Abstract

The microstructure and texture evolution of isothermally compressed Ti-5Al-2Sn-2Zr-4Mo-4Cr with basketweave microstructure was examined via the high-resolution electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). The rotational recrystallization (RRX) and the geometric dynamic recrystallization (GDRX) were the main recrystallization mechanisms of alpha phase. The typical continuous dynamic recrystallization (CDRX) was the main recrystallization mechanism of beta phase. Meanwhile, near the kinked shape alpha grains, the RRX of beta phase became an auxiliary mechanism to accommodate the high local stress. Besides, the dynamic recrystallization (DRX) in alpha phase played an important role in DRX of beta phase, which resulted in that the fragmental alpha grains were always accompanied with the DRX of beta phase in one macrozone. Moreover, with an intensive deformation, the “macrozone effect” played an important role in accommodating the whole arbitrary plastic strain.

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