Surface Roughness and Design for Additive Manufacturing: A Design Artefact Investigation

Abstract

Laser Powder Bed Fusion (LPBF) brings the possibility to manufacture innovative near-net-shape part designs. But unfortunately, some designed surfaces suffer from rough surface finish due to characteristics of the LPBF process. This paper explores trends in managing surface roughness and through a space industry case study, a proposed process that uses Additive Manufacturing Design Artefacts (AMDAs) is used to investigate the relationship between design, surface roughness and fatigue. The process enables the identification of design uncertainties, however, iterations of AMDA's can be required.

Stress concentrations and design for additive manufacturing: a design artefact approach to investigation

“…radius and surface roughness measurements, the measurement equipment further constrains the artefact design. For this investigation, the artefact's design is based on similar research using design artefacts to investigate a PSPP relationship by Obilanade et al (2022). In that work, a design artefact and experiment were proposed by engineers investigating the performance of a specific radius related to a design uncertainty of an AM rocket engine turbine manifold.…”