OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 3 2022 a b c d Fig. 1. X-ray diffraction patterns of the Al0.3CoCrFeNi high-entropy alloy in pre-deformed state (a); after annealing at 400 C (b); after cold rolling with 40 % (c) and 80 % (d) reduction Ta b l e 1 Young’s modulus of Al0.3CoCrFeNi alloy in different directions Direction [111] [200] [220] [311] [222] [400] [311] [420] [422] [333] Ehkl, GPa 432 178 318 246 432 178 345 248 318 432 Ungar et al. [17, 18]. In particular, such models include the modifi ed Williamson-Hall model used in this work (Equation 7). It is known that the structural defects are the reason of occurrence of stresses of the crystal lattice. The most common defects in the crystal structure are point defects, dislocations, stacking faults, twins, as well as grain and subgrain boundaries [19]. In addition to reducing the approximation error, the use of the modifi ed Williamson-Hall method makes it possible to obtain additional information about the features of the defect structure of the crystal lattice. Thus, in the case of the analysis of polycrystalline materials with a cubic crystal lattice, it becomes possible to determine such microstructure parameters as the distribution of dislocations by type (screw/edge), as well as the probability to fi nd stacking faults and twins. Experimental data and fi gures obtained using various models are presented in Figs. 2, 3 and 4. From the presented fi gures it can be concluded that the entering of adjustments allows reducing the variance of values and bringing the trend closer to a linear one. This conclusion is confi rmed by the analysis of
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