Loading patent…
AssigneeRockwell International Corporation
InventorsNeil E. Paton, C. Howard Hamilton
Estimating the term…
A method is provided for imparting a fine grain structure to aluminum alloys which have precipitating constituents. The alloy is first heated to a solid solution temperature to dissolve the precipitating constituents in the alloy. The alloy is then cooled, preferably by water quenching, to below the solution temperature and then overaged to form precipitates by heating it above the precipitation hardening temperature for the alloy but below its solution treating temperature. Strain energy is introduced into the alloy by plastically deforming it at or below the overaging temperature used. The alloy is then subsequently held at a recrystallization temperature so that the new grains are nucleated by the overaged precipitates and the development of these grains results in a fine grain structure.
A method of imparting a fine grain structure to an aluminum alloy having a precipitating constituent, comprising:
A method of imparting a fine grain structure to an aluminum alloy having a precipitating constituent, comprising:
A method of imparting a fine grain structure to an aluminum alloy selected from the group consisting of aluminum alloy numbers 2014, 2018, 2020, 2024, and 4032, comprising:
A method of imparting a fine grain structure to an aluminum alloy selected from the group consisting of aluminum alloy numbers 2219, 6053, 6061, 6062, 6063, 6066, and 6151, comprising:
A method of imparting a fine grain structure to an aluminum alloy selected from the group consisting of aluminum alloy numbers 7049, 7050, 7075, 7076, 7079, and 7178, comprising:
A method of imparting a fine grain structure to an aluminum alloy having a precipitating constituent, comprising:
Dependencies are inferred from the claim text.