Hot Compressive Deformation Behavior of TC4-DT Titanium Alloy

摘要

Hot compressive experiments of TC4-DT titanium alloy were performed on Gleeble 3500 hot simulator. The influence of hot deformation parameters on high temperature deformation behaviors were investigated, including deformation temperature (938 °C~1038 °C), deformation degree and strain rate (O.Ols~(-1)~lOs~(-1)). The results indicated that the peak (a_p) and steady-state flow stress ( σs) of TC4-DT alloy decreased with the increase of deformation temperature under the same strain rate, especially under a high strain rate. The flow stress increased sharply then decreased and kept invariant finally with the increase of deformation degree. The flow stress increased with the strain rate increasing and exhibited different characteristics in different strain rate range. The optimum conditions obtained based on this investigation of TC4-DT alloy as follows: temperature was 938°C~1008°C, stain rate was O.Ols~(-1)~O.ls~(-1).