Hostname: page-component-77c89778f8-7drxs Total loading time: 0 Render date: 2024-07-20T21:42:12.876Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies on Al–Mg solid solutions using electrical resistivityand microhardness measurements

Published online by Cambridge University Press:  15 August 1999

A. Gaber ,
N. Afify ,
S. M. El-Halawany  and
A. Mossad
A. Gaber*
Affiliation:
Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
N. Afify
Affiliation:
Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
S. M. El-Halawany
Affiliation:
Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
A. Mossad
Affiliation:
Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
*
afify@aun.eum.eg
Get access

Abstract

Al-C at% Mg alloys (C = 0.82, 1.84, 3.76, 5.74 and 12.18) have been selected for this study. From the electrical resistivity measurements it is concluded that the resistivity increment of Al–Mg alloys (in a solid solution state) is proportional to the atomic fractional constituents (Mg and Al) as $\Delta\rho_{\rm all}=64.66\ c(1-c)~\mu\Omegarm$ cm. In addition, both the temperature coefficient of resistivity, αall and the relaxation time of the free electrons τall in the alloys diminish with increasing the solute Mg concentration. The increase of the scattering power, η, with increasing C is interpreted to be due to the contribution of electron-impurity scattering. The percentage increase due to electron-impurity scattering per one atomic percent Mg has been determined as 12.99%. The Debye temperature θ decreases as the Mg concentration increases. The microhardness results showed that the solid solution hardening obeys the relation ΔHVs = 135.5C0.778 MPa which is comparable to the theory of solid solution hardening for all alloys; ΔHVs ≈ C0.5−0.67 MPa.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 7 , Issue 2 , August 1999 , pp. 103 - 109
Copyright
© EDP Sciences, 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

C.J. Peel, B. Evans, C.A. Baker, D.A. Bennett, P.J. Gregson, H.M. Flower, Proceedings of the Second Inter. Aluminum-Lithium Conference, Monterey, California, April 1983, Met. Soc. AIME (1984), p. 363.
Gaber, A., Afify, N., Abdel-Latief, A.Y., Mostafa, M.S., Solid State Commun. 86, 679 (1993). CrossRef
R.M. Brick, R.B. Gordon, A. Phillips, Structure and properties of alloys (Mc Graw-Hill, Inc., New York, 1965), p. 149.
Panseri, C., Federighi, T., Acta Metall. 8, 217 (1960). CrossRef
Smugeresky, J.E., Herman, H., Pollack, S.R., Acta Metall. 17, 883 (1969). CrossRef
Herman, H., Cohen, J.B., Fine, M.E., Acta Metall. 11, 43 (1963). CrossRef
Merlin, J., Manzioni, V.M., Fouquet, F., Vigier, G., Mem. Sci. Rev. Metall. 75, 327 (1987).
Luiggi, N., Simson, J.P., Guyot, P., Acta Metall. 28, 1115 (1980). CrossRef
Gaber, A., Afify, N., J. Mater. Sci. 27, 1347 (1992). CrossRef
Hillel, A.J., Edwards, J.T., Wilkes, P., Philos. Mag. 32, 189 (1975). CrossRef
Radomsky, C., Loffler, H., Phys. Stat. Sol. (a) 50, 123 (1978). CrossRef
Laslaz, G., Guyot, P., Acta Metall. 25, 277 (1977). CrossRef
Laslaz, G., Kostorz, G., Roth, M., Guyot, P., Stewart, R.J., Phys. Stat. Sol. (a) 41, 577 (1977). CrossRef
Inoue, H., Sato, T., Kojima, Y., Takahashi, T., Metall. Trans. A 12, 1429 (1981). CrossRef
Juhssz, A., Kovscs, I., Lendvai, J., Tasnsdi, P., J. Mater. Sci. 20, 624 (1985).
Radomsky, M., Kabisch, O., Loffler, H., Lendvai, J., Ungsr, T., Kovscs, I., Honyek, G., J. Mater. Sci. 14, 2906 (1979). CrossRef
Detert, K., Thomas, I., Acta Metall. 12, 431 (1964). CrossRef
Gaber, A., Afify, N., Mostafa, M.S., J. Phys. D: Appl. Phys. 23, 1119 (1990). CrossRef
Juhssz, A., Tasnsdi, P., Kovscs, I., Ungsr, T., J. Mater. Sci. 16, 367 (1981).
G.I. Epifanov, Solid State Physics (Mir Moscow, 1979).
L.F. Mondolfo, Aluminium Alloys, Structure and Properties (Butterworths, London, 1967).
Logunov, A.V., Zverev, A.F., Inzhen.-Fis. Z. 15, 1114 (1969).
Handbook of Chemistry and Physics, edited by R.C. Weast (CRC, Cleveland, OH, 1987).
Moore, J.P., McElroy, D.L., Graves, R.S., Can. J. Phys. 45, 384 (1967).
A.Y. Abdel-Latief, Ph.D. thesis, Assiut Univ., Assiut, Egypt, 1983.
Gaber, A., J. Mater. Sci.: Mater. Electr. 1, 137 (1990).
Sayed, H. EL, Kovscs, I., Phys. Stat. Solid. (a) 24, 123 (1974).
P. Haasen, Dislocations in Solids, edited by F.R.N. Nabarro (North-Holland, Amesterdam, 1979), Vol. 4.