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Neutron Measurements of Stresses in a Test Artifact produced by Laser-based Additive Manufacturing
Published
Author(s)
Thomas H. Gnaeupel-Herold, John A. Slotwinski, Shawn P. Moylan
Abstract
A stainless steel test artifact produced by Direct Metal Laser Sintering and similar to a proposed standardized test artifact was examined using neutron diffraction. The artifact contained a number of structures with different aspect ratios pertaining to wall thickness, height above base plate, and side length. Through spatial resolutions of the order of one millimeter the volumetric distribution of stresses in several was measured. It was found that the stresses peak in the tensile region around 500 MPa near the top surface, with balancing compressive stresses in the interior. The presence of a support structure (a one millimeter high, thin walled, hence weaker, lattice structure deposited on the base plate, followed by a fully dense AM structure) has only minor effects on the stresses.
, T.
, Slotwinski, J.
and Moylan, S.
(2014),
Neutron Measurements of Stresses in a Test Artifact produced by Laser-based Additive Manufacturing, AIP Conference Proceedings, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914674
(Accessed June 3, 2023)