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1 results on '"irradiation embrittlement"'

1. The mechanistic implications of the high temperature, long time thermal stability of nanoscale Mn-Ni-Si precipitates in irradiated reactor pressure vessel steels.

Author

Almirall, N., Wells, P.B., Pal, S., Edmondson, P.D., Yamamoto, T., Murakami, K., and Odette, G.R.

Subjects
*PRESSURE vessels, *ATOM-probe tomography, *THERMAL stability, *ENERGY dispersive X-ray spectroscopy, *HIGH temperatures, *STEEL walls, *SILICON solar cells
Abstract

Post irradiation annealing (PIA) clarified the induced versus enhanced controversy regarding nanoscale Mn-Ni-Si precipitate (MNSP) formation in pressure vessel steels. Radiation induced MNSPs would dissolve under high temperature PIA, while radiation enhanced precipitates would be stable above a critical radius (r c). A Cu-free, high Ni steel was irradiated with 2.8MeV Fe2+ ions at two temperatures to generate MNSPs with average radii (r ¯) above and below an estimated r c for PIA at 425°C up to 52 weeks. Atom probe tomography and energy dispersive x-ray spectroscopy showed MNSPs with r < r c dissolved, while those with r > r c slightly coarsened, consistent with thermodynamic predictions. Image, graphical abstract [ABSTRACT FROM AUTHOR]

Published
2020
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