Abstract
Improving mechanical properties of magnesium and understanding fracture behavior under impact loading are necessary to apply magnesium alloys to structural components of automobiles. We have investigated the fracture behavior of binary magnesium alloys by three-point bending experiment and conducted a first principle calculation to estimate the effect of solute segregation on fracture energy. In this paper, we have focused on experimental result of impact three-point bending test for Mg-0.3at.%Y alloy and the results of the test were compared with that of AZ31 commercially available alloy [1]. As a result, the crack propagation speed of Mg-0.3at.%Y was found to be slower than that of AZ31 alloys. Moreover, the absorbed energy of Mg-0.3at.%Y was more than twice as high as that of AZ31 alloys. These results suggested that yttrium solute in magnesium improved the fracture toughness of magnesium under impact loading. Then, fracture surface was observed by SEM to consider the effect of microstructure on crack propagation speed.
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Kawa, T., Yamaguchi, M., Ikeo, N., Mukai, T. (2015). Effect of Solute Segregation on Fracture Behavior of Mg Alloy. In: Manuel, M.V., Singh, A., Alderman, M., Neelameggham, N.R. (eds) Magnesium Technology 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48185-2_37
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DOI: https://doi.org/10.1007/978-3-319-48185-2_37
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48611-6
Online ISBN: 978-3-319-48185-2
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