Hardness testing is an efficient means of assessing the mechanical properties of materials due to the small sampling volume requirement.Previous studies have established the correlation between flow stress and Vickers hardness.However,the damage layer produced by ion irradiation with low energy is too thin to perform Vickers hardness test,and is usually measured by nano-indentation technique.Therefore,it is necessary to correlate the Vickers hardness and nano-hardness for the convenience of assessing mechanical properties of materials under irradiation.In this study,various materials(pure nickel,nickel base alloys and oxide dispersion strengthened steel)were irradiated with high-energy heavy ions to different damage levels.
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