Method for production of performance enhanced metallic materials
AssigneeThe Boeing Company
InventorAli Yousefiani
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Abstract
A metallic material manufactured by a method including steps of (1) subjecting a semifinished metallic billet having at least one of a nanocrystalline microstructure and an ultrafine-grained microstructure to a rotary incremental forming process to form an intermediate wrought metallic billet and (2) subjecting the intermediate wrought metallic billet to a high rate forming process, wherein the high rate forming process includes a high rate forming process average equivalent strain rate, the high rate forming process average equivalent strain rate being at least about 0.1 s−1.
Claims20
An annealed wrought metallic material comprising aluminum or aluminum alloy, the annealed wrought metallic material being manufactured by a method comprising:
- subjecting a semifinished metallic billet comprising at least one of a nanocrystalline microstructure and an ultrafine-grained microstructure to a rotary incremental forming process to form an intermediate wrought metallic billet, said rotary incremental forming process employing at least one of a rotary incremental forming process temperature, a rotary incremental forming process average equivalent strain rate, and a rotary incremental forming process reduction ratio;
- subjecting said intermediate wrought metallic billet to a high rate forming process to form a wrought metallic material, wherein said high rate forming process comprises a high rate forming process average equivalent strain rate, said high rate forming process average equivalent strain rate being at least about 0.1 s−1;
- and
- annealing the wrought metallic material, thereby yielding the annealed wrought aluminum material having an ultimate tensile strength of at least about 60 ksi, wherein the annealed wrought aluminum material has a yield strength that is at least 50 percent greater than the yield strength of an annealed wrought micrograined material having the same composition as the annealed wrought aluminum material that is not subjected to any pre-anneal thermal or mechanical processes.
An annealed 6061 aluminum alloy composition comprised of a degassed metallic material powder comprising aluminum, magnesium, silicon, copper, and chromium, wherein the annealed 6061 aluminum alloy composition has an ultimate tensile strength of at least 30 ksi, and wherein the annealed 6061 aluminum alloy composition has a yield strength that is at least 50 percent higher than the yield strength of an annealed micrograined material having the same composition as the annealed 6061 aluminum alloy composition that is not subjected to any pre-anneal thermal or mechanical processes.
An annealed wrought ultrahigh performance metallic material comprising aluminum or aluminum alloy, the annealed wrought ultrahigh performance metallic material being manufactured by a method comprising:
- subjecting a semifinished metallic billet comprising at least one of a nanocrystalline microstructure and an ultrafine-grained microstructure to a rotary incremental forming process to form an intermediate wrought metallic billet, said rotary incremental forming process employing at least one of a rotary incremental forming process temperature, a rotary incremental forming process average equivalent strain rate, and a rotary incremental forming process reduction ratio;
- subjecting said intermediate wrought metallic billet to a high rate forming process to yield a wrought ultrahigh performance metallic material, wherein said high rate forming process comprises a high rate forming process average equivalent strain rate, said high rate forming process average equivalent strain rate being at least about 0.1 s−1;
- and
- annealing the wrought ultrahigh performance metallic material to yield the annealed wrought ultrahigh performance metallic material, wherein the annealed wrought ultrahigh performance metallic material has yield strength that is at least 50 percent higher than the yield strength of an annealed wrought micrograined material having the same composition as the ultrahigh performance metallic material that is not subjected to any pre-anneal thermal or mechanical processes.
Dependencies are inferred from the claim text.