Numerical simulation of hot extrusion of a novel Mg-Zn-Ca alloy and its comparison with AZ31 alloy
Reeturaj Tamuly, Digavalli Ravi Kumar, Sivanandam Aravindan
Abstract. The present study is aimed at comparing the behavior of a novel biocompatible Mg-Zn-Ca alloy in hot extrusion with the commercially available AZ31 alloy. Flow stress data of the alloy was obtained using hot isothermal compression tests at different temperatures and strain rates to establish a suitable constitutive model. Using this constitutive model, the hot extrusion simulation was carried out using a conical die with a die angle of 60° and a flat die at an extrusion temperature of 300°C and 350°C and an extrusion speed of 10 mm/s. The extrusion tools were designed in such a way that an extrusion ratio of 10:1 was achieved. The effect of die geometry on metal flow velocity and the extrusion load were investigated from the simulations for both the alloys. The flow curves obtained from the hot compression tests indicate that the Arrhenius model best predicts the flow behavior of AZ31 alloy whereas a modified version of the Johnson-Cook model has been found to be most suitable for the Mg-Zn-Ca alloy. The predicted values of peak extrusion load from hot extrusion simulations agreed well with the experimental results with a maximum average absolute relative error percentage of 14.40 and 19.91 for AZ31 alloy and Mg-Zn-Ca alloy respectively. For the same process variables, the peak extrusion load in the case of Mg-Zn-Ca alloy has been found to be higher than that of AZ31 alloy.
Keywords
Magnesium Alloy, Hot Extrusion, Numerical Simulation, Constitutive Model
Published online 5/7/2025, 9 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Reeturaj Tamuly, Digavalli Ravi Kumar, Sivanandam Aravindan, Numerical simulation of hot extrusion of a novel Mg-Zn-Ca alloy and its comparison with AZ31 alloy, Materials Research Proceedings, Vol. 54, pp 745-753, 2025
DOI: https://doi.org/10.21741/9781644903599-80
The article was published as article 80 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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