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Solid Solution Decomposition of Aluminum-Rich Aluminum-Zinc-Silver Alloys

Published online by Cambridge University Press:  06 March 2019

S. R. Bates  and
R. W. Gould
S. R. Bates
Affiliation:
University of Florida Gainesville, Florida 32601
R. W. Gould
Affiliation:
University of Florida Gainesville, Florida 32601
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Abstract

Solid solution decomposition of several aluminumrich aluminum-zinc-silver alloys were investigated using x-ray small angle scattering, x-ray diffraction (Guinier and Dewolff camera) and transmission electron microscopy. A decomposition sequence was observed directly fay means of hot stage electron microscopy, to be:

G. P. zone → ɛ' → ɛ

G.P. zones were observed to exist in all of the ternary Al-Zn-Ag alloys used in this investigation. Only one type of G.P. zone was detected and evidence is given which indicated that the G.P. zone formation was governed by the existence of a metastable miscibility gap. Experimental results also indicated that the lattice of the matrix is distorted by the presence of the G.P. zone.

A transition phase, designated ɛ', was observed to nucleate on defects in the matrix and to have a hexagonal close-packed structure. The ɛ' phase is partially coherent and much more regular in spatial distribution than the equilibrium ɛ phase.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 14: Nineteenth Annual Conference on Applications of X-ray Analysis, August 5-7, 1970 , 1970 , pp. 146 - 162
Copyright
Copyright © International Centre for Diffraction Data 1970

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References

Wilm, A., Metallurgie, 8, 225 (1911).Google Scholar
Harkness, S. D., Gould, R. W. Hren, J. J. and Sheble, A., Rev. Sci. Inst., 38, 1676 (1967).Google Scholar
Gerold, V., Conference on Small Angle X-Ray Scattering (Syracuse University, 1965).Google Scholar
Warren, B. E. and Averbach, B. L., Modern Research Techniques in Physical Metallurgy (ASH, Cleveland, 1953).Google Scholar
Guinier, A., X-Ray Diffraction in Crystals, Imperfect Crystals and Amorphous Bodies (W. H. Freeman and Co., San Francisco, 1963).Google Scholar
Sparks, C. J. and Borie, B., Local Atomic Arrangements Studied by X-Ray Diffraction (Gordon and Breach, New York, 1965).Google Scholar
Gerold, V., Physica Status Solidi, 1, 37 (1961).Google Scholar
Murakami, M. Kawano, O. and Murakami, Y., Acta Met., 17, 29 (1969).Google Scholar
Auer, H. and Gerold, V., Z. Metall., 56, 240 (1965).Google Scholar
Gerold, V., Physica Status Solidi, 1, 37 (1961).Google Scholar
Baur, R. and Gerold, V., Acta Met., 10, 637 (1962).Google Scholar
Koster, W., Müller, R. and Seelhorst, J., Z. Metall., 55, 589 (1964).Google Scholar
Hren, J. J. and Thomas, G., TAIME, 227, 208 (1963).Google Scholar
Panseri, C. and Federighi, T., Acta Met., 8, 217 (1960).Google Scholar
Westmacott, K. H. and Barnes, R. S., Phil. Mag., 51, 929 (1961).Google Scholar