Journal ArticleDOI
Software tools for quantification of X-ray microtomography at the UGCT
Jelle Vlassenbroeck,Manuel Dierick,Bert Masschaele,Veerle Cnudde,L. Van Hoorebeke,Patric Jacobs +5 more
TLDR
In this paper, the authors discuss the software tools for reconstruction and analysis of tomographic data that are being developed at the UGCT, and the analysis of the 3D data focuses primarily on the characterization of pore structures, but will be extended to other applications.Abstract:
The technique of X-ray microtomography using X-ray tube radiation offers an interesting tool for the non-destructive investigation of a wide range of materials. A major challenge lies in the analysis and quantification of the resulting data, allowing for a full characterization of the sample under investigation. In this paper, we discuss the software tools for reconstruction and analysis of tomographic data that are being developed at the UGCT. The tomographic reconstruction is performed using Octopus, a high-performance and user-friendly software package. The reconstruction process transforms the raw acquisition data into a stack of 2D cross-sections through the sample, resulting in a 3D data set. A number of artifact and noise reduction algorithms are integrated to reduce ring artifacts, beam hardening artifacts, COR misalignment, detector or stage tilt, pixel non-linearities, etc. These corrections are very important to facilitate the analysis of the 3D data. The analysis of the 3D data focuses primarily on the characterization of pore structures, but will be extended to other applications. A first package for the analysis of pore structures in three dimensions was developed under Matlab®. A new package, called Morpho+, is being developed in a C++ environment, with optimizations and extensions of the previously used algorithms. The current status of this project will be discussed. Examples of pore analysis can be found in pharmaceuticals, material science, geology and numerous other fields.read more
Citations
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Journal ArticleDOI
High-resolution X-ray computed tomography in geosciences: A review of the current technology and applications
Veerle Cnudde,Matthieu Boone +1 more
TL;DR: A review of the principle, the advantages and limitations of X-ray CT itself are presented, together with an overview of some current applications of micro-CT in geosciences.
Journal ArticleDOI
Observation of keyhole-mode laser melting in laser powder-bed fusion additive manufacturing
Wayne E. King,Holly D. Barth,Victor Castillo,Gilbert F. Gallegos,John W. Gibbs,John W. Gibbs,Douglas E. Hahn,Chandrika Kamath,Alexander M. Rubenchik +8 more
TL;DR: In this article, the experimental observation of keyhole-mode laser melting in a laser powder-bed fusion additive manufacturing setting for 316L stainless steel is presented, and the conditions required to transition from conduction controlled melting to keyholemode melting are identified.
Journal ArticleDOI
Imaging and image-based fluid transport modeling at the pore scale in geological materials : a practical introduction to the current state-of-the-art
TL;DR: This review aims to provide a practical and accessible introduction to both the experimental and numerical state-of-the-art, intended for students and researchers with backgrounds in experimental geo-sciences or computational sciences alike.
Journal ArticleDOI
Self-healing efficiency of cementitious materials containing tubular capsules filled with healing agent
TL;DR: In this article, an encapsulated healing agent was embedded in the mortar matrix to obtain self-healing properties, and upon crack appearance, the capsules break and the healing agent is released, causing crack repair.
Journal ArticleDOI
Age-related changes in the plasticity and toughness of human cortical bone at multiple length scales
Elizabeth A. Zimmermann,Eric Schaible,Hrishikesh Bale,Holly D. Barth,Holly D. Barth,Simon Y. Tang,Peter Reichert,Bjoern Busse,Tamara Alliston,Joel W. Ager,Robert O. Ritchie,Robert O. Ritchie +11 more
TL;DR: This work attributes the loss in toughness to increased nonenzymatic collagen cross-linking, which suppresses plasticity at nanoscale dimensions, and to an increased osteonal density, which limits the potency of crack-bridging mechanisms at micrometer scales.
References
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Journal Article
Practical cone-beam algorithm
TL;DR: In this article, a convolution-backprojection formula is deduced for direct reconstruction of a three-dimensional density function from a set of two-dimensional projections, which has useful properties, including errors that are relatively small in many practical instances and a form that leads to convenient computation.
Journal ArticleDOI
Practical cone-beam algorithm
TL;DR: In this article, a convolution-backprojection formula is deduced for direct reconstruction of a three-dimensional density function from a set of two-dimensional projections, which has useful properties, including errors that are relatively small in many practical instances and a form that leads to convenient computation.
Book
Morphological Image Analysis
TL;DR: The first € price and the £ and $ price are net prices, subject to local VAT, and the €(D) includes 7% for Germany, the€(A) includes 10% for Austria.
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High-resolution X-ray computed tomography in geosciences: A review of the current technology and applications
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