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*

1 Laboratoire de Matériaux et Microélectronique de Provence UMR-CNRS n°6137

Université d’Aix-Marseille III, 13397 Marseille Cedex 20, France

2 Laboratoire de Physique des Matériaux, Faculté des Sciences, Avenue Ibn Battouta, Rabat, Maroc

3 Laboratoire de Physico-Chimie des Matériaux, E.N.S Takaddoum, B.P. 5118, Rabat, Maroc

* Corresponding author . E-mail : gerard.moya@univ.u-3mrs.fr

Received : 08 December 2003; revised version accepted : 13 May 2004

 

Abstract

In pure silver (99.999%) new information concerning recrystallization was obtained using both anisothermal calorimetric and microhardness measurements for degrees 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.

© 2015