Global Journal of Science Frontier Research, A: Physics and Space Science, Volume 23 Issue 11

When compared to the aluminum alloy and steel, the area in the two-phase titanium alloy from which ultrafine α -phase particles migrated to the growing discontinuity sites proved to be no more than 5 μ m. The presence of a significant amount of the α -phase in the LSBs suggests that there may be an additional decay of the β -phase during sample deformation in the standing wave. The phase composition redistribution occurs as a result of the segregation of the α -phase in the wave interference zone (LSBs). Damageability of Metals under Impulse Loading © 2023 Global Journals 1 Year 2023 30 Frontier Research Volume XXIII Issue ersion I VXI ( A ) Science Global Journal of Fig. 11: Segregation of intermetallic compounds on the banks of the localized deformation band in the dispersion- strengthened aluminum alloy Fig. 12: Segregation of α -phase particles of the two-phase titanium alloy at spall damage sites in the spall "plate " Noteworthy is the presence of a spherical bright particle in Fig. 13 b, which was formed at the blurred boundary of cementite and ferrite. The many small spherical particles of cementite scattered throughout Fig. 13 a, b indicate that two differently directed processes occur in the LSBs: the decomposition of cementite and its re- formation. Previously, globular cementite in LSBs was discovered in experiments on dynamic torsion on a Hopkinson installation at a pressure of 0.1–0.3 GPa and the exposure time up to 100 μ s [4]. Thin globular cementite with a size of 0.03–0.06 μ m was released along the boundary with ferrite. d) Globulation of cementite and mass transfer of carbon during localization Figure 13 shows a section of the localization band in the area of the contact of cementite plates (length 2-3 µm) and ferrite (50 µm). During the formation of LSBs in the standing wave, the metal undergoes fragmentation: cementite plates are crushed. However, some fragments retain clear outlines, and their size is 0.2 ‒ 0.5 μ m [33], as seen in Fig. 13 b . According to [34], the size of the fragments can decrease to a minimum limit of 0.20–0.25 μ m as the deformation increases. The blurring of the edges of the cementite plates observed near the ferrite stripes indicates the decomposition of cementite, the size of which is close to the limiting value. It is known that there is a strong interaction between carbon and dislocations. The disintegration of particles during their interaction with dislocations occurs when the binding energy of atoms inside the particles is less than the binding energy of these particles with dislocations. The experimentally observed decomposition of cementite in highly deformed steel reaches 30 – 40% [35]. The numerous dark and gray areas in Fig. 13 represent structureless ferrite.