OBRABOTKAMETALLOV TECHNOLOGY Vol. 26 No. 1 2024 Ta b l e 1 Results of measuring the dimensions of single surfaced layers, mm without the infl uence of a magnetic fi eld width 3.00 3.00 3.10 2.90 3.10 3.30 3.00 2.80 2.90 height 2.85 2.25 2.50 2.50 2.20 2.30 2.70 2.70 2.55 under the infl uence of a magnetic fi eld width 4.40 4.40 4.20 3.65 3.70 4.20 4.10 3.80 3.90 height 1.80 2.00 2.05 1.95 2.00 2.20 2.20 1.85 1.95 b c Fig. 3. Analysis of the eff ect of a longitudinal magnetic fi eld on the change in dimensions of single surfaced layers: a – table of the results of t-criterion calculation; b – box plot for the height of a single layer; c – box plot for the width of a single layer a Results and discussion The results of measuring the dimensions of single surfaced layers are given in Table 1. The processing of the obtained data when studying the infl uence of the longitudinal magnetic fi eld on the measurements of the width and height of single surfaced layers was carried out in the Statistica program based on the calculation of the t-test for independent samples (fi g. 3). From the results obtained, it follows that the eff ect of the created magnetic fi eld caused a statistically signifi cant change in the dimensions of single surfaced layers, so the layer width increased by 34.1 % (the value of the calculated t-test is −9.585 and the probability that the width of the layers does not diff er is close to zero р ≈ 0); the height of the surfaced layer decreased by 20.2 % (the value of the calculated t-test is 5.799 and the probability that the height of the layers does not diff er is р ≈ 2,7×10−5). Furthermore, the table (see fi g. 3, a) presents the results of the calculation of F-criterion, on the basis of which we can conclude that
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