2020 №08 (03) DOI of Article
2020 №08 (05)

The Paton Welding Journal 2020 #08
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: office@paton.kiev.ua

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.
Keywords: aluminium, titanium, foil, bimetal joints, diffusion welding

Received 07.07.2020


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