Effect of heat treatment on hot deformation behavior and microstructure evolution of 2195 Al-Li alloy

2195 aluminum-lithium alloy has numerous applications in industrial production, and the different initial heat treatment state impacts its hot deformation behavior. Therefore, this work seeks to examine the impact of heat treatment states on the microstructure development and deformation behavior of 2195 Al-Li alloys. The experiments have been carried out on a Gleeble-3800 thermo-mechanical simulator in the temperature range 350–500 °C and with a strain rate of 0.01–10 s⁻¹. The microstructure analysis in various regions was compared, and constitutive models and processing maps of the alloys were produced. At high deformation temperatures (400–500 °), the peak stress of the T3 and T8 samples is nearly the same. Low angle boundaries (LABs) and the content of dynamic recrystallization have also been found. Due to solution strengthening and deformation strengthening effects, the 2195-T8 Al-Li alloy plate exhibited a larger deformation activation energy than the 2195-T3 Al-Li alloy. The hot working windows of the Al-Li alloys 2195-T3 and 2195-T8 were determined to be 475–500 ° and 0.01–0.1 s⁻¹, respectively. The research can serve as useful assistance for the Al-Li alloy’s ideal heat treatment conditions during hot working processing.