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Static softening of 63/37 alpha -brass cold and hot worked by tensile test.

par Diltoer, Jacqueline ;Othmezouri, Jacqueline;Charlier, Jacques
Référence Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, 78, 12, page (856-861)
Publication Publié, 1987-12

Article révisé par les pairs

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Résumé :

Static softening heat treatments after cold and hot working by tension have been performed on 63/37 alpha -brass at 0. 62 to 0. 66 and 0. 68 T//M; the hot deformation temperature lying between 0. 65 and 0. 70 T//M, the strain rate varying between 1. 2 multiplied by 10** minus **4 and 1. 2 multiplied by 10** minus **3 s** minus **1. The static softening treatment of hot worked samples was applied to samples unloaded after deformation in the range of either dynamic recovery or dynamic recrystallization. For the cold worked samples, the stress level before unloading is chosen to be the same as the yield stress at room temperature of samples previously dynamically recovered at high temperature. Curves giving softening levels versus time at different temperatures have been established for the mentioned initial states by mechanical testing. In any case the activation energy of static recrystallization is about 190 kJ/mol.