Nanocrystalline bainitic steels, shafts, gas turbine engines, and methods of manufacturing nanocrystalline bainitic steels
US-2017275716-A1 · Sep 28, 2017 · US
US11053577B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11053577-B2 |
| Application number | US-201816219249-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 13, 2018 |
| Priority date | Dec 13, 2018 |
| Publication date | Jul 6, 2021 |
| Grant date | Jul 6, 2021 |
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A nickel-cobalt material and method of forming includes forming a doped nickel-cobalt precursor material. The method also includes heat treating the doped nickel-cobalt precursor material, wherein the heat treating includes at least heating within a temperature zone below the onset temperature for grain growth in the doped nickel-cobalt precursor material.
Opening claim text (preview).
What is claimed is: 1. A method of forming a material, the method comprising: forming a phosphorous-doped nickel-cobalt precursor material comprising from about 25% to about 40% by atomic weight of cobalt, from about 1,000 ppm to about 3,500 ppm by atomic weight of phosphorous, and nickel as the balance of the material; and heat treating the phosphorous-doped nickel-cobalt precursor material, wherein the heat treating includes at least heating at a temperature below the onset temperature for grain growth in the phosphorous-doped nickel-cobalt precursor material to form a heat treated nickel-cobalt material. 2. The method of claim 1 , wherein the doped nickel-cobalt precursor material comprises at least one of a phosphorous-doped nickel-cobalt material or a boron-doped nickel-cobalt material. 3. The method of claim 1 , wherein the heat treating forms phosphorous precipitates at nanocrystalline grain boundaries. 4. The method of claim 1 , wherein the heat treating forms intragranular twinning. 5. The method of claim 1 , wherein the heat treated nickel-cobalt material comprises a nanocrystalline grain structure having a grain size distribution of about 50 to 100 nanometers. 6. The method of claim 1 , wherein the heat treated nickel-cobalt material exhibits a fracture toughness of about 10 MPa·m 1/2 to 70 MPa·m 1/2 . 7. The method of claim 1 wherein the heat treating further comprises heat treating in a temperature zone from about 600 K to about 750 K. 8. The method of claim 1 wherein the heat treated nickel-cobalt material exhibits an ultimate tensile strength of from about 1,000 MPa to about 1,500 MPa. 9. The method of claim 1 wherein the forming a doped nickel-cobalt precursor material further comprises electroforming the doped nickel-cobalt precursor material. 10. A method of forming a material, the method comprising: forming a doped nickel-cobalt precursor material; and heat treating the doped nickel-cobalt precursor material, wherein the heat treating includes at least heating at a temperature below the onset temperature for grain growth in the doped nickel-cobalt precursor material to form a heat treated nickel-cobalt material; and wherein the heat treating forms phosphorous precipitates at nanocrystalline grain boundaries.
containing more than 50% by weight of iron or nickel or cobalt · CPC title
Separating compounds · CPC title
Electroforming · CPC title
Heat treatment · CPC title
Alloys · CPC title
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