Formation of residual stresses in the surface layers of targets from titanium alloys under irradiation with high-current pulsed electron beams
X-ray difraction analysis, optical metallography and transmission electron microscopy have shown that irradiation with high- current pulsed electron beams in the melting mode leads to the formation in the surface layer of samples of VT6 and VT8 alloys with a thickness of up to 20 μm residual compressive stresses and a inely dispersed globular-lamellar microstructure with a predominant orientation of a-, a′- and a″-plates parallel or nearly parallel to the surface, which should lead to an increase in the fatigue strength of the and bending tests. At the same time, on the surface of samples from VT9 alloy at any electron beam energy densities, the process of formation of residual tensile stresses takes place, for the removal of which it is necessary to perform a vacuum annealing.