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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.
Citation
AIP Conference Proceedings
Volume
1581

Keywords

Residual Stress, Additive Manufacturing, Powder Bed Fusion, Direct Metal Laser Sintering

Citation

, 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 April 21, 2024)
Created February 18, 2014, Updated February 19, 2017