Abstract
The grain-boundary segregation of Mg atoms in a high-purity Al-8wt% Mg alloy, water quenched from the solution heat-treatment temperature, has been investigated by energy dispersive X-ray microanalysis in a TEM/STEM electron microscope. Many grain boundaries showed a segregation of Mg atoms to a level 2 to 3 times higher than the alloy composition. In the as-quenched state, Mg was uniformly distributed along the grain boundaries, but formed clusters during ageing at room temperature. Hydrogen bubbles were often associated with these Mg-rich regions. Mg-depleted zones were observed adjacent to most boundaries, but in most cases on only one side of the boundary.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. M. Chen, T. S. Sun, R. K. Viswanadham andJ. A. S. Green,Met. Trans. 8A (1977) 1935.
R. K. Viswanadham, T. S. Sun andJ. A. S. Green,ibid. 11A (1980) 85.
T. S. Sun, J. M. Chen, R. K. Viswanadham andJ. A. S. Green,Appl. Phys. Lett. 31 (1977) 580.
P. Doig, P. E. J. Flewitt andJ. W. Edington,Corrosion 33 (1977) 217.
M. Raghavan,Met. Trans. 11A (1980) 993.
P. Doig andJ. W. Edington,Corrosion 31 (1975) 347.
C. R. Shastry andG. Judd,Met. Trans. 3 (1972) 779.
P. Doig andJ. W. Edington,ibid. 6A (1975) 943.
I. T. Taylor andR. L. Edgar,ibid. 2 (1971) 833.
S. L. Cundy, A. J. F. Metherell, M. J. Whelan, P. N. T. Unwin andR. B. Nicholson,Proc. Roy. Soc. 307A (1968) 267.
G. M. Scamans andA. S. Rehal,J. Mater. Sci. 14 (1979) 2459.
N. J. Zaluzec, “Introduction to Analytical Electron Microscopy (Plenum Press, New York, 1980) p. 121.
G. W. Lorimer, G. Cliff andJ. N. Clark, in “Developments in Electron Microscopy and Analysis, EMAG '75” edited by J. A. Venables (Academic Press, London and New York, 1976) p. 153.
J. I. Goldstein, in “Developments in Electron Microscopy and Analysis, EMAG '75” edited by J. A. Venables (Academic Press, London and New York, 1976) p. 12.
L. Christodolou andH. M. Flower,Acta Met. 28 (1980) 481.
R. Alani andP. R. Swann,Brit. Corrosion J. 12 (1977) 80.
G. M. Scamans,J. Mater. Sci. 13 (1978) 27.
G. Cliff andG. W. Lorimer,J. Microscopy 103 (1975) 203.
P. L. Morris, N. C. Davies andJ. A. Treverton,Institute of Physics Conference Series No. 36 (Institute of Physics, London, 1977) p. 377.
R. Gronsky andP. Furrer,Met. Trans. 12A (1981) 121.
R. W. Balluffi, “Grain Boundary Structure and Kinetics” (American Society of Metals, Metals Park, Ohio, 1980) p. 297.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Malis, T., Chaturvedi, M.C. Grain-boundary segregation in an Al-8 wt % Mg alloy. J Mater Sci 17, 1479–1486 (1982). https://doi.org/10.1007/BF00752263
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00752263