About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Recent Advances in Electron Back-Scattered Diffraction and Related Techniques
|
| Presentation Title |
HREBSD Through Spherical Harmonic Transform Indexing for Characterizing Subgrains |
| Author(s) |
Thomas J. Bennett, Eric M. Taleff |
| On-Site Speaker (Planned) |
Thomas J. Bennett |
| Abstract Scope |
Subgrains produced in metals during deformation under five-power creep at elevated temperatures are distinguished by low-angle boundaries with misorientations as small as a few tenths of a degree. High-resolution electron backscatter diffraction (HREBSD) provides sufficient angular resolution to measure subgrain boundaries and enables characterization of large samples of subgrains not readily accessible using other techniques. We demonstrate that spherical harmonic transform (SHT) indexing can produce HREBSD orientation data sufficient for this purpose and provides distinct advantages over the more common cross-correlation methods. HREBSD data are presented for large populations of subgrains in an interstitial-free steel that was deformed at 850 °C. Changes in the distributions of subgrain size and boundary misorientation with increasing plastic strain, as measured from HREBSD data, provide important insights into microstructure evolution during high-temperature deformation. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Iron and Steel |