IMPROVED AL-AN-MG-CU ALLOY AS REGARDS ITS COMBINED PROPERTIES OF DAMAGE TOLERANCE AND MECHANICAL STRENGTH

摘要

Aluminum alloy essentially composed, in weight percentages, of approximately 6.5 to 9.5% of zinc (Zn), of approximately 1.2 to 2.2% of magnesium (Mg), of approximately 1 , 0 to 1.9% of copper (Cu), preferably (0.9Mg - 0.6) ≤ Cu ≤ (0.9Mg + 0.05), approximately 0 to 0.5% of zirconia (Zr), about 0 to 0.7 of scandium (Sc), about 0 to 0.4% of chromium (Cr), about 0 to 0.03% of hafnium (Hf), about 0 to 0.4% of titanium (Ti ), about 0 to 0.8% manganese (Mn), the rest being composed of aluminum (Al) and other occasional elements. The invention also relates to a method for manufacturing such an alloy.