Numerical Simulation in Laser Welding-Soldering of the Titanium and Aluminum Alloys

Abstract

The paper presents results of studying the modes in laser welding-soldering of the thin rectangular plates made of titanium and aluminum alloys without using a solder. The plates in soldering were in tight contact with the narrow edges. The laser beam was directed perpendicular to the titanium plate surface. It was moved at a constant speed parallel to the plates contact plane at a certain distance from it. Depending on this distance, the laser power and the beam displacement rate values were selected in such a way that the titanium plate should melt through its entire thickness, and the vapor channel formed in the weld pool was not reaching the titanium plate lower surface. The lower-melting metal (aluminum alloy), due to the titanium thermal conductivity, was heating above the aluminum melting point, was interacting with its solid surface and forming a permanent brazed joint with titanium upon further cooling. Based on the proposed thermophysical model, the process parameters were computed for two options ensuring the plates soldering. The first showed that at a given power and speed of the laser beam displacement, the distance from the beam axis to the contact surface was found. The second demonstrated that the laser beam power and speed required in soldering the dissimilar plates were computed for a fixed distance

The work was carried out within the framework of a State Assignment (registration number 121030500137-5 and AAAAA-A19-119051590004-5)

Please cite this article in English as:

Isaev V.I., Shapeev V.P., Cherepanov A.N. Numerical simulation in laser welding-soldering of the titanium and aluminum alloys. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2024, no. 5 (116), pp. 15--32 (in Russ.). EDN: OAHCDR

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