RESEARCHES CONCERNING THE INFLUENCE OF THE HOT PLASTIC DEFORMATION DEGREE ON THE MECHANICAL PROPERTIES OF THREE ALLOYS BELONGING TO THE AL-ZN SYSTEM, WITH DIFFERENT ZN CONTENTS

The present work emphasizes the influence of the chemical composition in the case of three alloys belonging to the Al-Zn system and having different Zn contents, as well as the influence of the degree of hot plastic deformation on the values of sonic mechanical properties(Rm, Rp0,2, A(5), Brinell hardness) studied. The three alloys of different chemical compositions are used in Aviation, mainly due to their low specific weight and to some good mechanical properties resulting after heat and/or thermomechanical processing. After their elaboration and sleb casting at S.C.Alro S.A. Slatina, the alloys were subject to homogenization treatment. After accomplishing homogenization, the samples of the three alloys underwent a process of hot plastic deformation. This work highlights the variation of mechanical properties according to the value of the hot plastic deformation degree in the case of the three alloys studied.