Indentation testing on 3 MeV proton irradiated tungsten. (December 2020)

• Record Type: Journal Article
• Authors: Rayaprolu, R.; Möller, S.; Abernethy, R.; Rasinski, M.; Haley, J.C.; Linsmeier, Ch.
• Is Part Of: Nuclear materials and energy. Volume 25(2020)
• Publication Date: 2020-12
• Subjects: Tungsten -- Neutron damage -- Proton damage -- 3 MeV protons -- Instrumented indentation -- TEM -- Nano indentation -- Ion damage; Nuclear energy -- Periodicals; Nuclear fuels -- Periodicals; Nuclear reactors -- Materials -- Periodicals; Radioactive substances -- Periodicals; 621.4833
• DOI: 10.1016/j.nme.2020.100776
• Languages: English
• ISSNs: 2352-1791

Abstract

Highlights: High dose rate proton irradiation (1 × 10 −04 –5 × 10 −5 ). Blisters in tungsten observed and subdued using higher currents. Macro-indentation results compared with nano-indentation results. Transmission electron microscopy conducted post irradiation. Abstract: Tungsten samples have been irradiated with 3 MeV protons with dose rates of 1 × 10 - 04 to 5 × 10 - 05 dpa/s to doses of 0.01–0.67 dpa at 360 K in a pilot experiment. Micro- and macro-indentation were used to measure irradiation hardening in the samples. An initial irradiation hardening of 1.23 ± 0.09 GPa and 1.88 ± 0.83 GPa was measured by micro and macro indentation. The irradiation hardening was observed to saturate at 0.03 dpa damage. Dislocation loops were identified using TEM suggesting an increasing loop size with dose.