Research of the texture and residual stress in E110 after surface modification and hydrogen exposure

The effect of modifying the surface of components from the zirconium alloy E110 by pulsed carbon ions, irradiating electrons and titanium ions in the oxygen medium on the formation of a structural-phase and stress state in them and the patterns of interaction of surface modification with hydrogen were studied. Treatment by carbon and titanium ions does not change the basal texture of the initial E110 sheet. Irradiation by electrons leads to a significant weakening of the basal texture of the initial sheet. Holding in hydrogen leads to the formation of ZrH_1.5 hydride in samples treated by carbon and titanium ions, but in samples, irradiated by electrons even traces of hydride were not detected. It is shown that surface modifications are accompanied by a transition from the compressive stresses of the initial product (100–120 MPa) to tensile stresses from 100 to 150 MPa. It was shown that after carbon and titanium ion modification the hydrogen exposure leads to a change in the stress state from tension to compression (20–70 MPa). In samples irradiated by electrons tensile stresses (70 MPa) were preserved. (paper)