METHODS OF PRODUCING 2XXX ALUMINUM ALLOYS
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United States of America Patent
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Issued Date -
May 30, 2024
app pub date -
Feb 7, 2024
filing date -
Aug 24, 2021
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
Methods of making new 2xxx aluminum alloy sheet products are disclosed. In one approach, a method comprises artificially aging a 2xxx aluminum alloy in at least two-steps. In one embodiment, the first aging step comprises first aging a 2xxx aluminum alloy at a first temperature of from 300° F. to 450ºF and for a first aging time of from 4 to 120 hours, and second aging the 2xxx aluminum alloy at a second temperature for a second aging time of from 30 minutes to 120 hours, wherein the second temperature is from 20° F. to 150° F. lower than the first temperature. The new two-step artificial aging step may facilitate an improved combination of properties, such as an improved combination of two or more of strength, ductility, fracture toughness, and corrosion resistance.
First Claim
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