Using pyrometry to identify porosity in additively manufactured structures

Patent · Tue Apr 11 04:00:00 EDT 2023

OSTI ID:1998278

Mitchell, John A.

A method and apparatus for identifying porosity in a structure made by an additive manufacturing process in which a laser is scanned across layers of material to form the structure. Pyrometry data comprising images of the layers acquired during additive manufacturing of the structure is received. The pyrometry data is used to generate temperature data comprising estimated temperatures of points in the layers in the images of the layers. The temperature data is used to identify shapes fit to high temperature areas in the images of the layers. Conditions of the shapes fit to the high temperature areas in the images of the layers are identified. Outlier shapes are identified in the shapes fit to the high temperature areas in the images of the layers using the conditions of the shapes.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: NA0003525
• Assignee: National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
• Patent Number(s): 11,623,408
• Application Number: 16/817,340
• OSTI ID: 1998278
• Country of Publication: United States
• Language: English