Mechanisms Behind the Abnormal Growth of Goss Grains in Grain-oriented Electrical Steels |
| Author(s) |
Dierk R. Raabe, Stefan Zaefferer |
| On-Site Speaker (Planned) |
Dierk R. Raabe |
| Abstract Scope |
The physical mechanisms leading to abnormal growth of Goss-oriented grains in grain-oriented electrical steel are still not well understood. We critically revisit existing models on the formation of Goss-oriented grains by abnormal grain growth and provide new insights into the underlying mechanism for Goss texture formation. Specifically we study the role of dislocation-assisted particle dissolution during abnormal growth of Goss-oriented grains. We observe that these grains contain a network of subgrains that evolve with the grain during growth. Structural and compositional analysis of these dislocations by controlled electron channelling contrast imaging (cECCI) and atom probe tomography (APT) show that these dislocations are enriched with Al, N and Mn, which build the composition of the inhibitor particles that assist the abnormal growth. Additionally, molecular statics (MS) calculations are employed to compare the segregation tendencies of Al atoms on dislocations and on Sigma 9 boundaries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Magnetic Materials, Characterization |