3D Surface Texture Characterisation Techniques for Additive Manufacturing Components

Additive manufacturing (AM) components feature highly complex geometry (e.g. freeform shapes, lattice structures) and 3D surface topography (e.g. re-entrant faetures, undercuts). X-ray computed tomography (XCT) allows the evaluation of additional AM surface features, such as particle features (e.g. undercuts and overhangs), surface cracks, and open porosity (e.g. open connected sub-surface pores) - the unique characteristics of AM surfaces. An improved understanding of the impacts of these features will assist in efforts to predict the performance of AM parts, e.g. fatigue, heat exchange and osseointegration. However, a daunting challenge is how to characterise them. The Centre of Precision Technologies (CPT) at the University of Huddersfield is developing a spectrum of 3D characterisation techniques to address these challenges.