Metallurgical product and structure member for aircraft made of Al-Zn-Cu-Mg alloy
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United States of America Patent
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Issued Date -
Jul 14, 2005
app pub date -
Dec 16, 2004
filing date -
Dec 16, 2003
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a work-hardened product, and particularly a rolled, extruded and/or forged product made of an alloy with composition (% by weight): Zn 6.7-7.3% Cu 1.9-2.5% Mg 1.0-2.0% Zr 0.04-0.15% Fe .ltoreq.0.15 Si .ltoreq.0.15 other elements .ltoreq.0.05 each and .ltoreq.0.15 total, remainder aluminium and wherein Mg/Cu<1. The product is preferable treated by solution heat treatment, quenching, cold working and artificial aging. Cold working may be achieved by controlled tension and/or cold transformation, for example rolling or drawing. The product may be used, for example, as an aircraft structural member.
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