AL-ZN-MG-CU ALLOYS WELDED PRODUCTS WITH HIGH MECHANICAL PROPERTIES, AND AIRCRAFT STRUCTURAL ELEMENTS

摘要

The invention is constituted by a product rolled, extruded or forged alloy al - - - mg, cu, zn, characterized in that it contains (as a percent by weight): a) zn 8, 3 - 14, 0 or 0, 3 - 2, 0 mg 0, 5 - 4, 5 and preferably 0, 5 - 3, 6 zr 0, 03 - 0, 15, fe + si 0, 25 b) at least one element selected from the group composed of sc, hf, la, ti, this, nd, eu, gd, tb, dy, ho, er, y, yb, the content of each of said elements, if it is selected, being between 0, 02, and 0, 7%, c) the remainder aluminium and inevitable impurities, and in that it satisfies conditionsd) mg / cu 2, 4 etc.) (7, 9 - 0, 4) & zn (cu + mg) (6, 4 - 0, 4, zn), and preferably, 1 mg. 95 + 0, 5 (Cu - 2, 3) + 0, 16 (zn - 6) + 1, 9 (if - 0, 04). the products according to the invention can be used in particular for the manufacture of the stiffeners of the fuselage of civil aircraft.