Abstract: The present disclosure concerns composite material having improved strength at elevated temperatures. The composite material comprises a matrix of an aluminum alloy (comprising, in weight percent, Si 0.05-0.30, Fe 0.04-0.6, Mn 0.80-1.50, Mg 0.80-1.50 and the balance being aluminum and unavoidable impurities) as well as particles of a filler material dispersed within the matrix. The matrix can optionally comprise Cu and/or Mo. In some embodiments, the composite material comprises, as a filler material, B4C as well as an additive selected from the group consisting of Ti, Cr, V, Nb, Zr, Sr, Sc and any combination thereof. The present disclosure also provides processes for making such composite materials.

Abstract: An aluminum alloy for making an extruded and brazed aluminum product, the aluminum alloy comprising, in weight percent, 0.10-0.20 Zn to improve corrosion resistance, 0.9-1.2 Mn, 0.03-0.10 Mg, the sum of Mg and Mn being at least 0.99 to maintain or improve strength, 0.15 to 0.30 Fe to control grain size, up to 0.15 Si, up to 0.03 Cu, up to 0.04 Ti, the balance being aluminum and unavoidable impurities. The alloy may be in the form of extrusion ingots or extruded and brazed aluminum products. A process for making an extruded and brazed aluminum product from the alloy involves homogenizing, extruding, optionally working, and brazing the alloy to form the product.

Abstract: An aluminum alloy includes Si and Mg in amounts (wt. %) within a quadrilateral defined by the following coordinates on an Mg/Si plot: I: 1.15 Si, 0.70 Mg, II: 0.95 Si, 0.55 Mg; III: 0.75 Si, 0.65 Mg; and IV: 0.95 Si, 0.85 Mg. The alloy also includes, in weight percent: Mn 0.40-0.80 Fe 0.25 max Cr 0.05-0.18 Cu 0.30-0.90 Ti 0.05 max Zr 0.03 max Zn 0.03 max B 0.01 max with the remainder of the alloy being aluminum and unavoidable impurities in amounts of up to 0.05 wt. % each and 0.15 wt. % total.

Abstract: An aluminum alloy composition includes, in weight percent: less than or equal to 0.70 iron; less than or equal to 0.30 silicon; and less than or equal to 0.30 copper, with the balance being aluminum and other elements, with the other elements being present at up to 0.05 weight percent each and up to 0.15 weight percent total. The alloy is homogenized at a temperature of 520° C. to 570° C. for 2-10 hours. The volume phase fraction of a-AlFeSi phase present in the homogenized aluminum alloy product may be at least 10%.

Abstract: An aluminum alloy includes, in weight percent, 0.50-1.30% Si, 0.2-0.60% Fe, 0.15% max Cu, 0.5-0.90% Mn, 0.6-1.0% Mg, and 0.20% max Cr, the balance being aluminum and unavoidable impurities. The alloy may include excess Mg over the amount that can be occupied by Mg—Si precipitates. The alloy may be utilized as a matrix material for a composite that includes a filler material dispersed in the matrix material. One such composite may include boron carbide as a filler material, and the resultant composite may be used for neutron shielding applications.

Abstract: An aluminum alloy composition includes, in weight percent: 0.7-1.10 manganese; 0.05-0.25 iron; 0.21-0.30 silicon; 0.005-0.020 nickel; 0.10-0.20 titanium; 0.014 max copper; and 0.05 max zinc, with the balance being aluminum and unavoidable impurities. The alloy may tolerate higher nickel contents than existing alloys, while providing increased corrosion resistance, as well as similar extrudability, strength, and performance. Billets of the alloy may be homogenized at 590-640° C. and controlled cooled at less than 250° C. per hour. The homogenized billet may be extruded into a product, such as an aluminum alloy heat exchanger tube.

Abstract: An aluminum alloy composition includes, in weight percent: 0.5-0.7 manganese; 0.05-0.15 iron; 0.3-0.5 silicon; 0.020 max nickel; 0.05-0.15 titanium; 0.01 max copper; and 0.10 max zinc, with the balance being aluminum and unavoidable impurities. The alloy may also have a combined amount of manganese and silicon of at least 0.8 wt. % and/or a Mn/Si ratio of 2.25 or less. The alloy may tolerate higher nickel contents than existing alloys, while providing increased corrosion resistance, as well as similar extrudability, strength, and performance. Billets or other intermediate products formed of the alloy may be homogenized at 500-595° C. and controlled cooled at 400° C. per hour or less. The homogenized billet may be extruded into an extruded product, such as an aluminum alloy heat exchanger tube.

Abstract: An aluminum alloy for making an extruded and brazed aluminum product, the aluminum alloy comprising, in weight percent, 0.10-0.20 Zn to improve corrosion resistance, 0.9-1.2 Mn, 0.03-0.10 Mg, the sum of Mg and Mn being at least 0.99 to maintain or improve strength, 0.15 to 0.30 Fe to control grain size, up to 0.15 Si, up to 0.03 Cu, up to 0.04 Ti, the balance being aluminum and unavoidable impurities. The alloy may be in the form of extrusion ingots or extruded and brazed aluminum products. A process for making an extruded and brazed aluminum product from the alloy involves homogenizing, extruding, optionally working, and brazing the alloy to form the product.

Abstract: The present disclosure concerns composite material having improved strength at elevated temperatures. The composite material comprises a matrix of an aluminum alloy (comprising, in weight percent, Si 0.05-0.30, Fe 0.04-0.6, Mn 0.80-1.50, Mg 0.80-1.50 and the balance being aluminum and unavoidable impurities) as well as particles of a filler material dispersed within the matrix. The matrix can optionally comprise Cu and/or Mo. In some embodiments, the composite material comprises, as a filler material, B4C as well as an additive selected from the group consisting of Ti, Cr, V, Nb, Zr, Sr, Sc and any combination thereof. The present disclosure also provides processes for making such composite materials.

Abstract: An aluminum alloy composition includes, in weight percent: 0.5-0.7 manganese; 0.05-0.15 iron; 0.3-0.5 silicon; 0.020 max nickel; 0.05-0.15 titanium; 0.01 max copper; and 0.10 max zinc, with the balance being aluminum and unavoidable impurities. The alloy may also have a combined amount of manganese and silicon of at least 0.8 wt. % and/or a Mn/Si ratio of 2.25 or less. The alloy may tolerate higher nickel contents than existing alloys, while providing increased corrosion resistance, as well as similar extrudability, strength, and performance. Billets or other intermediate products formed of the alloy may be homogenized at 500-595° C. and controlled cooled at 400° C. per hour or less. The homogenized billet may be extruded into an extruded product, such as an aluminum alloy heat exchanger tube.

Abstract: An aluminum alloy composition includes, in weight percent: less than or equal to 0.70 iron; less than or equal to 0.30 silicon; and less than or equal to 0.30 copper, with the balance being aluminum and other elements, with the other elements being present at up to 0.05 weight percent each and up to 0.15 weight percent total. The alloy is homogenized at a temperature of 520° C. to 570° C. for 2-10 hours. The volume phase fraction of ?-AlFeSi phase present in the homogenized aluminum alloy product may be at least 10%.

Abstract: An aluminum alloy includes, in weight percent, 0.70-0.85 Si, 0.14-0.25 Fe, 0.25-0.35 Cu, 0.02-0.08 Mn, 0.75-0.90 Mg, 0.04-0.08 Cr, 0.05 max Zn, and 0.04 max Ti, the balance being aluminum and unavoidable impurities. The minimum Mn content may be 0.03 wt. %, and/or the maximum Mn content may be 0.06 wt. %, in various configurations. The alloy may be suitable for extruding, and may be formed into an extruded alloy product.

Abstract: An aluminum alloy includes, in weight percent, 0.50-1.30% Si, 0.2-0.60% Fe, 0.15% max Cu, 0.5-0.90% Mn, 0.6-1.0% Mg, and 0.20% max Cr, the balance being aluminum and unavoidable impurities. The alloy may include excess Mg over the amount that can be occupied by Mg—Si precipitates. The alloy may be utilized as a matrix material for a composite that includes a filler material dispersed in the matrix material. One such composite may include boron carbide as a filler material, and the resultant composite may be used for neutron shielding applications.

Abstract: An aluminum alloy includes, in weight percent, 0.50-1.30% Si, 0.2-0.60% Fe, 0.15% max Cu, 0.5-0.90% Mn, 0.6-1.0% Mg, and 0.20% max Cr, the balance being aluminum and unavoidable impurities. The alloy may include excess Mg over the amount that can be occupied by Mg—Si precipitates. The alloy may be utilized as a matrix material for a composite that includes a filler material dispersed in the matrix material. One such composite may include boron carbide as a filler material, and the resultant composite may be used for neutron shielding applications.

Abstract: An aluminum alloy composition includes, in weight percent: 0.7-1.10 manganese; 0.05-0.25 iron; 0.21-0.30 silicon; 0.005-0.020 nickel; 0.10-0.20 titanium; 0.014 max copper; and 0.05 max zinc, with the balance being aluminum and unavoidable impurities. The alloy may tolerate higher nickel contents than existing alloys, while providing increased corrosion resistance, as well as similar extrudability, strength, and performance. Billets of the alloy may be homogenized at 590-640° C. and controlled cooled at less than 250° C. per hour. The homogenized billet may be extruded into a product, such as an aluminum alloy heat exchanger tube.

Abstract: A novel extrudable aluminum based alloy is described consisting essentially of 0.60-0.84% magnesium, 0.45-0.58% silicon, 0.15-0.40% copper, 0.04-0.35% chromium, or 0.20-0.80% manganese, less than 0.25% iron, where Si>=(Mg/1.73+(Mn+Cr+Fe)/3−0.04), and the balance essentially aluminum. In the alloy of the present invention, the magnesium content has been reduced to the minimum possible for mechanical properties. In this way, the magnesium silicide content of the alloy has been reduced, providing a very beneficial effect on extrudability.