PSI - Issue 35

E. Emelianova et al. / Procedia Structural Integrity 35 (2022) 203–209 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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dependent roughness curves for the four models are plotted in Fig. 6a. The R d curves demonstrate a non-linear behavior, which is in consistency with earlier numerical and experimental results fo r α -titanium (Fig. 2d). The R d growth rate depends on the texture severity in a way the weaker the texture, the stronger the roughness. It is worth noting that the texture severity, roughness degree, and homogenized stress-strain curves plotted in Fig. 6b correlate to each other. The stronger the basal texture, the smother the surface and the lower the stress-strain curve lies.

Fig. 4. Roughness patterns for BT10 (a), BT20 (b), BT40 (c), and BT60 (d) model microstructures at a strain of 15%.

Fig. 5. Roughness profiles for BT10 (a), BT20 (b), BT40 (c) and BT60 (d) models at different strains.

a

b

Fig. 6 R d dependences on tensile strain (a) and stress-strain curves (b) for polycrystalline models with different texture severity.

Finally, let us analyze plastic strain fields developing in the models with different texture severity (Fig. 7). Again the degree of plastic strain directly correlates with roughening. The stronger the roughness, the more pronounced the strain localization and the larger the scatter of local strain values relative to the mean value. However, common for