Abstract
Effects of Al and its content on high temperature tensile behaviors and deformation mechanisms of Mg-xAl (x=2, 3, 4, 6 wt. %) alloys were investigated. Elongation-to-failure tests were conducted at constant temperatures of 300, 350, 400, and 450 °C, and constant strain rates of 10−2 and 10- s−1. Strain-rate-change tests were conducted at the same temperatures and varying strain rate from 5×10−5 to 2×10−2 s−1. Experimental results show that elongations of over 100% are achieved for each Mg-xAl alloy when deformed at 450 °C and 10−3 s−1, which are ascribed to an evident drop of stress exponent due to Al addition. Particularly, the stress exponent decreases with an increase of Al content, indicating a potential variation of deformation mechanism. The mechanisms were analyzed and discussed in terms of activation energy, grain boundary sliding, and dislocation creep.
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Ji, Jx., Bian, Fb., He, M., Niu, Tg., Qiao, J. (2016). High Temperature Tensile Behaviors and Deformation Mechanisms Of Mg-x%Al Alloys. In: Singh, A., Solanki, K., Manuel, M.V., Neelameggham, N.R. (eds) Magnesium Technology 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48114-2_46
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DOI: https://doi.org/10.1007/978-3-319-48114-2_46
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48620-8
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