Physical and mathematical modeling of static recrystallization process in the wires of MgCa08 alloy after drawing in heated dies

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Physical and mathematical modeling of static recrystallization process in the wires of MgCa08 alloy after drawing in heated dies

Andrij Milenin, Piotr Kustra, Dorota Byrska-Wójcik, Maciej Pietrzyk

Recrystallization, Magnesium alloys, MgCa08, Drawing, Numerical modelling.

DOI:

https://doi.org/10.7494/cmms.2015.4.0553

Abstract:

Modelling of the manufacturing process of thin wires made of MgCa08 alloy is described in the paper. This process is composed of 25 drawing passes in heated dies for initial wire diameter of 1.0mm and final diameter of 0.1mm. Parameters of the drawing process were chosen in such a way that complete recrystallization of the wire occurred in all passes. The model of static recrystallization (SRX) for MgCa08 alloy was developed to enable design of the drawing process. The parameters of the model were determined on the basis of stress relaxation tests. The tests were performed on GLEEBLE 3800 physical simulator for three temperatures 250, 300, 350ºC and three strains 0.1, 0.2 and 0.3. SRX model was implemented into Drawing2d software, which allows simulation of drawing processes in heated dies. Two variants of drawing process were simulated. In the first variant all passes were performed with the die temperature of 350ºC. In the second variant every second pass was carried out with the die temperature of 21ºC. The verification of simulations was done on the basis of microstructures observed in experiments. The paper aims at showing that the model can predict correctly the final microstructure. Performed experiments and numerical simulations showed that contribution of the dynamic recrystallization is small and it may be neglected in simulation of multi-pass hot drawing of MgCa08 alloy. The results of simulations of the SRX showed that in this process only every second pass has to be realized in a hot die. After each cold pass the hot pass is required in order to restore the plasticity by recrystallization.

Cite as:

Milenin, A., Kustra, P., Byrska-Wójcik, D., & Pietrzyk, M. (2015). Physical and mathematical modeling of static recrystallization process in the wires of MgCa08 alloy after drawing in heated dies. Computer Methods in Materials Science, 15(4), 481-491. https://doi.org/10.7494/cmms.2015.4.0553

Article (PDF):

Keywords:

Recrystallization, Magnesium alloys, MgCa08, Drawing, Numerical modelling

References: