Surface processing of titanium alloy parts by intense electron beams

摘要

This paper reviews researches investigating the application of intense pulsed electron beams (IPEBs) for the surface treatment of materials. The high-energy density (w=l-50 J·cm~(-2)) of these short-pulsed (τ=l-20 μs) beams (with diameter d=3-6 cm, and energies E=20-150 keV) makes them ideal in flash heating a target surface. IPEB surface irradiation induces rapid melt and solidification at up to 10~(10) K·s~(-1) causing defect layer formation, the producing non-equilibrium microstructures and surface smoothing. At high energy density the target surface is vaporized. It allows to achieve high values of the ablation rate (up to 4-5 μm in a pulse) and to realized the recycling of aircraft engine components: compressor and turbine blades and disks. Advanced IPEB technologies for the surface modification and for the recycling of the compressor and turbine blades and disks from titanium refractory alloys (specifically the blades with resistant coatings from ZrN) are also described.