Damage relief of ion-irradiated Inconel alloy 718 via annealing

Fincher, Cole D. and Turman, Haley and French, Aaron and Chancey, Matthew and Gigax, Jonathan and Aydoğan, Eda and Zhao, Dexin and Yadav, Digvijay and Xie, Kelvin and Wang, Yongqiang and Borden, Mike and Shao, Lin and Maloy, S. A. and Pharr, Matt (2020) Damage relief of ion-irradiated Inconel alloy 718 via annealing. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 479 . pp. 157-162. ISSN 0168-583X

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Inconel alloy 718 is a high-strength and corrosion resistant alloy that is commonly used as a beamline vacuum window. The accumulation of irradiation-induced damage substantially decreases the window's service lifetime, and replacing it engenders significant beamline downtime. With this application in mind, herein we examine whether post-irradiation annealing can alleviate irradiation-induced damage of Inconel alloy 718. Inconel alloy 718 was received in a solution annealed state. We then irradiated samples using two different modalities (1.5 MeV H+ and 5 MeV Ni2+) at three representative temperatures for beamline windows (room temperature, 100 °C, and 200 °C), followed by annealing at temperatures viable for in-situ annealing processes (no anneal, 300 °C, and 500 °C). Using nanoindentation, we determined that irradiation-induced hardening occurs but is largely mitigated by post-irradiation annealing. Overall, our results suggest that in-situ annealing of radiation damage in Inconel alloy 718 vacuum windows appears feasible, which could potentially decrease beam downtime and maintenance costs.
Item Type: Article
Divisions: Integrated Manufacturing Technologies Research and Application Center
Depositing User: Eda Aydoğan
Date Deposited: 01 Aug 2023 23:34
Last Modified: 01 Aug 2023 23:34
URI: https://research.sabanciuniv.edu/id/eprint/46770

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