Abstract
The effect of trace addition of Sn on the ageing characteristics of Al-0.7% Mg2Si has been studied by hardness measurements and transmission electron microscopy. The changes observed in the microstructural features have been explained on the basis of the strong interaction existing between Sn atoms and quenched-in vacancies. At ageing temperatures below 200°C Sn addition brings about a ratardation in the kinetics of G.P. zone growth whereas at higher ageing temperatures, it aided the precipitate nucleation and growth. The hardness data agree well with the deductions based on observations made on the thin foils.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Ashby M F and Brown L M 1963Philos. Mag. 8 1063–1649
Bell W F, Maher D M and Thomas G 1966The nature of small defect clusters M J Makin (Harwell: Atomic Energy Research Establishment) pp. 314.
Gouthama and Kishore 1981 Paper presented at ICMS Conference on “Thermodynamics and kinetics of metallurgical processes” Bangalore.
Jacobs M H 1972Philos. Mag. 26 1
Kimura H and Hasiguti R R 1961Acta Metall. 9 1076
Muromachi S 1971J. Jpn. Inst. Metals 35 1021
Pashley D W, Jacobs M H and Vietz J T 1967Philos. Mag. 16 51
Sen N and West D R F 1969Phase transformations in crystalline solids, Institute of Metals, Monograph No. 30, pp. 77
Smith W F 1973Metall. Trans. 4 2435
Thomas G 1962J. Inst. Metals 90 57
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gouthama, Kishore Electron microscopic studies on the effect of Sn addition on the ageing characteristics of Al-0.7% Mg2Si alloy. Bull. Mater. Sci. 5, 61–70 (1983). https://doi.org/10.1007/BF02822350
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02822350