US2020181746A1PendingUtilityA1

Aluminum alloys with high strength and cosmetic appeal

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Assignee: APPLE INCPriority: Sep 30, 2013Filed: Feb 13, 2020Published: Jun 11, 2020
Est. expirySep 30, 2033(~7.2 yrs left)· nominal 20-yr term from priority
Inventors:Brian M. GableJames A. WrightCharles J. KuehmannBrian P. DemersChune-Ching YoungChun-Hsien Chiang
C22C 21/10C22F 1/053C22C 1/026
67
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Claims

Abstract

The disclosure provides an aluminum alloy including having varying ranges of alloying elements. In various aspects, the alloy has a wt % ratio of Zn to Mg ranging from 4:1 to 7:1. The disclosure further includes methods for producing an aluminum alloy and articles comprising the aluminum alloy.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . An aluminum alloy comprising:
 4.5 to 8.0 wt % Zn;   0.9 to 2.0 wt % Mg;   0.01 to 0.3 wt % Cu;   0.04 to 0.25 wt % Fe;   0 to 0.05 wt % Zr; and   the balance being aluminum and incidental impurities.   
     
     
         2 . The aluminum alloy according to  claim 1 , wherein the alloy has a wt % ratio of Zn to Mg from 4:1 to 7:1. 
     
     
         3 . The aluminum alloy according to  claim 1 , comprising 0 to 0.04 wt % Zr. 
     
     
         4 . The aluminum alloy according to  claim 1 , comprising 0 to 0.10 wt % Si. 
     
     
         5 . The aluminum alloy according to  claim 1 , wherein the alloy has 3-6 vol % MgZn 2 . 
     
     
         6 . The aluminum alloy according to  claim 1 , wherein the alloy has an average grain aspect ratio of 1.0 to 1.3. 
     
     
         7 . The aluminum alloy according to  claim 1 , wherein the alloy has a thermal conductivity greater than 130 W/mk. 
     
     
         8 . The aluminum alloy according to  claim 1 , wherein the alloy has a yield strength of at least 280 MPa. 
     
     
         9 . An aluminum alloy comprising:
 6.0 to 7.0 wt % Zn;   1.0 to 1.75 wt % Mg;   0.1 to 0.3 wt % Cu;   0.10 to 0.20 wt % Fe;   0 to 0.05 wt % Zr; and   the balance being aluminum and incidental impurities.   
     
     
         10 . The aluminum alloy according to  claim 1 , wherein the alloy has a wt % ratio of Zn to Mg from 4:1 to 7:1. 
     
     
         11 . The aluminum alloy according to  claim 1 , wherein the alloy has 3-6 vol % MgZn 2 . 
     
     
         12 . The aluminum alloy according to  claim 1 , wherein the alloy has an average grain aspect ratio of 1.0 to 1.3. 
     
     
         13 . The aluminum alloy according to  claim 1 , wherein the alloy has a thermal conductivity greater than 130 W/mk. 
     
     
         14 . The aluminum alloy according to  claim 1 , wherein the alloy has a yield strength of at least 280 MPa. 
     
     
         15 . A housing for an electronic device comprising the alloy comprising:
 4.5 to 8.0 wt % Zn;   0.9 to 2.0 wt % Mg;   0.01 to 0.30 wt % Cu;   0.04 to 0.25 wt % Fe;   0 to 0.05 wt % Zr; and   the balance being aluminum and incidental impurities.   
     
     
         16 . The housing according to  claim 15 , wherein the alloy having a wt % ratio of Zn to Mg from 4:1 to 7:1. 
     
     
         17 . The housing according to  claim 15 , wherein the alloy has 3-6 vol % MgZn 2 . 
     
     
         18 . The housing according to  claim 15 , wherein the alloy has an average grain aspect ratio of 1.0 to 1.3. 
     
     
         19 . The housing according to  claim 15 , wherein the alloy has a thermal conductivity greater than 130 W/mk. 
     
     
         20 . The housing according to  claim 15 , wherein the alloy has a yield strength of at least 280 MPa.

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