Aluminum alloy products and methods for producing same
View Patent ↗An aluminum alloy product and method for producing the aluminum alloy product that, in some embodiments, includes an aluminum alloy strip having at least 0.8 wt. % manganese, at least 0.6 wt % iron, or at least 0.8 wt. % manganese and at least 0.6 wt % iron. A near surface of the aluminum alloy strip, in some embodiments, is substantially free of large particles having an equivalent diameter of at least 50 micrometers and includes small particles. Each small particle, in some embodiments, has a particular equivalent diameter that is less than 3 micrometers, and a quantity per unit area of the small particles having the particular equivalent diameter is at least 0.01 particles per square micrometer at the near surface of the aluminum alloy strip.
1. A product comprising:
an aluminum alloy strip;
wherein the aluminum alloy strip includes:
(i) from 0.8 to 2.2 wt. % Mn; and
(ii) from 0.6 to 2.0 wt. % Fe; and
(iii) wherein the manganese and iron are contained within the aluminum alloy strip in an amount sufficient to achieve a hypereutectic composition;
wherein the aluminum alloy strip includes a maximum of 1.5 wt % silicon;
wherein a near surface of the aluminum alloy strip comprises particles, wherein at least 90% of the particles are small particles;
wherein each small particle has a particular equivalent diameter;
wherein the particular equivalent diameter is less than 3 micrometers;
wherein a quantity per unit area of the small particles having the particular equivalent diameter is at least 0.01 particles per square micrometer at the near surface of the aluminum alloy strip; and
wherein a central portion of the aluminum alloy strip comprises a plurality of dendrites having a size of 20 microns to 50 microns.
2. The product of claim 1 , wherein an oxygen content of the aluminum alloy strip is 0.1 weight percent or less.
3. The product of claim 2 , wherein the oxygen content of the aluminum alloy strip is 0.01 weight percent or less.
4. The product of claim 1 , wherein the particular equivalent diameter is at least 0.3 micrometers.
5. The product of claim 1 , wherein the particular equivalent diameter ranges from 0.3 micrometers to 0.5 micrometers.
6. The product of claim 1 , wherein the particular equivalent diameter is 0.5 micrometers and wherein the quantity per unit area of the small particles having the particular equivalent diameter is at least 0.03 particles per square micrometer at the near surface of the aluminum alloy strip.
7. The product of claim 1 , wherein the product is selected from the group consisting of can body stock and can end stock.
8. The product of claim 1 , wherein at least 98% of the particles of the near surface of the aluminum alloy strip are small particles.
9. The product of claim 1 , wherein the particular equivalent diameter of the small particles is less than 1 micrometer, and wherein a volume fraction of the small particles having the particular equivalent diameter is at least 0.2 percent at the near surface of the aluminum alloy strip.
10. The product of claim 1 , wherein the volume fraction of the small particles having the particular equivalent diameter is at least 0.65 percent, and wherein the particular equivalent diameter ranges from 0.5 micrometers to 0.85 micrometers.
11. The product of claim 1 , wherein the aluminum alloy strip comprises up to 3.0 wt. % Mg, up to 1.0 wt. % Cu and up to 1.5 wt. % Zn.