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.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
S.C. Wang and M.J. Starink, “Precipitates and intermetallic phases in precipitation hardening Al-Cu-Mg-Li alloy,” International Materials Reviews, 50 (2005),193–215.
R.N. Wilson and P.G. Partridge, “The nucleation and growth of S’ precipitates in an aluminium-2.5% copper-1.2% magnesium alloy,” Acta Metallurgica, 13 (1965), 1321–1327.
Z.Q. Feng et al., “Variant selection and the strengthening effect of S precipitates at dislocations in Al-Cu-Mg alloy,” Acta Materialia, 59 (2011), 2412–2422.
Z.Q. Feng et al., “HRTEM and HAADF-STEM tomography investigation of the heterogeneously formed S (Al2CuMg) precipitates in Al-Cu-Mg alloy,” Philosophical Magazine, 93 (2013), 1843–1858.
P. Ratchev et al., “Precipitation hardening of an Al-4.2wt% Mg-0.6wt% Cu alloy,” Acta Materialia, 46 (1998), 3523–3533.
A. Tolley, R. Ferragut and A. Somoza, “Microstructural characterisation of a commercial Al-Cu-Mg alloy combining transmission electron microscopy and positron annihilation spectroscop,” Philosophical Magazine, 89 (2009), 1095–1110.
Z.Q. Feng et al., “Precipitation process along dislocations in Al-Cu-Mg alloy during artificial aging,” Materials Science and Engineering A, 528 (2010), 706–714.
A. Kelly and R.B. Nicholson, “Precipitation hardening,” Progress in Materials Science, 10 (1963), 151–391.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 TMS (The Minerals, Metals & Materials Society)
About this paper
Cite this paper
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
Download citation
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
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)