1. Mechanics of Materials and Plant Maintenance Research Laboratory (LR3MI); Badji-Mokhtar University of Annaba; P.O. Box 12 23000 Algeria
2. Metallurgy and Materials Engineering Laboratory (LMGM); Badji-Mokhtar University of Annaba; P.O. Box 12 23000 Algeria
3. Cercle d'Etude des Métaux; Ecole Nationale Supérieure des Mines; Saint-Étienne Cedex 2 42023 France