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NDT.net Issue - 2019-10 - NEWS
NDT.net Issue: 2019-10
Publication: e-Journal of Nondestructive Testing (NDT) ISSN 1435-4934 (NDT.net Journal)

A Testia Research and Development Project: Metal Powder Characterization with CT

TESTIA France34, Toulouse, France

Additionally to “normal” Inspection of additive manufacturing (AM) parts, Computed Tomography is another promising method used by TESTIA. Over the past few years, the mechanical properties of AM metal parts have been developed immensely. But there is still potential to improve reproducibility. Metal powder plays a key role for this improvement and its parameters need to be thoroughly studied to ensure a good quality of printed parts.

Powder parameters can be divided into three categories: morphological (particle size distribution, particle shape, closed pores), chemical (composition, powder cleanliness) and parameters derived from these (powder density, flowability). Common analyzing methods can only determine one parameter each. TESTIA colleague Lucas Jobard developed a new analyzing method in his Masters thesis, which can inspect several parameters with only one scan: particle size distribution, particle shape, closed pores and powder cleanliness. Besides the new CT scan process he also developed an image quality indicator that enables a differentiation between different types of material inclusions (impurities). Our goal is to offer this scanning method as a TEST service in the near future.

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