OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 25 No. 3 2023 a b Fig. 7. Amplitude dependence of the absorption coefficient for welded joints: a – steel 45 + steel 45; b – steel 45 + steel R6M5 a b Fig. 8. Relation between the absorption coefficient and relative strength of the joint: a – steel 45 + steel 45; b – steel 45 + R6M5 for different torque amplitudes The connection of the rigidity of welded joints with relative strength is shown in fig. 10. The dependences are plotted at the amplitude of the torque T = 137.2 N×m. The dashed lines indicate 96 % confidence interval for the theoretical regression line. A similar area is built on all graphs. Non-destructive methods are proposed to determine the strength of butt joints obtained by pressure welding, according to its rigidity and damping ability [9, 15, 16] based on the experimental studies discussed a b Fig. 9. Amplitude dependence of stiffness of welded joints: a – steel 45 + steel 45; b – steel 45 + steel R6M5
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