US2012103476A1PendingUtilityA1

5xxx aluminum alloys, and methods for producing the same

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Assignee: NEWMAN JOHN MPriority: Oct 29, 2010Filed: Oct 28, 2011Published: May 3, 2012
Est. expiryOct 29, 2030(~4.3 yrs left)· nominal 20-yr term from priority
Inventors:John M. NewmanFrancine S. BovardRalph R. Sawtell
C22C 21/08C22F 1/047C22C 21/00C22C 21/06C22F 1/04
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Claims

Abstract

Improved 5xxx aluminum alloys having an improved combination of properties are disclosed. The new 5xxx aluminum alloys generally contain 0.50 to 3.25 wt. % Mg, 0.05 to 0.20 wt. % Sc, 0.05 to 0.20 wt. % Zr, up to 0.50 wt. % in total of Cu and Ag, less than 0.10 wt. % Mn, up to 0.30 wt. % in total of Cr, V and Ti, up to 0.50 wt. % in total of Ni and Co, up to 0.25 wt. % Fe, up to 0.25 wt. % Si, up to 0.50 wt. % Zn, and up to 0.10 wt. % of any other element, with the total of these other elements not exceeding 0.35 wt. %, the balance being aluminum. The new 5xxx aluminum alloys may be used in high strength electrical conductor products, among others.

Claims

exact text as granted — not AI-modified
1 . An aluminum alloy comprising:
 0.50 to 3.25 wt. % Mg;   0.05 to 0.20 wt. % Sc;   0.05 to 0.20 wt. % Zr;   up to 0.50 wt. % in total of Cu and Ag;   less than 0.10 wt. % Mn;   up to 0.30 wt. % in total of Cr, V and Ti;   up to 0.50 wt. % in total of Ni and Co;   up to 0.25 wt. % Fe;   up to 0.25 wt. % Si;   up to 0.50 wt. % Zn;   up to 0.10 wt. % of any other element, with the total of these other elements not exceeding 0.35 wt. %; and   the balance being aluminum.   
     
     
         2 . The aluminum alloy of  claim 1 , comprising 0.07 to 0.18 wt. % Sc and 0.07 to 0.18 wt. % Zr. 
     
     
         3 . The aluminum alloy of  claim 1 , comprising 0.05 to 0.50 wt. % in total of Cu and Ag. 
     
     
         4 . The aluminum alloy of  claim 3 , comprising 0.20 to 0.40 wt. % in total of Cu and Ag. 
     
     
         5 . The aluminum alloy of  claim 4 , wherein the alloy excludes Ag, except as an other element. 
     
     
         6 . The aluminum alloy of  claim 4 , wherein the alloy excludes Cu, except as an other element. 
     
     
         7 . The aluminum alloy of  claim 1 , wherein the alloy includes not greater than 0.03 wt. % Mn. 
     
     
         8 . The aluminum alloy of  claim 7 , wherein the alloy includes not greater than 0.01 wt. % Mn. 
     
     
         9 . The aluminum alloy of  claim 1 , wherein the alloy includes not greater than 0.03 wt. % in total of Cr, V and Ti. 
     
     
         10 . The aluminum alloy of  claim 9 , wherein the alloy includes at least 0.005 wt. % Ti. 
     
     
         11 . The aluminum alloy of  claim 1 , wherein the alloy includes not greater than 0.10 wt. % Fe and 0.05 wt. % Si. 
     
     
         12 . The aluminum alloy of  claim 11 , wherein the alloy includes not greater than 0.25 wt. % Zn. 
     
     
         13 . The aluminum alloy of  claim 1 , wherein the alloy includes up to 0.05 wt. % each of the other element, with the total of these other elements not exceeding 0.15 wt. %. 
     
     
         14 . The aluminum alloy of  claim 1 , wherein the aluminum alloy realizes an electrical conductivity (EC) of at least 35% IACS and a longitudinal tensile yield strength (TYS-L) of at least 270 MPa, and wherein the combination of EC to TYS-L satisfies the following expression: % IACS≧−0.195*(TYS-L)+96, wherein the EC and TYS-L properties are tested after the electrical conductor has been annealed at 250° F. for 6 hours. 
     
     
         15 . The aluminum alloy of  claim 14 , wherein the combination of EC to TYS-L satisfies the following expression: % IACS≧−0.195*(TYS-L)+102. 
     
     
         16 . The aluminum alloy of  claim 15 , wherein the aluminum alloy realizes a longitudinal tensile yield strength (TYS-L) of at least 290 MPa. 
     
     
         17 . The aluminum alloy of  claim 16 , wherein the aluminum alloy achieves an electrical conductivity (EC) of at least 40.0% IACS. 
     
     
         18 . The aluminum alloy of  claim 1 , wherein a thermally exposed version of the aluminum alloy retains at least 80% of its longitudinal tensile yield strength relative to the longitudinal tensile yield strength of a non-thermally exposed version of the aluminum alloy. 
     
     
         19 . The aluminum alloy of  claim 18 , wherein the aluminum alloy realizes a mass loss of not greater than 10 mg/cm 2  when tested in accordance with ASTM G67. 
     
     
         20 . An electrical conductor made the aluminum alloy of  claim 1 .

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