PSI - Issue 40

N. Nikul’chenkov et al. / Procedia Structural Integrity 40 (2022) 354–358 N. Nikul'chenkov et al. / Structural Integrity Procedia 00 (2022) 000 – 000

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Fig. 3. Microstructure of Fe 72.5 Cu 1 Nb 2 Mo 1.5 Si 14 B 9 (SEM) after annealing at 550 ° C (a) and processed image for calculating by software (b) .

Table 1. Calculated CSR sizes and experimentally determined average crystallite sizes in the of Fe 72.5 Cu 1 Nb 2 Mo 1.5 Si 14 B 9 alloy after different annealing temperatures. t , °С CSR ( L ), nm d av , nm 20 2 Not defined 550 14 17 700 86 85

Fig. 4. Microstructure of a ribbon of Fe 72.5 Cu 1 Nb 2 Mo 1.5 Si 14 B 9 after annealing at 700 °C (SEM) with a demonstration of statistical metallographic analysis. 4. Conclusions The results of processing the XRD data and SEM of Fe 72.5 Cu 1 Nb 2 Mo 1.5 Si 14 B 9 alloy samples are summarized in Table 1. It is important to note that the results of calculating the sizes of crystallites obtained by statistical