Aluminum-magnesium-lithium alloys, and methods for producing the same

Abstract

New aluminum-magnesium-lithium alloys, and methods for producing the same are disclosed. The alloys generally contain 2.0-3.9 wt. % Mg, 0.1-1.8 wt. % Li, up to 1.5 wt. % Cu, up to 2.0 wt. % Zn, up to 1.0 wt. % Ag, up to 1.5 wt. % Mn, up to 0.5 wt. % Si, up to 0.35 wt. % Fe, 0.05 to 0.50 wt. % of a grain structure control element, up to 0.10 wt. % Ti, 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.

1 - 27 . (canceled) 
     
     
         28 . An aluminum alloy consisting of:
 2.0-3.9 wt. % Mg;   0.1-1.8 wt. % Li;   0.4 to 2.0 wt. % Zn;   up to 1.5 wt. % Cu;   up to 1.0 wt. % Ag;   up to 1.5 wt. % Mn;   up to 0.5 wt. % Si;   up to 0.35 wt. % Fe;   optionally at least one secondary element selected from the group consisting of Zr, Sc, Cr, Mn, Hf, V, Ti, and rare earth elements, and in the following amounts:
 up to 0.20 wt. % Zr; 
 up to 0.30 wt. % Sc; 
 up to 0.50 wt. % Cr; 
 up to 1.0 wt. % Mn; 
 up to 0.25 wt. % each of any of Hf, V, and rare earth elements; 
 up to 0.10 wt. % Ti; 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.   
     
     
         29 . An aluminum alloy consisting of:
 2.5-3.9 wt. % Mg;   1.05-1.8 wt. % Li;   up to 1.5 wt. % Cu;   up to 2.0 wt. % Zn;   up to 1.0 wt. % Ag;   up to 1.5 wt. % Mn;   up to 0.5 wt. % Si;   up to 0.35 wt. % Fe;   optionally at least one secondary element selected from the group consisting of Zr, Sc, Cr, Mn, Hf, V, Ti, and rare earth elements, and in the following amounts:
 up to 0.20 wt. % Zr; 
 up to 0.30 wt. % Sc; 
 up to 0.50 wt. % Cr; 
 up to 1.0 wt. % Mn; 
 up to 0.25 wt. % each of any of Hf, V, and rare earth elements; 
 up to 0.10 wt. % Ti; 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.   
     
     
         30 . The aluminum alloy of  claim 28 , wherein the aluminum alloy includes from 2.25 wt. % to 3.9 wt. % Mg. 
     
     
         31 . The aluminum alloy of  claim 28 , wherein the aluminum alloy includes from 2.5 wt. % to 3.9 wt. % Mg. 
     
     
         32 . The aluminum alloy of  claim 28 , wherein the aluminum alloy includes from 2.5 wt. % to 3.5 wt. % Mg. 
     
     
         33 . The aluminum alloy of  claim 30 , wherein the aluminum alloy includes from 0.4 wt. % to 1.5 wt. % Li. 
     
     
         34 . The aluminum alloy of  claim 31 , wherein the aluminum alloy includes from 0.8 wt. % to 1.45 wt. % Li. 
     
     
         35 . The aluminum alloy of  claim 32 , wherein the aluminum alloy includes from 1.20 wt. % to 1.4 wt. % Li. 
     
     
         36 . The aluminum alloy of  claim 33 , wherein the aluminum alloy includes from 0.4 wt. % to 1.5 wt. % Zn. 
     
     
         37 . The aluminum alloy of  claim 34 , wherein the aluminum alloy includes from 0.5 wt. % to 1.0 wt. % Zn. 
     
     
         38 . The aluminum alloy of  claim 36 , wherein the aluminum alloy includes not greater than 1.0 wt. % Cu. 
     
     
         39 . The aluminum alloy of  claim 36 , wherein the aluminum alloy includes not greater than 0.9 wt. % Cu. 
     
     
         40 . The aluminum alloy of  claim 37 , Wherein the aluminum alloy includes not greater than 0.5 wt. % Cu. 
     
     
         41 . The aluminum alloy of  claim 40 , wherein the aluminum alloy includes at least 0.10 wt. % Cu. 
     
     
         42 . The aluminum alloy of  claim 29 , wherein the aluminum alloy includes from 2.5 wt. % to 3.5 wt. % Mg. 
     
     
         43 . The aluminum alloy of  claim 42 , wherein the aluminum alloy includes not greater than 1.5 wt. % Zn. 
     
     
         44 . The aluminum alloy of  claim 43 , wherein the aluminum alloy includes not greater than 1.0 wt. % Cu. 
     
     
         45 . The aluminum alloy of  claim 43 , wherein the aluminum alloy includes not greater than 0.9 wt. % Cu. 
     
     
         46 . The aluminum alloy of  claim 43 , wherein the aluminum alloy includes not greater than 0.5 wt. % Cu. 
     
     
         47 . The aluminum alloy of  claim 47 , wherein the aluminum alloy includes at least 0.10 wt. % Cu.