Evaluation on the hot workability of as-extruded TA2 pure titanium using processing map

Abstract

The processing map on the basis of dynamic material model has been recognized to be an effective method to evaluate the hot workability of metal alloys. To evaluate the mechanical behavior of TA2 pure titanium, a sets of hot compression tests were conducted on the TMTS machine in the temperature range of 800°C–1000°C and the strain rate range of 0.01–10 s−1. Then, the processing map is constructed from the strain–stress data with the strain of 0.25, 0.4, 0.55, and 0.7. The fact that the strain will not impact the workability obviously for the little change of the stable regions of the processing maps in different strains was discussed. Finally, an overall consideration was given in the processing maps and the optimized workability of TA2 should be within the strain rate range of 0.5–1 s−1 and temperature range of 900°C–925°C.