Abstract
The effect of extrusion parameters on the residual stress in the extruded magnesium rod is investigated through FEM. The residual stress on the surface and in the center of the extruded rod is tensile and compressive, respectively, with the axial residual stress showing the highest magnitude. The extrusion temperature is the most influential factor for the residual stress which is followed by extrusion speed and area reduction ratio, and the effect of the friction coefficient and heat transfer coefficient is modest. Increase in both extrusion temperature and extrusion speed causes temperature rise and induces softening, which decreases the residual stress. Since the magnesium alloys show stable stress–strain behavior, the increase in area reduction ratio does not lead to strain hardening but causes temperature rise and softening, which makes the residual stress decrease with increasing area reduction ratio. Optimal extrusion conditions with extrusion parameters leading to low residual stress and fine grains are obtained based on the evolution of residual stress and microstructure with extrusion parameters. The results could be beneficial to the understanding of the residual stress in extruded magnesium alloy and the production of extruded magnesium alloys with low residual stress.
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Funding
This work was supported by the National Key R&D Program of China [2016YFB0301105], National Key Research and Development Plan [2017YFB0103904], and the National Natural Science Foundation of China [No. 51701211].
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Wang, C., Yan, M., Zhou, J. et al. Numerical simulation of the residual stress in the Mg-5Zn-3.5Sn-1Mn-0.5Ca-0.5Cu alloy with different extrusion parameters. Int J Adv Manuf Technol 124, 219–228 (2023). https://doi.org/10.1007/s00170-022-10533-4
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DOI: https://doi.org/10.1007/s00170-022-10533-4