from the conferences organized by TANGER Ltd.
The influence of thermomechanical processing history on the microstructure and thermomechanical behavior of Ti-3Al-8V-6Cr-4Zr-4Mo titanium alloy was subjected to the analysis in this research. The alloy flow stress curves were elaborated basing on compression tests performed under various temperatures and strain rates. Various criteria of stability and instability of the material flow were taken into account to analyze the material behavior under various thermomechanical conditions. The research shown, that the inhomogeneity of the alloy's microstructure in the initial state is a significant factor affecting the inhomogeneity of deformation. It was also shown, that the processing maps developed using various criteria are an effective tool in predicting flow instability and optimising hot forming parameters. The processing maps clearly showed the set of thermomechanical parameters potentially leading to the formation of adiabatic shear bands and strain localisation during deformation of the investigated alloy, but also enabled identifying optimal conditions for dynamic recrystallisation of the material. The obtained results may have direct applications in the design of thermomechanical processing of the investigated titanium alloy under industrial conditions.
Keywords: Beta titanium alloy, flow curves, processing maps, microstructure analysis© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.