US 12,285,804 B2
Method to produce an additively manufactured, graded composite transition joint
Xingbo Liu, Morgantown, WV (US); Zhili Feng, Knoxville, TN (US); Yanli Wang, Knoxville, TN (US); David Novotnak, Mcdonald, PA (US); and Haiyang Qian, Avon, CT (US)
Assigned to GE Infrastructure Technology LLC, Greenville, SC (US); UT Battelle, LLC, Oak Ridge, TN (US); West Virginia University Board of Governors on Behalf of West Virginia University, Morgantown, WV (US); and Carpenter Technology Corporation, Philadelphia, PA (US)
Appl. No. 18/000,622
Filed by Carpenter Technology Corporation, Philadelphia, PA (US); UT-Battelle, LLC, Oak Ridge, TN (US); West Virginia University Board of Governors on behalf of West Virginia University, Morgantown, WV (US); and General Electric Company, Schenectady, NY (US)
PCT Filed Jun. 4, 2021, PCT No. PCT/US2021/035855
§ 371(c)(1), (2) Date Dec. 2, 2022,
PCT Pub. No. WO2021/247970, PCT Pub. Date Dec. 9, 2021.
Claims priority of provisional application 62/704,965, filed on Jun. 4, 2020.
Prior Publication US 2023/0211415 A1, Jul. 6, 2023
Int. Cl. B22F 7/06 (2006.01); B22F 7/00 (2006.01); B22F 10/28 (2021.01); B22F 10/38 (2021.01); B23K 35/22 (2006.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01)
CPC B22F 7/062 (2013.01) [B22F 7/002 (2013.01); B22F 10/28 (2021.01); B22F 10/38 (2021.01); B23K 35/22 (2013.01); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12); B22F 2207/01 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for producing an additively manufactured, graded composite transition joint (AM-GCTJ), the method comprising:
preparing a grating or lattice pattern from a first alloy A, wherein the grating or lattice pattern includes pores in the grating or lattice pattern;
building the grating or lattice pattern from a first end to a second end of the grating or lattice pattern, the grating or lattice pattern having a density being more dense on the first end than the second end, and wherein the grating or lattice pattern gradually reduces the density by at least one of increasing the pore size from the first end to the second end or reducing the density of the grating or lattice pattern as the grating or lattice pattern is additively manufactured;
adding a second alloy B powder to the grating or lattice pattern
from the first end towards the second end of the grating or lattice pattern;
forming a composite of the first alloy A and the second alloy B powder in the AM-GCTJ; and
subjecting the composite to hot isostatic pressing (HIP) to densify the composite, wherein, the second alloy B powder has a graduated concentration from the first end to the second end of the AM-GCTJ.