Dependence of the rolling degree, characterized
by microhardness, on the anisothermal recrystallization in straight rolled silver
F. Salhi1,3, A. Berrada2, J. Aride3, J. Bernardini1, G. Moya1*
1Laboratoire de Matériaux et Microélectronique de Provence UMR-CNRS n°6137
Université d’Aix-Marseille III, 13397 Marseille Cedex 20, France
2Laboratoire de Physique des Matériaux, Faculté des Sciences, Avenue Ibn Battouta, Rabat, Maroc
3Laboratoire de Physico-Chimie des Matériaux, E.N.S Takaddoum, B.P. 5118, Rabat, Maroc
* Corresponding author . E-mail :firstname.lastname@example.org
Received : 08 December 2003; revised version accepted : 13 May 2004
In pure silver (99.999%) new information concerning recrystallization was obtained using both anisothermal calorimetric and microhardness measurements fordegrees of rolling t varying from 65% to 90%. For two" critical " strains (t1 = 73% and t2 = 85%) corresponding to minima in the variation of the Vickers microhardness one can observe changes of microstructure which affect the kinetics of recrystallization leading to a slower nucleation rate and a variation of the activation energy obtained by anisothermal calorimetric measurements (DSC). For t2 = 85% the study was completed by transmission electronic microscope analysis (TEM).
These results are discussed considering the microstructure behavior with the rolling strain.
Keywords : Silver; Recrystallization; Microhardness; Microstructure.