HIGH DAMAGE TOLERANT Al-Cu ALLOY

摘要

Disclosed is a high damage tolerant Al-Cu alloy rolled product of the AA2000 series having a high toughness and an improved fatigue crack growth resistance, including the following composition (in weight percent) Cu 3.8 - 4.7, Mg 1.0 -1.6, Zr 0.06 - 0.18, Cr < 0.15, Mn > 0 - 0.50, Fe <= 0.15, Si <= 0.15, the balance essentially aluminium and incidental elements and impurities, wherein the product comprises Mn-containing dispersoids and Zr-containing dispersoids. There is also disclosed a method for producing a rolled high damage tolerant AI-Cu alloy product having a high toughness and an improved fatigue crack growth resistance, and applications of that product as a structural member of an aircraft.