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US 10,208,371 B2Granted
Aluminum alloys with high strength and cosmetic appeal
AssigneeApple Inc.
InventorsAbhijeet Misra, James A. Wright, Herng-Jeng Jou
Life of this patent
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Abstract
The disclosure provides aluminum alloys having varying ranges of alloying elements and properties. In some variations, the alloy can include 3.4 to 4.9 wt % Zn, 1.3 to 2.1 wt % Mg, no greater than 0.06 wt % Cu, no greater than 0.06 wt % Zr, 0.06 to 0.08 wt % Fe, no greater than 0.05 wt % Si, and the balance is aluminum and incidental impurities.
Claims19
An aluminum alloy comprising:
- 3.4 to 4.9 wt % Zn;
- 1.3 to 2.1 wt % Mg,
- no greater than 0.06 wt % Cu,
- no greater than 0.06 wt % Zr,
- 0.06 to 0.08 wt % Fe,
- no greater than 0.05 wt % Si, and
- the balance is aluminum and incidental impurities;
- and
- wherein the alloy has a wt % ratio of Zn to Mg from 2.5 to 3.5.
6 more elements
A method for producing an aluminum alloy, the method comprising:
- forming a melt that comprises an alloy comprising:
- 3.4 to 4.9 wt % Zn;
- 1.3 to 2.1 wt % Mg,
- no greater than 0.06 wt % Cu,
- no greater than 0.06 wt % Zr,
- 0.06 to 0.08 wt % Fe,
- no greater than 0.05 wt % Si, and
- the balance is aluminum and incidental impurities;
- cooling the melt to room temperature;
- homogenizing the cooled alloy by heating to a first elevated temperature;
- hot-working the homogenized alloy;
- solution treating the hot-worked alloy at a second elevated temperature;
- and
- aging the solution treated alloy at a third elevated temperature for a period of time.
11 more elements
An article comprising the alloy comprising:
- 3.4 to 4.9 wt % Zn;
- 1.3 to 2.1 wt % Mg,
- no greater than 0.06 wt % Cu,
- no greater than 0.06 wt % Zr,
- 0.06 to 0.08 wt % Fe,
- no greater than 0.05 wt % Si, and
- the balance is aluminum and incidental impurities.
4 more elements
Dependencies are inferred from the claim text.