| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
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| Symposium
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Characterization of Nuclear Materials and Fuels with Advanced X-ray and Neutron Techniques
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| Presentation Title |
Characterization of Long Range Ordering in Ni-based Alloys with Ex-situ and In-situ Synchrotron X-ray Diffraction |
| Author(s) |
Nicholas Steven Jude Aerne, David Sprouster, Fei Teng, Mehmet Topsakal, Adrien Couet, Kumar Sridharan, Julie D Tucker |
| On-Site Speaker (Planned) |
Nicholas Steven Jude Aerne |
| Abstract Scope |
The formation of long-range order in high-Cr, Ni-based alloys reduces the ductility of the microstructure. This loss of ductility is of concern to the service life of components (i.e. steam generator tubing) in pressurized water reactors. In this research, isothermal aging at temperatures between 330-475 C of model Ni-Cr, and commercial 690, 625, and 625P alloys has been performed up to 10,000 and 21,000 hours, respectively. Additionally, 10 alloys were proton irradiated to 1.5 dpa to enhance the Ni2Cr ordering. The alloys were characterized with ex-situ and in-situ synchrotron x-ray diffraction measurements. Ex-situ measurements were performed to reveal the microstructure evolution and quantification of the Ni2Cr ordering. In-situ experiments with temperatures up to 750 C were carried out to observe the critical transformation temperature. Preliminary results show lattice contraction at 15,000 hours aged at 475C in Alloy 690, indicative of Ni2Cr formation as seen in model alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Nuclear Materials, Environmental Effects |