Formation of a submicrocrystalline structure in a two-phase titanium alloy without severe plastic deformation.

The formation of submicrocrystalline (SMC) Ti–6Al–4V was achieved by imposing a much lower strain (ε =1.4) compared to that typically imposed during severe plastic deformation operations (i.e. 4⩽ ε ⩽8). Electron backscatter diffraction analysis revealed that the novel process was effective in promoting dynamic recrystallization and limiting α grain growth. The SMC sheet had much higher yield strength than usual (1134MPa) and reasonable elongation (∼12%) at room temperature, and exhibited enhanced ductility at elevated temperatures. [ABSTRACT FROM AUTHOR]