US 11,980,969 B2
Metal additive manufacturing method and article
Tahany Ibrahim El-Wardany, Vernon, CT (US); Matthew Grow, Glastonbury, CT (US); Michael A. Klecka, Coventry, CT (US); Gregory W. Levan, Avon, CT (US); and Daniel K. Seabourn, South Windsor, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Apr. 15, 2020, as Appl. No. 16/849,004.
Claims priority of provisional application 62/835,818, filed on Apr. 18, 2019.
Prior Publication US 2020/0331099 A1, Oct. 22, 2020
Int. Cl. B23K 26/342 (2014.01); B22F 10/25 (2021.01); B22F 10/36 (2021.01); B22F 10/64 (2021.01); B33Y 10/00 (2015.01); B33Y 40/00 (2020.01); B33Y 80/00 (2015.01)
CPC B23K 26/342 (2015.10) [B22F 10/25 (2021.01); B33Y 10/00 (2014.12); B33Y 40/00 (2014.12); B33Y 80/00 (2014.12); B22F 10/36 (2021.01); B22F 10/64 (2021.01); B22F 2998/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for making a metal article comprising:
repetitively depositing a layer of metal by additive manufacturing and cold working each metal layer to form the metal article;
wherein the cold working comprises directionally cold working each metal layer;
wherein the additive manufacturing parameters are manipulated to control local average grain size and the cold working parameters are manipulated to control local grain crystallographic orientation to provide a customized local average grain size and a customized local non-random grain crystallographic orientation of the metal article; and
wherein the local non-random grain crystallographic orientation varies by region within the metal article based on design requirements;
wherein the metal article has a first physical property in a first region and a second physical property in a second region;
wherein the first region has a first physical property value of the first physical property and the second region has a second physical property value of the second physical property, the first physical property value different than the second physical property value; and
wherein the first and second regions each comprise multiple layers of deposited metal.