Aluminum alloys, and methods for producing the same
New aluminum alloys are disclosed and generally include 0.6-1.4 wt. % Si, 0.25-0.90 wt. % Mg, wherein the ratio of wt. % Si to wt. % Mg is from 1.05:1 to 5.0:1, 0.25-2.0 wt. % Cu, 0.10-3.5 wt. % Zn, 0.01-1.0 wt. % Fe, up to 0.8 wt. % Mn, up to 0.25 wt. % Cr, up to 0.20 wt. % Zr, up to 0.20 wt. % V, and up to 0.15 wt. % Ti, wherein the total of Fe+Mn+Cr+Zr+V+Ti is not greater than 2.0 wt. %, the balance being aluminum and impurities. The new aluminum alloys may include Q phase precipitates. In some embodiments, the solvus temperature of the Q phase precipitates is not greater than 950° F.
1. An aluminum alloy comprising:
0.6-1.4 wt. % Si;
0.25-0.90 wt. % Mg;
wherein the ratio of wt. % Si to wt. % Mg is from 1.05:1 to 5.0:1;
0.25-2.0 wt. % Cu;
0.10-3.5 wt. % Zn;
0.01-1.0 wt. % Fe;
up to 0.8 wt. % Mn;
up to 0.25 wt. % Cr;
up to 0.20 wt. % Zr;
up to 0.20 wt. % V;
up to 0.15 wt. % Ti;
wherein the total of Fe+Mn+Cr+Zr+V+Ti is not greater than 2.0 wt. %;
the balance being aluminum and impurities;
wherein the aluminum alloy includes Q phase precipitates; and
wherein the solvus temperature of the Q phase precipitates and any Mg 2 Si precipitates is not greater than 950° F.
2. The aluminum alloy of claim 1 , wherein the aluminum alloy includes at least 0.7 wt. % Si.
3. The aluminum alloy of claim 2 , wherein the aluminum alloy includes not greater than 1.3 wt. % Si.
4. The aluminum alloy of claim 1 , wherein the aluminum alloy includes at least 0.30 wt. % Mg, and wherein the ratio of wt. % Si to wt. % Mg is from 1.05:1 to 4.67:1.
5. The aluminum alloy of claim 4 , wherein the ratio of wt. % Si to wt. % Mg is at least 1.10:1.
6. The aluminum alloy of claim 5 , wherein the ratio of wt. % Si to wt. % Mg is not greater than 2.75:1, or not greater than 2.5:1.
7. The aluminum alloy of claim 1 , wherein the aluminum alloy includes at least 0.30 wt. % Cu.
8. The aluminum alloy of claim 7 , wherein the aluminum alloy includes not greater than 1.75 wt. % Cu.
9. The aluminum alloy of claim 1 , wherein the aluminum alloy includes at least 0.20 wt. % Zn.
10. The aluminum alloy of claim 9 , wherein the aluminum alloy includes not greater than 3.0 wt. % Zn.
11. The aluminum alloy of claim 1 , wherein the aluminum alloy includes from 0.10 to 0.30 wt. % Mn.
12. The aluminum alloy claim 11 , wherein the aluminum alloy includes not greater than 0.05 wt. % Zr and not greater than 0.05 wt. % V.
13. The aluminum alloy of claim 1 , wherein the aluminum alloy includes the Q phase precipitates and Mg 2 Si precipitates, and a volumetric ratio of Mg 2 Si precipitates to Q phase precipitates is not greater than 1.25:1 ((Mg 2 Si(vol.)):(Q phase (vol.)).