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In tungsten plasma-facing fusion reactor components, Ta is the third most abundant element formed by transmutation (after Re and Os), yet little is known about the behaviour of W-Ta alloys under irradiation and any effects Ta might have on Re clustering in W-Re-Ta alloys. In this study, WÀ4.5 at.%Ta, WÀ2 at.% ReÀ1 at.%Ta and WÀ2 at.%Re alloys were exposed to 2 MeV Wþ ions to a fluence of 2.64 Â 10 15 ions cm À2 at temperatures of 573 and 773 K. Atom probe tomography and nanoindentation weredoi:10.1016/j.actamat.2016.10.050 fatcat:qiqaraldoja3lk2re3yptedagi