Avtomaticheskaya Svarka (Automatic Welding), #1, 2020, pp.15-24
Numerical prediction of kinetics of the state of beam products of different thicknesses during layer-by-layer electron beam surfacing
O.S. Milenin1, O.A. Velikoivanenko1, S.S. Kozlitina1, S.M. Kandala1, A.E. Babenko2
E.O. Paton Electric Welding Institute of the NAS of Ukraine, 11 Kazymyr Malevich Str., 03150, Kyiv, Ukraine.
National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37 Pobedy Ave., Kyiv-56, Ukraine
A complex of mathematical models and their computer means for numerical prediction of the kinetics of temperature fields, phase and structural states, mechanical stresses and deformations in layer-by-layer formation of typical products of titanium-based alloys was developed. On the typical examples of electron beam surfacing of T-shaped beam structures of titanium VT6 alloy produced with the help of xBeam 3D Metal Printer technology, the peculiarities of their kinetics depending on the technological parameters of production were investigated. The influence of the thickness of the substrate on regularities of the temperature field development during layer-by-layer formation of beam elements and on the structural state of the metal after complete cooling was shown. On the example of forming a thick-walled T-shape product it was shown, that an important factor, that allows obtaining a low level of residual stresses, is the optimization of the delay time between the surfacing of each of the beads to provide the conditions of uniform cooling of the structure. 11 Ref., 14 Fig.
Keywords: additive technologies, electron beam surfacing, xBeam 3D Metal Printer, mathematical modelling, macrostructure, mechanical properties, stress-strain state
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