Investigations on printing path dependent properties of additively manufactured samples using micro computed tomography

Abstract

Purpose The purpose of this paper is to understand the relationship between defect properties and the tool path used for generating additively manufactured parts. The correlation between processing strategy and porosity architecture is one of the key aspects for a precise understanding of defect formation and possibilities for defect reduction. Design/methodology/approach The authors present a new combined geometry, processing path and porosity analysis procedure based on the use of x-ray computed micro tomography image data and numerical control programming code. The procedure allows for a covisualisation of the track of the respective processing head with the three-dimensional microstructure data. Findings The presented method yields statistical results about defect distribution and morphologies introduced by the respective process characteristics in parts. The functionality of the proposed procedure is demonstrated on an aluminum (AlSi10Mg) and a polylactide test sample to show the additional insight found for both additive manufacturing processes and the resulting microstructural properties. Originality/value The novelty of this paper is the analysis of the porosity with respect to the underlying additive process zone and the sample geometry.

How defects depend on geometry and scanning strategy in additively manufactured AlSi10Mg

“…The.vtk file contains the toolpath trajectory and metadata such as the lengths of line segments, which will be discussed in this work. The G-code parsing, analysis and.vtk export is similar to the procedure described in Englert et al (2020). The software can be accessed at https://sourceforge.net/projects/ctfam/.…”

Innovative Anwendungen der industriellen Mikro-CT aus Sicht der Radiologietechnologie

“…Forschungsgegenstände sind im Rahmen von „reverse engineering“ radiologische Untersuchungen in Bezug auf Fehlereigenschaften, Defekte oder auf die Porosität, also der Präsenz von Hohlräumen in Bezug auf das Gesamtvolumen 12 . Ziel ist zumeist, entsprechende Mess- und Analyse-Verfahren zu entwickeln, die eine höchste Produktionsqualität ermöglichen.…”

“…:2 mm = 2 000 m 0,005 mm = 5 m Faktor 400Grenzauflösung industrielles Micro CT ca.:▶Abb. 2 Vergleich Grenzauflösung Mikro-CT zu Humanmedizin.schaften, Defekte oder auf die Porosität, also der Präsenz von Hohlräumen in Bezug auf das Gesamtvolumen[12]. Ziel ist zumeist, entsprechende Mess-und Analyse-Verfahren zu entwickeln, die eine höchste Produktionsqualität ermöglichen.…”

An Experimental Investigation of Polymer Additive Manufacturing

“…A computer is used to analysis the particulate projections, and therefore the procedure is called micro-computed tomography (Micro-CT). The innovation of Micro-CT and its detailed history have been described by Gapiński et al [108], Englert et al [109], Ritman [110] and du Plessis et al [111] Micro-CT is a non-destructive 3D imaging technique that has the capability to investigate the three-dimensional microstructure of complex parts. Therefore, Micro-CT is considered as a suitable method to analyses the internal structure of AM parts manufactured by FDM machine.…”