Abstract
The variant distribution and three-dimensional (3D) configurations of the heterogeneously formed S (Al2CuMg) precipitates at dislocations were studied by means of high resolution transmission electron microscopy (HRTEM) and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) tomography. The preferred S variant pair along dislocation was proved to be S1 & S4 or its counterparts, and the inherent characteristic of the crystal structure of the S phase, i.e. the symmetry of pentagonal subunit, was considered to be the fundamental factor determining the preference of variant pair. The obtained 3D reconstructions of the S precipitates formed at helical dislocations can clearly reveal both the morphology of individual S precipitates and the overall configuration of the S precipitates nucleated at these dislocations.
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© 2014 TMS (The Minerals, Metals & Materials Society)
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Feng, Z., Yang, Y., Chen, Y. (2014). Atomic Scale and 3D Characterization of the Heterogeneously Formed S (Al2CuMg) Precipitates at Dislocations in Al-Cu-Mg Alloy. In: Bernard, D., Buffière, JY., Pollock, T., Poulsen, H.F., Rollett, A., Uchic, M. (eds) Proceedings of the 2nd International Congress on 3D Materials Science. Springer, Cham. https://doi.org/10.1007/978-3-319-48123-4_18
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DOI: https://doi.org/10.1007/978-3-319-48123-4_18
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48595-9
Online ISBN: 978-3-319-48123-4
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