LAUSR

Abstract The texture and the elastic constants of polycrystalline 15YuTA steel are determined before and after fatigue tests. The elastic constants are obtained in terms of the Sayers model in the Hill approximation from the condition of equality of the acoustic and X-ray diffraction coefficients of an orientation distribution function ( $$W_{4}^{{00}}$$ , $$W_{4}^{{20}}$$ ). As a result of high-cycle fatigue tests, the elastic constants of the steel are found to decrease due to a decrease in its density because of loosening.