American Journal of Materials Science and Engineering
ISSN (Print): 2333-4665 ISSN (Online): 2333-4673 Website: Editor-in-chief: Dr. SRINIVASA VENKATESHAPPA CHIKKOL
Open Access
Journal Browser
American Journal of Materials Science and Engineering. 2015, 3(1), 11-14
DOI: 10.12691/ajmse-3-1-3
Open AccessArticle

Precipitation Kinetics of the GP Zones in Al4,65at.% Ag(15%Wt.)

Faiza Lourdjane1 and Azzeddine Abderrahmane Raho1,

1Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria

Pub. Date: April 09, 2015

Cite this paper:
Faiza Lourdjane and Azzeddine Abderrahmane Raho. Precipitation Kinetics of the GP Zones in Al4,65at.% Ag(15%Wt.). American Journal of Materials Science and Engineering. 2015; 3(1):11-14. doi: 10.12691/ajmse-3-1-3


The precipitation of the Guinier-Preston zones in Al4,65at.% Ag(15%wt.), studied using an electrical resistivity measurements technique during an isothermal aging, follows a nucleation, growth and coarsening stages. The particles growth obeys the JMAK law while their coarsening, the LSW theory. The diffusion coefficient of the solute atoms, during the GP zones formation at 125°C, is in the order of (8,69 ± 2,17).10-21m2/s. The electrical resistivity of the alloy results from the contribution of the Guinier-Preston zones and that of the matrix. Due to the weak Guinier-Preston volume fraction, the electrical resistivity of the alloy is essentially due to the matrix contribution.

precipitation GP zones electrical resistivity diffusion

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit


[1]  Koji Inoke, Kenji Kaneko “Severe local strain and the plastic deformation of Guinier-Preston zones in the Al–Ag system revealed by three-dimensional electron tomography «Acta Materialia 54 (2006) 2957-2963.
[2]  A.M. Abd El-Khalek, « Transformation characteristics of Al-Ag and Al-Ag-Ti alloys » Journal of alloys and compounds 459, (2008) 281-285.
[3]  PH, A, Dubey. «Shape and internal structure of Guinier-Preston zones in Al-Ag» Acta metall.mater 39 (1991)1161-1170.
[4]  B.Schönfeld, A. Malik, G. Korotz, W.Bürher and J.S.Pedersen «Guinier-Preston zones in Al-rich Al-Cu and Al-Ag single crystals ».Physica B234-236 (1997) 983-985.
[5]  K.Matsumoto, S.Y. Komatsu, M. Ikeda, B. Verlinden, B. Ratchev, “Quantification of volume fraction of precipitates in an aged Al−1.0 mass%Mg2Si alloy”MaterialsTransactions, 2000, 41 (10) 1275-1281.
[6]  Raeisinia B., Poole W.J., Lloyd D.J., “Examination of precipitation in the aluminum alloy AA6111 using electrical resistivity measurements.” Materials Science and Engineering A, 2006, 420 (1-2), 245-249.
[7]  J. B. Nelson, D. B. Riley, “An experimental investigation of extrapolation methods in the derivation of accurate unit-cell dimensions of crystals.”, 3rd Proc. Phys. Soc. London, 57 (1945), p. 160-177.
[8]  A.J.Hillel, J.T. Edwards, P.Wilkes, “Theory of the resistivity and Hall effect in alloys during Guinier-Preston zone formation.”, Philiosophical Magazine 1975, 32 (1), 189-209.
[9]  P.L.Rossiter, P.Wells, “The dependence of electrical resistivity on short-range order.”, Journal of Physics, 1971, 4 354-363.
[10]  M. Rosen, E. Horowitz, L. Swartzendruber, S. Fick and R. Mehrabian. “The aging process in aluminium 2024 studied by means of eddy currents.” Mater. Sci. and Engineering 53 (1982), p.191
[11]  I.M.Lifshitz and V.V.Slyosov, “The kinetics of precipitation from supersaturated solid solutions,”J.Phys.Chem.Solids, 1961, 19, 35-50.
[12]  C.Wagner Z.Electrochem, “Theorie der Alterung von Niderschlagen durch Umlösen (Ostwald Reifung),” 1961, 65, 581-591.
[13]  B. Predel and W.Gus. “Diskontinuierliche ausscheidungsreaktionen im system Aluminium-Silber und ihre beeinflussung durch dritte legierungspartner” 10(1), 211-222, (1972).
[14]  T.Ungar, J. Lendvai and I. Kovacs, “Metastable phase diagram of the Al-Zn-Mg alloy system in the low concentration range of Zn and Mg”, 1979, Aluminium 55, 663-669.