Influence of the technological scheme of friction welding with mixing on the structure and properties of aluminum alloy joints

Abstract

It is shown that the use of various schemes of friction welding with mixing allows to obtain defect-free compounds. At the same time, the joint strength coefficient for the aluminum alloy 1565CHM decreases when switching from a one-sided STP to a STP with a bobbin tool from 0.97—0.99 to 0.90—0.95. For the dispersed-hardened composite material 1565CHM + 20% SiC, the joint strength coefficient is practically independent of the applied technological scheme and is at the level of 0.76—0.83. The average grain size in the seam core of the welded plates of the alloy 1565CHM by one-sided friction welding with mixing is 4.9 ± 1.8 microns. With double-sided STP of 1565CHM alloy plates, the average size in the seam core increases insignificantly to 6.3 ± 1.6 microns. In the case of STP with a bobbin tool, the largest grains in the metal of the seam core with a value of 11.5 ± 1.4 microns are observed.

Keywords:

• Aluminum alloys
• dispersed-hardened composite material
• friction welding with mixing
• tool
• time resistance
• grain size
• intergranular corrosion

Additional information

Funding

The research for the original work was carried out with the financial support of the Russian Foundation for Basic Research (RFBR) under project No. 19-33-90272.