Flow behavior and microstructure evolution of a P/M TiAl alloy during high temperature deformation

► The size of the dynamically recrystallized grains decreased with increasing the value of parameter Z. ► The size of dynamically recrystallized grains almost remains constant with increasing deformation strain. ► The transition from discontinuous dynamic recrystallization to continuous dynamic recrystallization as the strain increased was observed. ► Twinning was observed under all deformation conditions. ► The spheroidization of the α2 took place at the compression temperature 950 °C and the strain rate 10−3 s−1.