US 12,168,267 B2
Method for treating an internal defect in a part
Hugo Jean-Louis Sistach, Moissy-Cramayel (FR); and Romaric Jean-Marie Piette, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/604,044
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Mar. 25, 2020, PCT No. PCT/EP2020/058403
§ 371(c)(1), (2) Date Oct. 15, 2021,
PCT Pub. No. WO2020/212104, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 1904036 (FR), filed on Apr. 16, 2019.
Prior Publication US 2022/0143758 A1, May 12, 2022
Int. Cl. B23K 26/53 (2014.01); B29C 67/04 (2017.01); B29C 73/34 (2006.01)
CPC B23K 26/53 (2015.10) [B29C 67/04 (2013.01); B29C 73/34 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for treating an internal defect in a part made of a material, the method comprising the steps of:
a) detecting and locating the internal defect in the part by a non-destructive technique;
b) defining, inside the part, a first target volume which contains a first portion of the defect and a second target volume juxtaposed to the first target volume which contains a second portion of the defect;
c) for each target volume of the first target volume and the second target volume, simultaneously irradiating the target volume by three beams which converge in the target volume and are continuous, whereby a treated area is obtained;
wherein the second portion of the defect is treated after the first portion of the defect has disappeared,
wherein an energy applied to the target volume by each beam is less than a threshold energy for sintering the material, and a sum of the energies applied to the target volume by each one of the beams is greater than or equal to a transformation threshold energy, the transformation threshold energy corresponding to the threshold energy for sintering the material, when it is desired to obtain a selective sintering of the material in the target volume, or to a threshold energy for melting the material, when it is desired to obtain a selective melting of the material in the target volume,
and wherein the material of the part is partially transparent to said three beams.