Science and Education Publishing American Journal of Materials Science and Engineering 2333-4673 3 1 2015 04 07 Contribution of the GP Zones to the Hardening and to the Electrical Resistivity in Al10at.%Ag Alloy 7 10 EN Faiza Lourdjane Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria Azzeddine Abderrahmane Raho Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria AJMSE2015312 10.12691/ajmse-3-1-2 2015 03 20 2015 04 03 2015 04 07 Using microhardness and electrical resistivity measurements, the contributions of the matrix and that of the Guinier-Preston zones to the hardening and to the electrical resistivity of the Al10at.%Ag alloy are determined separately during the Guinier-Preston zones precipitation. A linear correlation between the hardness and the electrical resistivity of the as quenched alloys exists. There is also a linear relationship between the contribution of the matrix to the hardening and that to the electrical resistivity of the isothermal aged alloy. However, no linear relation exists between the hardness and the electrical resistivity of the isothermal aged alloy.