US 12,479,025 B2
Powder hot isostatic pressing cycle
Howard James Price, Balderstone (GB); Peter Neil Stewart, Balderstone (GB); and Sean Gallagher, Balderstone (GB)
Assigned to BAE Systems plc, London (GB)
Appl. No. 18/028,034
Filed by BAE Systems plc, London (GB)
PCT Filed Sep. 21, 2021, PCT No. PCT/GB2021/052442
§ 371(c)(1), (2) Date Mar. 23, 2023,
PCT Pub. No. WO2022/064181, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 20275147 (EP), filed on Sep. 24, 2020; and application No. 2015099 (GB), filed on Sep. 24, 2020.
Prior Publication US 2023/0339021 A1, Oct. 26, 2023
Int. Cl. B22F 3/16 (2006.01); B22F 3/04 (2006.01); B22F 3/15 (2006.01)
CPC B22F 3/16 (2013.01) [B22F 3/04 (2013.01); B22F 3/15 (2013.01); B22F 2301/205 (2013.01); B22F 2304/10 (2013.01); B22F 2998/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. 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.