ALUMINUM ALLOY HAVING VISIBLE GRAINS AND ALUMINUM ALLOY COLORED BY DOUBLE ANODIZATION
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United States of America Patent
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Issued Date -
Feb 28, 2019
app pub date -
Feb 13, 2018
filing date -
Aug 29, 2017
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Abstract
Embodiments relate to a type of aluminum alloy with grains visible to naked eyes. The aluminum alloy may have an average grain size of at least 100 μm. The aluminum alloy can be produced by a process such as casting, extrusion, solutionizing, aging, and etching. The solutionizing causes recrystallization of aluminum and causes grains of the aluminum to grow. Compared with the solutionizing, the aging is performed at lower temperature but enhances strength of the aluminum alloy. The etching makes grain boundaries of the aluminum alloy more prominent, rendering the grains of the aluminum alloy visible to a naked human eye.
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