Lathing, filing, drilling, slicing, polishing, and RHEA-to-RHEA welding were performed on SPS- and LENS-manufactured test pieces. RHEA combinations with the highest degree of machinability tended to be more ductile, but had a lower yield strength, and vice-versa. Of the selected RHEA combinations, most survived the extensive machining at room temperature (RT), though a few shattered. An analysis of the experimental data provides several insights regarding the continued development and improvement of higher-strength machinable compositions at RT.
NbTaVW RHEA test pieces were manufactured via LENS to test for self-healing, and were subsequently irradiated at the Ion Beam Laboratory. High energy Au ions at 2.8 MeV at a dose of 1x1014 ions/cm2 resulted in 0.9 displacements per atom, while a dose of 1x1015 ions/cm2 resulted in 9 DPA. The average measured nanoindentation hardness of the irradiated RHEA increased 5 to 24%, comparatively less than Inconel 718 and 316 stainless-steel samples.