Abstract
Two micro-alloyed magnesium alloys, Mg-0.3Al-0.2Ca (AX0302) and Mg-0.1Al-0.5Ca (AX0105), were designed based on the thermodynamics calculation in terms of precipitation temperature. Hot compression tests were conducted at temperatures of 300°C, 350°C and 400°C with strain rates of 0.1s−1, 0.01s−1 and 0.001s−1. Dynamic precipitation of Al2Ca could be found below 400°C in AX0302, while Mg2Ca dynamically formed in AX0105 during deformation at all three temperatures. At high temperature and low strain rate (400°C at 0.01s−1 and 0.001s−1 and 350°C at 0.001s-1), DRX mainly developed at the grain boundaries and formed necklace type microstructure in both alloys. However, at lower temperature and higher strain rate, DRX grains formed at both grain boundaries and twinning boundaries. The combination effect of twinning and dynamic precipitation on dynamic recrystallization was studied by comparing with two alloys.
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Su, J., Kabir, A.S.H., Jung, IH., Yue, S. (2014). Deformation Behavior and Dynamic Recrystallization of Micro-Alloyed Mg-Al-Ca Alloys During High Temperature Deformation. In: Alderman, M., Manuel, M.V., Hort, N., Neelameggham, N.R. (eds) Magnesium Technology 2014. Springer, Cham. https://doi.org/10.1007/978-3-319-48231-6_30
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DOI: https://doi.org/10.1007/978-3-319-48231-6_30
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48589-8
Online ISBN: 978-3-319-48231-6
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