| 摘要 |
<p>The present invention relates to an aluminium alloy having an aluminium-copper-magnesium system as well as to an article made thereof. This aluminium alloy is characterised in that it exhibits improved acoustic fatigue characteristics as well as high mechanical properties. The alloy of the present invention has the following chemical composition: from 3.8 to 4.5 wt % of copper; from 1.2 to 1.6 wt % of magnesium; from 0.4 to 0.8 wt % of manganese; from 0.01 to 0.07 wt % of titanium; from 0.01 to 0.05 wt % of nickel; from 2.7 x 10-5 to 5.0 x 10-5 wt % of oxygen; the balance consisting of aluminium. This invention can essentially be used in aviation techniques in areas submitted to acoustic stress the articles made of such an alloy have a high structural strength, a high reliability and an extended lifetime.</p> |
