| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Experimental Investigation of Ni2Cr Long-range Ordering in Ni-Cr-Fe Based Model and Commercial Alloys |
| Author(s) |
Nicholas Steven Jude Aerne, David Sprouster, Julie Tucker |
| On-Site Speaker (Planned) |
Nicholas Steven Jude Aerne |
| Abstract Scope |
Service temperatures in pressurized water reactors may promote nucleation and growth of the long-range order (LRO) Ni2Cr phase in Ni-based alloys. This phase transformation leads to drastic increases in model Ni-Cr alloy’s strength while decreasing the ductility. The formation of Ni2Cr with respect to Ni, Cr, and Fe compositions is disputed in literature. Further the rate of formation and nucleation factors is not well established in and between model and commercial alloys. In this research, isothermal aging of Ni-based commercial alloys: 625, 625 plus, 690, and Ni-Cr-Fe model alloys has been performed to quantify the impact of LRO over time at temperatures 330, 360, 418, and 475 °C, aged up to ~21k, and ~10k hours for commercial and model alloys, respectively. The alloys were characterized by Vickers hardness testing and synchrotron x-ray diffraction. The hardness increased the most for model alloys with no Fe at 475°C. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Mechanical Properties, Nuclear Materials |