Powder hot isostatic pressing cycle
AssigneeBAE SYSTEMS plc
InventorsHoward James Price, Peter Neil Stewart, Sean Gallagher
Life of this patent
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Abstract
A method of fabricating, at least in part, an article from a precursor thereof, the method comprising: providing the precursor, wherein the precursor comprises a metal having a closed pore therein; and hot isostatic pressing, HIPing, the precursor at an Nth temperature of a set of temperatures, at an Nth pressure of a set of pressures and for an Nth duration of a set of durations, thereby fabricating, at least in part, the article; wherein HIPing the precursor comprises regulating the set of temperatures, the set of pressures and/or the set of durations to control, at least in part, a morphology of the closed pore.
Claims15
A method of fabricating an article from a precursor thereof, the method comprising:
- providing the precursor, comprising encapsulating a powder of an α+β Ti alloy in a container, wherein the powder is formed by electrode induction gas atomisation;
- cold pressurisation of the precursor by isostatically compressing the precursor at a first pressure, thereby providing a compressed precursor;
- and
- hot isostatic pressing, the compressed precursor at an Nth pressure in a range from 75 MPa to 150 MPa and at an Nth temperature in a range from 850° C. to 950° C., thereby fabricating the article;
- wherein a ratio of the first pressure to the Nth pressure is in a range from 1:2 to 9:10.
Dependencies are inferred from the claim text.