Deformation Behavior оf Pure Zinc Under Uniaxial Compression

The article presents the results of a study of the deformation behavior of pure zinc (99.975%) under uniaxial compression. On the Hydrawedge module of the Gleeble-3800 physical simulator, the effect of strain rate 0.1; 1; 10 and 100 s−1 and sample heating temperatures of 24, 120 and 220 ℃ was studied. An increase in the compression rate during cold deformation leads to deformation heating of the samples. At a strain rate of 1 s–1, the sample temperature reaches 65 ℃, and at 10 s−1–95 ℃. A deformation rate of 100 s–1 causes instantaneous heating of the sample to 75 ℃ and a subsequent gradual increase in temperature to 95 ℃. An increase in temperature and the accumulation of defects in the crystal structure caused by deformation lead to the development of processes not only of dynamic recovery but also of dynamic recrystallization. Based on the results of the experiments, the dependences “true strain (ε)—true stress (σ)” were obtained, which after analysis were added to the QForm program database. The rheological properties obtained during experimental studies make it possible to increase the reliability of the results of zinc metal forming simulation and to reasonably select heating and deformation parameters when designing technological modes. The article provides an example of using the obtained dependencies to simulate the open die forging and extrusion of zinc wire.