Methods for forming dispersion-strengthened aluminum alloys

摘要

In accordance with an exemplary embodiment, a method of forming a dispersion-strengthened aluminum alloy metal includes the steps of providing a dispersion-strengthened aluminum alloy composition in a powdered form, directing a low energy density laser beam at a portion of the powdered alloy composition, and withdrawing the laser beam from the portion of the powdered alloy composition. Subsequent to withdrawal of the laser beam, the portion of the powdered alloy composition cools at a rate greater than or equal to about 106° C. per second, thereby forming the dispersion-strengthened aluminum alloy metal.

主权项

1. A method of forming a dispersion-strengthened aluminum alloy metal comprising the steps of:
providing, in a powdered form, an aluminum alloy composition that is capable of achieving a dispersion-strengthened microstructure, wherein providing the aluminum alloy composition comprises providing a composition of the following formula: AlbalFeaSibXc, wherein X is at least one element selected from the group consisting of Mn, V, Cr, Mo, W, Nb, and Ta; “a” ranges from 2.0 to 7.5 at %; “b” ranges from 0.5 to 3.0 at %; “c” ranges from 0.05 to 3.5 at %, and the balance is aluminum plus incidental impurities, with the proviso that the ratio [Fe+X]:Si is within the range from about 2.0:1 to 5.0:1; directing a low energy density laser beam at a portion of the alloy composition; withdrawing the laser beam from the portion of the powdered alloy composition; and cooling the portion of the powdered alloy composition at a rate greater than or equal to about 106° C. per second, thereby forming the dispersion-strengthened aluminum alloy metal.