Corr, CormacO'Ryan, SeanTanner, ChristopherThompson, MattBradby, JodieDe Temmerman, G.Elliman, RobKluth, PatrickRiley, Daniel2021-08-062021-08-062352-1791http://hdl.handle.net/1885/243238Mechanical properties of Tungsten (W) samples irradiated with 2 MeV Rhenium (Re) ions and helium (He) plasma were investigated using nanoindentation. It was found that there was an increase in hardness for all samples following separate irradiation with both Re ion and He plasma. A slight increase in hardness was obtained for combined exposures. A comparable increase in hardness was observed for a pure He plasma with a sample temperature of 473 K and 1273 K. Optical interferometry was employed to compare surface modification of the samples. Grazing incidence small angle x-ray scattering confirmed He nano-bubble formation of approximately 1 nm diameter in the higher temperature sample, which was not observed with samples at the lower temperaturesPK, CC and JB acknowledge support from the Future Fellowship Scheme of the Australian Research Council (FT120100289, FT100100825 and FT130101355). This research has also been supported by the Science and Industry Endowment Fund grant (PS034).application/pdfen-AU© 2017 The Authors.http://creativecommons.org/licenses/by-nc-nd/4.0/201710.1016/j.nme.2017.04.0122020-11-23CC BY-NC-ND license