Effect of Irradiation on Grain Size and Texture in Mo and Ta Films

Implantation of heavy ions into metal matrices leads to the creation of a high concentration of radiation defects. X-ray diffraction studies of Mo and Ta foils implanted with ⁵⁷Fe ions have been carried out. It is shown that the implantation of Fe ions does not significantly affect the lattice parameters. It has been established that irradiation leads to the broadening of diffraction lines and a decrease in the size of crystal grains. The Mo and Ta foils are found to be highly textured, with {100} orientation in the foil plane. Irradiation with Fe ions has no noticeable effect on the texture. However, subsequent annealing at a temperature of 700°С weakens the texture on the irradiated side for Mo and Ta foils without affecting the texture of the nonirradiated side.