Effects of Irradiation Temperature and Dose Rate on the Mechanical Properties of Self-Ion Implanted Fe and Fe-Cr Alloys
Autor: | Hardie, Christopher D, Williams, Ceri A, Xua, Shuo, Roberts, Steve G |
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Rok vydání: | 2013 |
Předmět: | |
Zdroj: | Journal of Nuclear Materials, Vol.439, Issues 1-3, August 2013, p.33-40 |
Druh dokumentu: | Working Paper |
DOI: | 10.1016/j.jnucmat.2013.03.052 |
Popis: | Pure Fe and model Fe-Cr alloys containing 5, 10 and 14%Cr were irradiated with Fe+ ions at a maximum energy of 2MeV to the same dose of 0.6dpa at temperatures of 300 C, 400 C and 500 C, and at dose rates corresponding to 6 x 10-4 dpa/s and 3 x 10-5 dpa/s. All materials exhibited an increase in hardness after irradiation at 300 C. After irradiation at 400 C, hardening was observed only in Fe-Cr alloys, and not in the pure Fe. After irradiation at 500 C, no hardening was observed in any of the materials tested. For irradiations at both 300 C and 400 C, greater hardening was found in the Fe-Cr alloys irradiated at the lower dose rate. Transmission electron microscopy and atom probe tomography of Fe 5%Cr identified larger dislocation loop densities and sizes in the alloy irradiated with the high dose rate and Cr precipitation in the alloy irradiated with the low dose rate. Comment: 42 pages, 6 figures |
Databáze: | arXiv |
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