Dispersion hardenable Al-Ni-Mn casting alloys for automotive and aerospace structural components
First Claim
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1. An aluminum alloy wherein Ni is the most abundant alloying ingredient.
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Abstract
An aluminum casting alloy includes at least about 0.5 wt % Ni and 1-3 wt % Mn. It further includes zirconium or scandium for precipitation hardening during T5 heat treatment.
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Citations
35 Claims
- 1. An aluminum alloy wherein Ni is the most abundant alloying ingredient.
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5. An aluminum casting alloy comprising:
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about 0.5-6 wt % Ni, about 1-3 wt % Mn, and at least one element for precipitation hardening during artificial ageing. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An aluminum alloy casting comprising:
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about 0.5-6 wt % Ni, about 1-3 wt % Mn, and at least one element for precipitation hardening, a microstructure of the casting comprising aluminum dendrites in a matrix comprised of a eutectic of aluminum versus an AlNiMn intermetallic compound, and a relatively fine dispersion comprised of the at least one element for precipitation hardening, at least some of the dispersion disposed in the aluminum dendrites. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of making an aluminum alloy casting, the method comprising:
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preparing a molten aluminum alloy comprising 0.5-6 wt % Ni, 1-3 wt % Mn, Zr in a range from about 0.3-1 wt %;
heating the molten aluminum alloy to a temperature of at least above the liquidus temperature;
casting the molten aluminum alloy in a mold;
artificially ageing the casting. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification