Thermal Stability of Ion-Induced Cone-Shaped Relief on the Surface and Microstructure of Ultrafine-Grained Tungsten Obtained by Deformation Nanostructuring

The results of the study of the effect of deformation nanostructuring on the formation of a cone-shaped relief on the surface of ultrafine-grained tungsten with an average grain size of 300 nm under high-fluence irradiation with argon ions with an energy of 30 keV are presented. The thermal stability of the resulting cone-shaped relief on the surface and the ultrafine-grained structure in the volume of tungsten under heating up to 1400°C has been studied. Changes in microhardness have been measured.