Abstract
The investigation is concerned with the influence of the prestrain temperature of Zn (99.998 at%) and ZnGa 0.2 at% monocrystals in the (0001) 〈1120〉 basal system and {1122} 〈1123〉 pyramidal system on the hardening in the basal system. The investigations were carried out at 77, 295, and 473 K with the strain rate ε = 7 × 10−4s−1. The value of the initial shear strain was γ = 0.05. The temperatures of the prestrain were different from the temperature of the main strain. The research proved that in case of pure zinc monocrystals the system of the prestrain has a significant influence on the hardening processes, while the prestrain temperature is of smaller significance. The measured activated volumes in prestrained crystals suggest that obstacles in different slip systems have been generated by prestraining. In case of ZnGa monocrystals the processes of hardening are more complex and the prestrain temperature also plays an important role.
Published Version
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