Effect of the strain rate in the dynamic recrystallization of ETP copper during its hot compression with descending temperatures
DOI:
https://doi.org/10.3989/revmetalm.1143Keywords:
Electrolytic pure copper, Multiple peaks dynamic recrystallization, Damped cosine Avrami model, KJAM, Zener, HollomonAbstract
The main purpose of this project is to establish the effect of strain rate in the dynamic recrystallization of an ETP copper during its hot deformation with descending temperature. For this, there were made some tests of hot compression until true deformations close to one, with four strain rates while the temperature was descending. The tests that were made to the two lowest strain rates, showed a multiple peaks dynamic recrystallization with a rise of the tension instead it reaches the steady state, maybe due a continuous decline of the temperature.With the increase of rate the rest of the tests showed simple peak recrystallization and recovering respectively. The experimental results were compared with the results of a simulation based on the Damped Cosine Avrami Model. The simulation produced results closed to those measured during the multiple peaks dynamic recrystallization. These suggest that the application of this Model may be extended to multiple peaks dynamic recrystallization processes with changeable temperature.
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