In this paper, the effects of welding speed and ultrasound on the structure and strength of aluminum-steel bimetals produced by friction stir welding have been investigated. It is shown that the strength of joints in the range of the selected technological ultrasonic impact parameters, as a rule, reduces. This is attributed to the antifriction effect, since ultrasound leads to a decrease in the dissimilar layer interface complexity and the strain of the lower steel layer. A reduction in the welding speed also led to a similar effect. It is noted that the antifriction effect is most strongly exhibited in modes with higher heat generation.
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Eliseev, A.A., Amirov, A.I. Influence of Sonication on the Structure and Strength of Aluminum-Steel Bimetals Produced by Friction Stir Welding. Russ Phys J 66, 1257–1264 (2024). https://doi.org/10.1007/s11182-023-03071-3
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DOI: https://doi.org/10.1007/s11182-023-03071-3