Aluminum alloy products and a method of preparation
The present invention relates to aluminum alloy products that can be riveted and possess excellent ductility and toughness properties. The present invention also relates to a method of producing the aluminum alloy products. In particular, these products have application in the automotive industry.
1. An aluminum alloy sheet, comprising Cu 0.40-0.80 wt. %, Fe 0-0.40 wt. %, Mg 0.40-0.8 wt. %, Mn 0-0.40 wt. %, Si 0.40-0.7 wt. %, Cr 0-0.2 wt. %, Zn 0-0.1 wt. % and Ti 0-0.20 wt. % with trace element impurities 0.10 wt. % maximum, and Al,
wherein the aluminum alloy sheet has a yield strength of at least 300 MPa and an r/t bendability ratio of 0.8 or less,
wherein the aluminum alloy sheet comprises a plurality of dispersoid particles having an average size from 0.008 μm 2 to 2 μm 2 , and
wherein a number of dispersoid particles per 200 μm 2 is greater than 500 particles.
2. The aluminum alloy sheet of claim 1 , comprising Cu 0.45-0.75 wt. %, Fe 0.1-0.35 wt. %, Mg 0.45-0.8 wt. %, Mn 0.1-0.35 wt. %, Si 0.45-0.65 wt. %, Cr 0.02-0.18 wt. %, Zn 0-0.1 wt. % and Ti 0.05-0.15 wt. % with trace element impurities 0.10 wt. % maximum, and Al.
3. The aluminum alloy sheet of claim 1 , comprising Cu 0.45-0.65 wt. %, Fe 0.1-0.3 wt. %, Mg 0.5-0.8 wt. %, Mn 0.15-0.35 wt. %, Si 0.45-0.65 wt. %, Cr 0.02-0.14 wt. %, Zn 0.0-0.1 wt. % and Ti 0.05-0.12 wt. % with trace element impurities 0.10 wt. % maximum, and Al.
4. The aluminum alloy sheet of claim 1 , comprising Cu 0.51-0.59 wt. %, Fe 0.22-0.26 wt. %, Mg 0.66-0.74 wt. %, Mn 0.18-0.22 wt. %, Si 0.57-0.63 wt. %, Cr 0.06-0.1 wt. %, Zn 0.0-0.1 wt. % and Ti 0-0.08 wt. % with trace element impurities 0.10 wt. % maximum, and Al.
5. The aluminum alloy sheet of claim 1 , comprising Cu 0.51-0.59 wt. %, Fe 0.22-0.26 wt. %, Mg 0.66-0.74 wt. %, Mn 0.18-0.22 wt. %, Si 0.55-0.6 wt. %, Cr 0.06-0.1 wt. %, Zn 0.0-0.1 wt. % and Ti 0-0.08 wt. % with trace element impurities 0.10 wt. % maximum, and Al.
6. The aluminum alloy sheet of claim 1 , having sufficient ductility or toughness to meet an r/t bendability of 0.4 or less.
7. An automotive body part comprising the aluminum alloy sheet of claim 1 .
8. The aluminum alloy sheet of claim 1 , wherein the number of dispersoid particles per 200 μm 2 is greater than 1000 particles.
9. The aluminum alloy sheet of claim 1 , wherein the aluminum alloy sheet comprises from 0 wt. % to 0.10 wt. % excess Si for forming Mg 2 Si.
10. An aluminum alloy sheet, comprising Cu 0.45-0.65 wt. %, Fe 0-0.40 wt. %, Mg 0.40-0.8 wt. %, Mn 0-0.40 wt. %, Si 0.40-0.7 wt. %, Cr 0-0.2 wt. %, Zn 0-0.1 wt. % and Ti 0-0.20 wt. % with trace element impurities 0.10 wt. % maximum, and Al,
wherein the aluminum alloy sheet has a yield strength of at least 300 MPa and an r/t bendability ratio of 0.8 or less,
wherein the aluminum alloy sheet comprises a plurality of dispersoid particles having an average size from 0.008 μm 2 to 2 μm 2 , and
wherein a number of dispersoid particles per 200 μm 2 is greater than 500 particles.
11. The aluminum alloy sheet of claim 10 , wherein the aluminum alloy sheet comprises from 0 wt. % to 0.10 wt. % excess Si for forming Mg 2 Si.