Tomography of Materials and Structures最新文献

{"title":"Machine learning-supported visual analytics for high resolution X-ray inspection of metal matrix composites","authors":"Thomas Lang ,&nbsp;Anja Heim ,&nbsp;Christoph Heinzl","doi":"10.1016/j.tmater.2024.100047","DOIUrl":"10.1016/j.tmater.2024.100047","url":null,"abstract":"<div><div>Metal matrix composites are utilized in a multitude of applications due to their mechanical and thermodynamical properties, which are highly dependent on the microstructure. A detailed characterization is thus vital for a sound understanding of the material’s properties. X-ray computed tomography, in particular high resolution synchrotron imaging, presents a promising inspection method for this purpose. However, a high-resolution inspection of medium-sized samples produces very large volumetric datasets, which prevents a proper data analysis with commonly available tools and software. We propose a workflow for analyzing large volumetric datasets of particle-reinforced metal matrix composites, from 3D renderings of the datasets to qualitative and quantitative characterizations of the material regarding shape and spatial distribution of the contained particles. Each step in this workflow is designed to be applicable to arbitrarily large volumetric datasets. Application-dependent visualizations facilitate derived secondary information to become accessible, generating in-depth insights despite the large number of particles. The workflow is demonstrated on a large high-resolution dataset in qualitative and quantitative evaluations, whose visual representations confirm that the distribution of particles within the sample is quite homogeneous albeit the presence of minor agglomerations.</div></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"7 ","pages":"Article 100047"},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-supervised resolution enhancement for anisotropic volumes in edge illumination X-ray phase contrast micro-computed tomography","authors":"Jiayang Shi ,&nbsp;Louisa Brown ,&nbsp;Amir R. Zekavat ,&nbsp;Daniël M. Pelt ,&nbsp;Charlotte K. Hagen","doi":"10.1016/j.tmater.2024.100046","DOIUrl":"10.1016/j.tmater.2024.100046","url":null,"abstract":"<div><div>X-ray phase contrast micro-computed tomography (micro-CT) can achieve higher contrast than conventional absorption-based X-ray micro-CT by utilizing refraction in addition to attenuation. In this work, we focus on a specific X-ray phase contrast technique, edge illumination (EI) micro-CT. EI uses a sample mask with transmitting apertures that split the X-ray beam into narrow beamlets, enabling detection of refraction-included intensity variations. Between the typical mask designs (circular and slit-shaped apertures), slit-shaped apertures offer practical advantages over circular ones, as they only require sample stepping in one direction, thereby reducing scanning time. However, this leads to anisotropic resolution, as the slit-shaped apertures enhances resolution only along the direction orthogonal to the slits. To address this limitation, we propose a self-supervised method that trains on high-resolution in-plane images to enhance resolution for out-of-plane images, effectively mitigating anisotropy. Our results on both simulated and real EI micro-CT datasets demonstrate the effectiveness of the proposed method.</div></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"7 ","pages":"Article 100046"},"PeriodicalIF":0.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental method for rubber deformation analysis using in situ X-ray tomography and digital volume correlation with FEM validation","authors":"J. Lachambre ,&nbsp;A. Sibellas ,&nbsp;J. Adrien ,&nbsp;J. Papillon ,&nbsp;R. Bruant ,&nbsp;G. Maurel ,&nbsp;E. Maire","doi":"10.1016/j.tmater.2024.100045","DOIUrl":"10.1016/j.tmater.2024.100045","url":null,"abstract":"<div><div>The grip and rolling resistance of car wheel tires on a road surface is strongly influenced by the mechanical properties of the rubber and especially by the deformation of this rubber during indentation by the road asperities. This paper presents the results of a simplified indentation experiment. A cylindrical block of rubber containing microstructural markers is indented by a sphere in situ inside an X-ray Computed Tomograph. The presence of markers intentionally added to the rubber gum allows us, after suitable image processing for contrast improvement, to measure with a very good precision the displacement field inside the rubber during the indentation using Digital Volume Correlation. The measured displacement is compared with the result of an axisymmetric finite element modeling calculation reproducing the experimental configuration. The close correlation between measured displacements and finite element modeling shows that the proposed method is suitable for studying rubber/road contact.</div></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"7 ","pages":"Article 100045"},"PeriodicalIF":0.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New watershed methods for isolating and characterizing discrete objects in 3D data sets","authors":"Richard A. Ketcham","doi":"10.1016/j.tmater.2024.100043","DOIUrl":"10.1016/j.tmater.2024.100043","url":null,"abstract":"<div><div>This paper introduces new algorithms for conducting and improving watershed analysis, implemented with the particular goal of improving the ability to measure the shapes of mineral grains to be subsequently be analyzed by mass spectrometry. This application requires a high degree of accuracy and fidelity in terms of both separating all touching grains and preserving their shapes. The algorithms are designed to take advantage of a vector-based programming environment. A new implementation of the Euclidean distance transform utilizes the fact that the distance from any adjacent pair of voxels to the nearest boundary must be within one voxel of each other. In practice, however, this algorithm is outperformed by a smoothed approximate distance transform that is faster to compute and results in less irregular watershed boundaries. A one-pass rainfall-based watershed algorithm is introduced that runs in linear time with the number of segmented voxels, and requires no priority queue. Unlike marker-based watershed algorithms based on the basin-filling approach, the rainfall approach finds watersheds associated with all local maxima in the distance map, even if a marking algorithm is used. A post-watershed smoothing algorithm improves watershed boundaries and eliminates small spurious watersheds. The one-pass watershed and post-watershed smoothing algorithms run in times superior or comparable to basin-fill watershed algorithms implemented in other environments, and offers excellent ability to separate touching objects efficiently while placing watershed boundaries that maximize the preservation of details of particle shape. Further time improvement could come from implementing them in a vector-based environment that allows explicit multi-threading.</div></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"7 ","pages":"Article 100043"},"PeriodicalIF":0.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical failure modelling of natural fibre composite coupons using X-ray computed tomography based modelling","authors":"Marcus Iversen ,&nbsp;Anton Årmann ,&nbsp;Robert M. Auenhammer ,&nbsp;Nikoleta Pasvanti ,&nbsp;Johann Körbelin ,&nbsp;Kai Kallio ,&nbsp;Leif E. Asp ,&nbsp;Renaud Gutkin","doi":"10.1016/j.tmater.2024.100042","DOIUrl":"10.1016/j.tmater.2024.100042","url":null,"abstract":"<div><div>Natural fibre composites offer versatile applications across industries while being superior in sustainability aspects compared to other composite types. To unlock their full potential, it is essential to understand their complex failure involving fibre failure, matrix cracking, and debonding at the fibre-matrix interface. Efforts to address these challenges focus on advanced numerical models, probing behaviour from micro to macro scales. However, these models face complexities in handling intricate failure modes given the non-uniform nature of natural fibres. To overcome these challenges, image-based modelling using X-ray computed tomography scans is proposed. This work’s novelty lies in integrating detailed microstructure information with a nonlinear calibration procedure to accurately model damage and failure in natural fiber composites. It marks a significant step toward developing a virtual testing model, paving the way for assessing composites with varying fiber content or fiber types.</div></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"6 ","pages":"Article 100042"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A protocol and graphical user interface to assist new users with the planning of X-ray computed tomography experiments","authors":"Jose Ricardo Assuncao Godinho ,&nbsp;Hannah Vogel ,&nbsp;Oliver Plümper ,&nbsp;Laurenz Schröer ,&nbsp;Florian Buyse ,&nbsp;Veerle Cnudde ,&nbsp;Peter Moonen","doi":"10.1016/j.tmater.2024.100041","DOIUrl":"10.1016/j.tmater.2024.100041","url":null,"abstract":"<div><div>X-ray computed micro tomography (CT) is the main 3D technique for imaging the internal microstructures of samples. Experimental planning is crucial to ensure the adequacy of CT results to answer specific scientific questions, optimizing the use of resources and maximizing the quality of results. Proper planning requires a certain level of expertise in the technique and the details of the specific scientific question to be answered. Notably, potential new CT users who have formulated a scientific question may not have the in-depth knowledge about CT necessary to make a first assessment of whether CT is suitable for their work. Here, a step-by-step protocol to plan CT experiments and an interactive graphical user interface (XCT-Explorer) are proposed to guide users through the different steps of the protocol and to link the various CT parameters required to perform a scan. The protocol is based on the experience gained within EXCITE (Electron and X-ray microscopy Community for structural and chemical Imaging Techniques for Earth materials) through interactions between facility managers and users from various scientific fields. The planning protocol aims to 1) help potential CT users with limited knowledge of CT (e.g. first-time users) to decide whether CT can answer their scientific question; 2) guide users to decide which parameters are the most appropriate for their sample/problem; 3) facilitate the initial contact between CT provider and new users; and 4) standardize the planning stage of CT experiments as the foundation for FAIR (Findable Accessible Interoperable and Reusable) practices.</div></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"6 ","pages":"Article 100041"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D empirical mineral dissolution model of galena (PbS) in ethaline solution","authors":"Chandra Widyananda Winardhi ,&nbsp;Jose Ricardo da Assuncao Godinho ,&nbsp;Veerle Cnudde ,&nbsp;Jens Gutzmer","doi":"10.1016/j.tmater.2024.100040","DOIUrl":"https://doi.org/10.1016/j.tmater.2024.100040","url":null,"abstract":"<div><p>Mineral dissolution is an important process that occurs in both natural as well as anthropogenic processes. The kinetics of such dissolution processes are influenced not only by the characteristics of the solution but also by the characteristics of the minerals, such as crystal defects on the microscopic scale or macroscopic features such as the intersection of crystal planes to form edges and corners. Macroscopic features are known to increase the population of steps and kinks that may, in turn, affect the dissolution rate over time. Hence, this study presents a 3D empirical dissolution model aimed at examining the time-series evolution of macroscopic features together with the corresponding changes in the dissolution rate under far from equilibrium batch reactor conditions. The developed empirical model is based on the mineral geometry (surface topography and volume) derived from X-ray computed tomography (CT) measurements. The macroscopic features are identified using surface curvature which are then used to generate reactivity maps for dissolution model. As a study case, the dissolution of monomineralic galena (PbS) in ethaline and iodine as oxidizing agent is experimentally observed and then modelled. The model is then applied to seven particles of various shapes and sizes. The finding suggests that the surface reactivity increases over time as the particle shrinks and the macroscale steps and edges become dominant over the initial terraces. This implies that the persistent highly reactive surface sites defined by a particle’s geometry may play a dominant role in the overall particle dissolution in addition to the dissolution mechanisms typically studied on near atomic-flat surfaces. The model developed in this investigation offers the opportunity to be extended providing the possibility of simulating the dissolution of multi-mineral particles during batch dissolution experiments.</p></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"6 ","pages":"Article 100040"},"PeriodicalIF":0.0,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949673X24000172/pdfft?md5=a32997434eca2a39dce7135b5a8c0f80&pid=1-s2.0-S2949673X24000172-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141605699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cross-detector scatter issues in dual synchronous tomography: An affine projection correction protocol","authors":"Jean Michel Létang ,&nbsp;Joël Lachambre ,&nbsp;Éric Maire","doi":"10.1016/j.tmater.2024.100039","DOIUrl":"10.1016/j.tmater.2024.100039","url":null,"abstract":"<div><p>Dual-beam x-ray tomography systems are paving the way for new experimental procedures, such as multi-resolution and multi-energy imaging, where synchronous acquisitions are essential. However, in such systems, cross-detector scatter between the detecting devices can occur as the two beamlines operate simultaneously. This paper proposes a new affine image transformation model of each projection to correct for these cross-detector scatter issues. A toy tomography test case is presented to assess the feasibility and performance of the proposed correction method.</p></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"6 ","pages":"Article 100039"},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949673X24000160/pdfft?md5=2bfc02de3210eaa9fbe6cd363bac35df&pid=1-s2.0-S2949673X24000160-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141622951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Screening staining agents for contrast-enhanced microCT of vascular tissues: Assessing the effect on microstructural and mechanical properties","authors":"M. Pétré ,&nbsp;T. Balcaen ,&nbsp;P. Schneidewind ,&nbsp;L. Mazy ,&nbsp;G. Pyka ,&nbsp;H. Fehervary ,&nbsp;N. Famaey ,&nbsp;G. Kerckhofs","doi":"10.1016/j.tmater.2024.100038","DOIUrl":"https://doi.org/10.1016/j.tmater.2024.100038","url":null,"abstract":"<div><p>Cardiovascular tissues possess a complex microstructure, which remodel and adapt due to ageing and diseases. This complex and evolving microstructure is intrinsically linked to the tissue’s mechanical properties. To better understand how changes in the microstructure can impact the mechanical behavior, 4D-contrast-enhanced microCT (4D-CECT) can be used (i.e. in situ mechanical loading combined with 3D microstructural visualization). Since absorption-based CECT requires the use of contrast-enhancing staining agents (CESAs), we investigated six different CESAs for their suitability for 4D-CECT imaging of arterial tissue, considering their ability to provide good microstructural visualization and segmentation while ensuring the preservation of the mechanical properties. For this purpose, the penetration speed, contrast-enhancement, volume change, and stiffness change of porcine arterial tissue stained with the different CESA solutions were studied. Based on our results, we selected 1:2 Hafnium-substituted Wells-Dawson Polyoxometalate as the most suited CESA for 4D-CECT of arterial tissue. Phosphotungstic acid (PTA) and Lugol iodine with Sorensen’s buffer (Lugol), despite being the reference in the state-of-the-art as CESA and having excellent contrast-enhancement properties, were the only ones that significantly affected the mechanical properties of porcine arterial tissue. Additionally, for these two solutions, tissue shrinkage was observed, resulting in a volume reduction of approximately − 12 % for PTA and − 17 % for Lugol. Finally, it was observed that the penetration speed of all CESA solutions exhibited a ratio of 60–40 % from the intimal side to the adventitial side, which is likely due to the denser packing of elastic lamellae towards the adventitia. Overall, our study offers valuable new insights for selecting and comparing various CESA solutions for (4D-)CECT.</p></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"6 ","pages":"Article 100038"},"PeriodicalIF":0.0,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949673X24000159/pdfft?md5=d84ff581b2d4237b266e6598bde3236a&pid=1-s2.0-S2949673X24000159-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141582162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent developments in fly scan methods for phase and multi-contrast x-ray micro-CT based on amplitude modulated beams","authors":"Grammatiki Lioliou ,&nbsp;Oriol Roche i Morgó ,&nbsp;Alberto Astolfo ,&nbsp;Amir Reza Zekavat ,&nbsp;Marco Endrizzi ,&nbsp;David Bate ,&nbsp;Silvia Cipiccia ,&nbsp;Alessandro Olivo ,&nbsp;Charlotte Hagen","doi":"10.1016/j.tmater.2024.100034","DOIUrl":"https://doi.org/10.1016/j.tmater.2024.100034","url":null,"abstract":"<div><p>Beam tracking and edge illumination are phase contrast imaging techniques that rely on amplitude modulated x-ray beams to generate sensitivity to refraction and scattering. While each technique has its advantage (“single shot” three-contrast imaging in beam tracking; the ability to work with relatively large pixels in edge illumination), they also share a common drawback, namely that the modulator shields parts of the sample and, thus, prevents those areas from contributing to the image (under-sampling). Sample stepping, by which frames are acquired with the sample in a different position relative to the modulator (sometimes referred to as “dithering”) can produce well-sampled images. However, in computed tomography (CT), stepping must be performed at each rotation angle, enforcing step-and-shoot acquisitions and leading to long scan times. To enable faster acquisitions, fly scan compatible scanning schemes based on “roto-translating” the sample in the modulated x-ray beam were recently developed. This article reviews these schemes and provides practical guidance for their implementation.</p></div>","PeriodicalId":101254,"journal":{"name":"Tomography of Materials and Structures","volume":"5 ","pages":"Article 100034"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949673X24000111/pdfft?md5=ecc26bd547fd0e42a885641b61baa530&pid=1-s2.0-S2949673X24000111-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141241389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}