Effects of irradiation temperature and dose rate on the mechanical properties of self-ion implanted Fe and Fe–Cr alloys

By C. Hardie, C. Williams, S. Xua, Steve Roberts. 2013

136 citations recorded by the source corpus.

Abstract Pure Fe and model Fe–Cr alloys containing 5, 10 and 14%Cr were irradiated with Fe+ ions at a maximum energy of 2 MeV to the same dose of 0.6 dpa at temperatures of 300 °C, 400 °C and 500 °C, and at dose rates corresponding to 6 × 10−4 dpa/s and 3 × 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.

Subfields: Biomedical Engineering, Computational Mechanics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/3c80d5d77f1c9842bab5dc1a117e072f5882e723

Citations in the corpus

• Development of next generation tempered and ODS reduced activation ferritic/martensitic steels for fusion energy applications (2017, unknown): “Cr solute enrichment is also commonly observed at dislocation loops and other features following low temperature irradiation [83, 168, 169].”