Pulse Condenser Welding of Functional Cu—Al Alloys and Its Effect on the Structure of the Joint Area

D. M. Kaleko$^{1}$, S. M. Kedrovsky$^{2}$, Yu. M. Koval’$^{2}$, V. M. Slepchenko$^{2}$

$^{1}$E. O. Paton Electric Welding Institute, NAS of Ukraine, 11 Kazymyr Malevych Str., UA-03142 Kyiv, Ukraine
$^{2}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 08.10.2015. Download: PDF

The presence of a number of advantages of Cu—Al alloys with shape-memory effect (SMA), namely, a high-temperature range of the thermoelastic martensitic transformations and a relatively low cost, allows us to hope about increase of their industrial fabrication and technical application. Therefore, the metallographic study of the structure and functional characteristics of the joints obtained by pulse welding techniques has an actuality. Such techniques are the condenser resistance welding (spot and butt) and arc-contact percussion condenser welding. As shown in the microstructure and mechanical properties’ investigations, depending on the welding conditions, joints can be obtained in a solid state or with a crystallized metal in the weld area. That applies to both the homogeneous joints and the joints of structural materials (copper, low-carbon and stainless steels) with Cu—Al SMA. Resistometric investigations of welded samples obtained by pulse welding techniques show the practical retain of the SMA functional characteristics. As concluded, there is a possibility of applying pulse welding for joining Cu—Al SMA in homogeneous and heterogeneous combinations with structural metals.

Key words: shape-memory alloys, Cu—Al alloys, condenser metal welding, thermoelastic martensitic transformation.

URL: http://mfint.imp.kiev.ua/en/abstract/v37/i12/1663.html

DOI: https://doi.org/10.15407/mfint.37.12.1663

PACS: 06.60.Vz, 62.20.fg, 64.70.kd, 81.05.Bx, 81.20.Vj, 81.30.Kf, 84.37.+q

Citation: D. M. Kaleko, S. M. Kedrovsky, Yu. M. Koval’, and V. M. Slepchenko, Pulse Condenser Welding of Functional Cu—Al Alloys and Its Effect on the Structure of the Joint Area, Metallofiz. Noveishie Tekhnol., 37, No. 12: 1663—1680 (2015) (in Russian)

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