METHOD FOR REDUCING DAMAGE DURING SUPERPLASTIC DEFORMATION, IN PARTICULAR FOR ALUMINUM ALLOYS

摘要

The invention relates to a method for reducing damage during superplastic deformation. This method consists, at a given temperature and under microstructural and deformation rate conditions causing the behavior superplastic of the alloy considered, to apply successive partial deformations epsilon 0 for a time t separated by periods of rest epsilon = 0 for a time t '. The values of t and t 'are between 0.5 and 10 min and preferably between 1 and 3 min. / P P This method makes it possible to obtain good mechanical tensile or fatigue characteristics, without resorting to the use of superimposed isostatic pressure. / P