Products made of Al-Zn-Mg-Cu alloys with an improved compromise between static mechanical characteristics and damage tolerance
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United States of America Patent
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Nov 18, 2008
Grant Date -
Mar 17, 2005
app pub date -
Jun 23, 2004
filing date -
Jun 24, 2003
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Abstract
The present invention relates to an extruded, rolled and/or forged product made of an aluminum alloy. Alloys of the present invention may comprise (by mass): Zn 6.7-7.5% Cu 2.0-2.8% Mg 1.6-2.2% at least one element selected from the group composed of: i Zr 0.08-0.20% Cr 0.05-0.25% Sc 0.01-0.50% Hf 0.05-0.20% and V 0.02-0.20% Fe+Si<0.20% other elements .ltoreq.0.05 each and .ltoreq.0.15 total, balance aluminum. Products of the present invention in some embodiments have an improved compromise between static mechanical strength and damage tolerance.
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