X-Ray Diffraction Analysis of the Influence of the Absorbed γ-Irradiation Dose on Ti3Al Structural Characteristics

Resumo

The influence of absorbed γ-quantum irradiation doses D_γ (⁶⁰Co isotope) on the structural parameters of Ti₃Al single-phase compounds is experimentally investigated. The structural characteristics are defined more accurately using X-ray diffractometry. On account of the results of structural studies, it is found that exposure to low γ-radiation doses (e.g., D_γ = 1 × 10³ Gy) generates the nonequilibrium state of the Ti₃Al structure. An increase in the absorbed dose (to D_γ = 1 × 10⁵ Gy) stimulates the formation of a metastable radiation-induced state, which is identified by diffraction-reflection splitting, an increase in the crystal-lattice volume, and changes in the parameters of the fine structure (the coherent-scattering-region size decreases to 13 nm, and the defect concentration increases).