Metal treatment – Stock – Age or precipitation hardened or strengthened
Patent
1993-11-19
1996-12-03
Simmons, David A.
Metal treatment
Stock
Age or precipitation hardened or strengthened
148418, C22C 2108
Patent
active
055804020
ABSTRACT:
Disclosed is an aluminum alloy sheet having a chemical composition of an Si-containing Al--Mg--CU alloy. The aluminum alloy sheet exhibits a streak-shaped modulated structure at a diffraction grating points of an Al--Cu--Mg--system compound in the electron beam diffraction grating image. The above mentioned streak can be generated efficiently when the alloy essentially consists of 1.5 to 3.5% by weight of Mg, 0.3 to 1.0% by weight of Cu, 0.05 to 0.6% by weight of Si, and the balance of Al and inevitable impurities, and the ratio of Mg/Cu is in the range of 2 to 7. The alloy contains 0.01-0.50% of at least one element selected from the group consisting of Sn, Cd, and In.
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Fujita Takeshi
Hasegawa Kohei
Mitao Shinji
Niikura Masakazu
Suga Masataka
NKK Corporation
Phipps Margery S.
Simmons David A.
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