TPWJ, 2020, #8, 25-28 pages
Peculiarities of producing Al–Ti bimetal sheet joints by the method of vacuum diffusion welding
Iu.V. Falchenko, L.V. Petrushynets and Ye.V. Polovetskyi
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
Given are the results of investigation of the effectiveness of application of vacuum diffusion welding technology to
obtain aluminium-titanium bimetal sheets of 120×120 mm size. The effect of welding parameters on the joint microstructure
and mechanical properties was studied. It is established that welding of foil materials is complicated, because
of its low deformability. Application of thermally stable SiC and WC powders as «activators» in welding does not allow
producing sound joints, because of hard particles embedding into the material being welded, and formation of defects
in the form of through-thickness holes. It is shown that application of steel net for activation of plastic deformation on
the foil contact surfaces, allows a significant lowering of welding pressure and producing defect-free joints between
titanium and aluminium, with 1.7 times higher strength values, compared to layered Al+Ti joints, produced without
using the net. 12 Ref., 1 Table, 6 Figures.
aluminium, titanium, foil, bimetal joints, diffusion welding
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