AM Powder and Solid Composition Analysis Over Time

Tammy Pond
KCNSC, Missouri, United States

Keywords: Additive Manufacturing, Powder, Composition

Powder used for processing of additively manufactured metal parts degrades with use. Numerous studies have been performed by others to build an understanding of that degradation, but these studies do not include analysis of 316L. The Kansas City National Security Campus and Lawrence Livermore National Laboratory analyzed the degradation of 316L powder on a single Renishaw AM250 platform and with a consistent part heat signature. The 15 month long study included characterization of the process, powder, and solid articles processed over 13 cycles of powder use. The results of this analysis will support the entire Nuclear Security Enterprise in understanding the effects of AM processing on powder degradation and how it affects material properties. This poster will detail the elemental analysis of the powder and solid articles. Equipment used in this analysis include iCAP (inductively coupled argon plasma), inert gas fusion and combustion analysis. Powders from various locations of the powder bed, stages in the process (pre sieve, debris and post sieve), as well as from different cycles were analyzed for elemental composition. Solid articles from different cycles were also analyzed.