Method for fabricating a thick Ti64 alloy article to have a higher surface yield and tensile strengths and a lower centerline yield and tensile strengths
US7481898B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2003 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Mar 13, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/183
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A Ti-6Al-4V-0.2O (Ti64) forged article is fabricated by forging a workpiece to make a forged gas turbine engine component having a thick portion thereof with a section thickness greater than 2¼ inches. The forged article is heat treated by solution heat treating at a temperature of from about 50° F. to about 75° F. below the beta-transus temperature of the alloy, thereafter water quenching the gas turbine engine component to room temperature, and thereafter aging the gas turbine engine component at a temperature of from about 900° F. to about 1000° F. The resulting machined gas turbine engine component has a 0.2 percent yield strength of from about 120 ksi to about 140 ksi at its centerline, and a 0.2 percent yield strength of from about 160 ksi to about 175 ksi at a location about ½ inch below a surface thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.