Proton Irradiation Damage in Cold Worked Nb-Stabilized 20Cr-25Ni Stainless Steel

A.F. Alshater, Dirk Engelberg, C.J. Donohoe, Stuart Lyon, A H Sherry

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    Micro-scale damage with a topographical contrast has been observed in cold-worked Nb-stabilised 20%Cr-25%Ni stainless steel, following irradiation with 2.2 MeV protons at 400oC and a dose rate of ~ 10-5 dpa/s. After an irradiation dose of 3 and 5 dpa, microstructural changes were found to a depth of 22 μm below the irradiated surface, coincident with the estimated mean range of protons in the material as predicted by the TRIM code. Large variations of intragranular mis-orientations, in combination with a depletion of chromium at grain boundaries, were observed in the proton-irradiated layer. This was accompanied by an increase in nano-hardness, which was linked to a partial transformation of tangled dislocation networks into dislocation loops. Such visible microstructural changes have not been reported before in the absence of post-irradiation annealing treatments.
    Original languageEnglish
    Pages (from-to)130-137
    Number of pages8
    JournalApplied Surface Science
    Early online date18 May 2018
    Publication statusPublished - 1 Oct 2018


    • Radiation Damage
    • Proton Irradiation
    • Nuclear Fuel Cladding
    • Dislocations
    • Mis-orientation


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    • MPC: Materials Performance Centre

      Burke, G., Engelberg, D., Preuss, M., Frankel, P., Jimenez-Melero, E., Pickering, E., Scenini, F., Stevens, N., Race, C., Connolly, B., Abdallah, M., Armson, S., Attar, H., Barron, P., Bird, J., Brown, A., Bruce, K., Buxton, O., Cassineri, S., Cattivelli, A., Chen, W., Collins, J., Debenham, L., Eaton-Mckay, J., Eguchi, K., Foster, D., Fox, C., Garrett, A., Gredis, A., Grime, T., Hou, J., Howe, B., Hughes, J., Hunt, C., Islam, U., Jalil, R., Jones, C., Kablan, A., Kapousidou, M., Koc, O., Kroll, R., Lang, R., Lennard, J., Liubercev, S., Mahmood, S., Maric, M., Martin, C., Mazzei, G., Rigby-Bell, M., Rogers, M., Sanchez, C., Shah, Z., Stavroulakis, E., Stuglik, P., Suleman, T., Supornpaibul, N., Thornley, S., Volpe, L., Wang, H., Wilson, M., Wilson, A., Woodward, T., Wylie, A., Xu, X. D., Yankova, M., Yildirim, E., Zhou, Y., Zhu, S., Barzdajn, B., Carruthers, A., Cassineri, S., Chang, L., Obasi, G., Palko, S., Reccagni, P., Tang, R., Thomas, R., Unnikrishnan, R., Zhang, Z., Zhou, Y. & Aspinall, A.

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      Project: Research

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