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Basic defects arising during the friction stir welding (FSW) of aluminum alloy butt-joints are systemized. There are revealed basic reasons of such defects arising such as faulty fusions, a flash, a metal overheating on the right side of a seam. A range of optimum correlations expressing a length of linear displacement of a tool along a joint during its one revolution (feed for one revolution) is defined, in which a qualitative formation of aluminum alloy seams is ensured. A possibility of defect correction by means of the repeated FSW pass is shown.
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Овчинников et al. (2019) studied this question.
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