Fatigue and Corrosion Evaluation of L-PBF 316L Stainless Steel Having Undergone a Self-Terminating Etching Process for Surface Finish Improvement.

The poor surface finish of as-printed (AP) laser powder bed fusion (L-PBF) 316L stainless steels has detrimental impacts on the resulting fatigue and corrosion performance. One postprocessing method, a self-terminating etching process (STEP), can improve the surface finish of parts up to 76%, but the resulting effects on fatigue life and corrosion reliability remain unknown. This work evaluates the effect of the STEP on the fatigue and corrosion performance of L-PBF 316L.

Parents and Provider Perspectives on the Return of Genomic Findings for Cleft Families in Africa.

Background: Inadequate knowledge among health care providers (HCPs) and parents of affected children limits the understanding and utility of secondary genetic findings (SFs) in under-represented populations in genomics research. SFs arise from deep DNA sequencing done for research or diagnostic purposes and may burden patients and their families despite their potential health importance. This study aims to evaluate the perspective of both groups regarding SFs and their choices in the return of results from genetic testing in the context of orofacial clefts.

Effect of Microstructure and Dislocation Density on Material Removal and Surface Finish of Laser Powder Bed Fusion 316L Stainless Steel Subject to a Self-Terminating Etching Process.

Postprocessing of additively manufactured (AM) metal parts to remove support structures or improve the surface condition can be a manually intensive process. One novel solution is a two-step, self-terminating etching process (STEP), which achieves both support removal and surface smoothing. While the STEP has been demonstrated for laser powder bed fusion (L-PBF) 316L stainless steel, this work evaluates the impact of pre-STEP heat treatments and resulting changes in dislocation density and microstructure on the resulting surface roughness and amount of material removed.

Small mammal studies in a SAD baiting area.

Studies in the laboratory or in the field on the effect of SAD virus on small rodents are reported. Laboratory experiments by oral inoculation of SAD strain in a wide variety of small mammals led to the conclusion that spontaneous SAD transmission from rodent to rodent is a rare event. Field experiments were conducted by live-trapping, sacrifice and analysis of 192 Apodemus sylvaticus, 28 Clethrionomys glareolus and 48 Crocidura russula.