About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
4th World Congress on High Entropy Alloys (HEA 2026)
|
| Presentation Title |
Deformation Behaviour of GRX-810 at Extreme Temperatures |
| Author(s) |
Subham Chattoraj, Andreas Bezold, Johan Westraadt, Timothy M Smith, Michael J Mills |
| On-Site Speaker (Planned) |
Subham Chattoraj |
| Abstract Scope |
Alloy GRX-810 is a Medium-Entropy ODS alloy that can be additively manufactured (AM) and exhibits exceptional high-temperature creep resistance compared with other AM superalloys. This superior high-temperature performance also extends to tensile behaviour over a temperature range corresponding to ~84–97% of the alloy’s melting temperature (1093–1316°C). Tensile tests demonstrate that GRX-810 retains a yield strength of ~50 MPa and ~4.5% ductility even at 1316 °C (~97% Tₘ). To assess the contribution of ODS strengthening, a non-ODS GRX-810 variant is evaluated under identical conditions and shows markedly inferior tensile properties. A multiscale electron microscopy approach, combining scanning electron microscopy, transmission Kikuchi diffraction, and transmission electron microscopy is employed to elucidate the deformation and strengthening mechanisms governing the simultaneous retention of strength and ductility. Emphasis is placed on the role of yttria dispersoids and carbide second phases in controlling dislocation motion, substructure evolution, and grain boundary stability at extreme temperatures. |
| Proceedings Inclusion? |
Undecided |