On the microstructure evolution and controlling of a 2 vol% TiCp/β-Ti composite during hot deformation

Abstract

In this study, microstructure and texture evolution of TiC p /β-Ti composites during hot deformation were investigated. The results indicated that high deformation temperature and low strain rate are beneficial to promote dynamic recrystallization (DRX). Besides, the DRX mechanism is dominated by continuous dynamic recrystallization and discontinuous dynamic recrystallization during hot compression. During hot compression, the 〈101〉-oriented grains will rotate to the 〈111〉 orientation with the highest Taylor factor, the <111>-oriented grains will change to the 〈001〉 orientation with the lowest Taylor factor, and the <001>-oriented grains tend to rotate to the <101> orientation with higher Taylor factor under relatively long deformation time. Moreover, the lower strain rate is conducive to the formation of θ-fiber and γ-fiber and reduces the texture strength. In addition, compared with hot compression, multi-directional forging (MDF) can significantly refine the grains without producing texture. And TiC p plays a role in particle-stimulated nucleation during hot deformation • The microstructure evolution and the dynamic recrystallization mechanism during hot compression were investigated. • The transformation of grain orientation and effect of strain rate on texture evolution during deformation were revealed. • Compared with hot compression, multi-directional forging can significantly refine the grains without producing texture. • TiC p play a role in particle-stimulated nucleation during hot deformation.