Abstract

This paper presents the findings of using jet electrochemical machining (Jet-ECM) as a post-processing technique on electron beam melting (EBM) parts. Poor surface finish is a negative characteristic, typically found in parts produced by additive manufacturing, and is prominent in EBM. Jet-ECM is a non-contact machining technique that uses anodic dissolution to locally remove material from electrically conductive parts. Jet-ECM has been proven to improve the surface finish on metallic parts. This study aims to further investigate the post-processing capability of Jet-ECM on a Ti6Al4V part produced by EBM. The influence of supply current, machining time and feed rate were assessed using a Jet-ECM system under development by Blueacre Technology and the University of Manchester. The study shows surface finish is improved from a starting value of 25 µm Ra and that Jet-ECM is a viable technique for the post processing of metallic printed parts.

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