Abstract
Solute segregation to grain boundaries is an essential phenomenon that affects multiple mechanical properties of magnesium alloys . In this work, the deformed microstructure in a Mg–Zn–Ca alloy that was compressed at room temperature has been examined by bright-field and high-angle annular dark-field scanning transmission electron microscopy. Domains made of nanograins have been observed in some local areas. These domains exhibit strong texture and most of the nanograins oriented with their \( \left\langle {11\bar{2}0} \right\rangle_{\alpha } \) being paralleled to each other, which is similar to those reported in the Mg–Gd alloy. The grain boundaries of these nanograins involve many isometric tilt boundaries containing twin boundaries. Segregation of Zn/Ca atoms occurs in these tilt boundaries in the cold deformed sample. The segregation forms unique and chemically ordered patterns specific to tilt boundaries.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Sutton, AP, Balluffi, RW (1995) Interfaces in crystalline materials. Oxford Scientific Publications, Oxford.
Cantwell PR, Tang M, Dillon SJ, Luo J, Rohrer GS, Harmer MP (2014) Grain boundary complexions, Acta Mater. 62:1–48.
Wang J, Beyerlein IJ (2012) Atomic structures of symmetric tilt grain boundaries in hexagonal close packed (hcp) crystals. Model. Simul. Mater. Sci. Eng. 20:024002.
Wang J, Beyerlein IJ (2012) Atomic structures of [0\( \bar{1} \)10] symmetric tilt grain boundaries in hexagonal close-packed (hcp) crystals, Metall. Mater. Trans. A 43:3556–69.
Huber L, Rottler J, Militzer M (2014) Atomistic simulations of the interaction of alloying elements with grain boundaries in Mg, Acta Mater. 80:194–204.
Nie JF, Zhu YM, Liu ZJ, Fang XY (2013) Periodic segregation of solute atoms in fully coherent twin boundaries, Science 340:957–960.
Ghazisaeidi M, Hector Jr. LG, Curtin WA (2014) Solute strengthening of twinning dislocations in Mg alloys, Acta Mater. 80:278–287.
Zhu YM, Bian MZ, Nie JF (2017) Tilt boundaries and associated solute segregation in a Mg–Gd alloy, Acta Mater 127:505–518.
Pennycook SJ, Jesson DE (1992) Atomic resolution Z-contrast imaging of interfaces. Acta Metall. Mater. 40:S149.
Acknowledgements
The authors wish to acknowledge gratefully the financial support from the Australian Research Council and the access to the facilities of the Monash Centre for Electron Microscopy.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Zhu, Y.M., Nie, J.F. (2019). Isometric Tilt Grain Boundaries and Solute Segregation in a Deformed Mg–Zn–Ca Alloy. In: Joshi, V., Jordon, J., Orlov, D., Neelameggham, N. (eds) Magnesium Technology 2019. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05789-3_39
Download citation
DOI: https://doi.org/10.1007/978-3-030-05789-3_39
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-05788-6
Online ISBN: 978-3-030-05789-3
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)