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Manufacturing

Additive manufacturing

Additive Manufacturing Interlaboratory Studies

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The National Institute of Standard and Technology (NIST) Additive Manufacturing (AM) Program participates in interlaboratory studies (ILS) to verify and ensure accurate, reliable AM research. Below are two examples of recent AM interlaboratory studies and more are forthcoming. If you are interested in participating in an interlaboratory study, please contact us. 

Ceramic AM ILS: Interlaboratory Study of Flexural Strength in Additively Manufactured Alumina

Six laboratories participated in an international interlaboratory study of the flexural strength of alumina fabricated via vat photopolymerization ceramic additive manufacturing technology (Journal of the American Ceramic Society, 2024). 
Learn more about the ILS methods, results, and conclusions.

Contact: Russell Maier

Vertically built alumina test bars had frequent flaws leading to fractures. 3 images of seams and 3 images of agglomerates show areas where the alumina contain flaws that can cause fracturing of the built sample.
Fig. 13 Images of fracture surfaces highlighting examples of (a–c) seams and (d–f) agglomerates that acted as critical flaws in the alumina test bars. 
Credit: Journal of the American Ceramic Society, First published: 28 October 2024, DOI: (10.1111/jace.20133)

Interlaboratory Study on the 
Working Curve in 
Vat Photopolymerization 

24 laboratories participated in an interlaboratory study (ILS) on the working curve, a measurement used in photopolymer additive manufacturing (PAM). Each lab performed a working curve measurement using an aliquot from the same batch of PAM resin (Additive Manufacturing, 2024). Learn more about the ILS methods, results, and conclusions.

Contact: Jason Killgore

Anonymized plots of reported Cd vs E0 data for nominal wavelengths of interest (405 nm, 385 nm, and 365 nm), where Cd is measured cure depth and E0 is incident radiant exposure. Fits to the Jacobs equation are shown in panels (b), (d), and (f) to highlight the origin of the scatter in depth penetration Dp and critical exposure Ec, the radiant exposure of light required to form a solid (i.e., the gel point)..
Fig. 1 Cure depth Cd vs exposure E0 data reported by study participants at nominal wavelengths (a) 405 nm, (c) 385 nm, and (e) 365 nm. Fits to the Jacobs equation are shown in panels (b), (d), and (f) to highlight the origin of the scatter in Dp and Ec.               
Credit: Additive Manufacturing, published 25 March 2024, DOI: (10.1016/j.addma.2024.104082)

 

 

Manufacturing, Additive manufacturing, Materials, Metrology and Standards

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Additive Manufacturing Program Coordinator

Created November 11, 2024, Updated November 12, 2024