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1

Suzuki, Asuka, Yusuke Sasa, Makoto Kobashi, et al. "Persistent Homology Analysis of the Microstructure of Laser-Powder-Bed-Fused Al–12Si Alloy." Materials 16, no. 22 (2023): 7228. http://dx.doi.org/10.3390/ma16227228.

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The laser powder bed fusion (L-PBF) process provides the cellular microstructure (primary α phase surrounded by a eutectic Si network) inside hypo-eutectic Al–Si alloys. The microstructure changes to the particle-dispersed microstructure with heat treatments at around 500 °C. The microstructural change leads to a significant reduction in the tensile strength. However, the microstructural descriptors representing the cellular and particle-dispersed microstructures have not been established, resulting in difficulty in terms of discussion regarding the structure–property relationship. In this stu
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2

Li, Qinghua, Qingyu Guan, Yi Ji, Wenyang Xu, and Tiantian Xu. "Optimizing Dual-Microstructure Parameters in Ball-End Milling Tools: Synergistic Effects and Parameter Combination Analysis." Applied Sciences 15, no. 11 (2025): 6329. https://doi.org/10.3390/app15116329.

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To address the issues of high cutting speeds and low surface precision during milling, this study investigates the effects of front and back cutting face microstructures on ball-end milling cutters processing 304 stainless steel. Firstly, a theoretical energy model for front and back cutting face microstructures is established to verify the feasibility of embedding microstructures. Then, finite element analyses are conducted on cutters with varying microstructure parameters on front and back cutting faces to determine reasonable parameter ranges. Parameter combinations are subsequently used to
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3

Nolan, T. P., R. Sinclair, T. Yamashita, and R. Ranjan. "Correlation of micro-structural, micro-chemical and micro-magnetic properties of longitudinal recording media using CM20FEG Lorentz TEM." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 892–93. http://dx.doi.org/10.1017/s042482010017219x.

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Cobalt alloy on chromium thin film magnetic media are used in industry computer hard disk drives because of their large values of coercivity (Hc), remanent magnetization (Mr), squareness (S*), and relatively low noise. The magnetic performance depends strongly on processing conditions and the resulting nanometer scale microstructure.A complete structure-processing-properties analysis requires effective measurement of magnetic and microstructural properties. To date, most structure-properties analyses have involved correlation of bulk magnetic (hysteresis loop) properties and magnetic recording
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Han, Yuexing, Chuanbin Lai, Bing Wang, Tianyi Hu, Dongli Hu, and Hui Gu. "SEGMENTATION AND ANALYSIS METHOD FOR TWO-PHASE CERAMIC (HfB2-B4C) BASED ON THE DETECTION OF VIRTUAL BOUNDARIES." Image Analysis & Stereology 38, no. 1 (2019): 95. http://dx.doi.org/10.5566/ias.1992.

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Microstructure of a material stores the genesis of the material and shows various properties of the material. To efficiently analyse the microstructure of a material, the segmentation of different phases or constituents is an important step. However, in general, due to the microstructure’s complexity, most of segmentation is manually done by human experts. It is challenging to automatically segment the material phases and the microstructure. In this work, we propose a method which combines the the dilation operator, GLCM (gray-level co-occurrence matrix), Hough transform and DBSCAN (density-ba
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5

Trzciński, Jerzy, and Emilia Wójcik. "Application of microstructure classification for the assessment of the variability of geological-engineering and pore space properties in clay soils." Open Geosciences 11, no. 1 (2019): 236–48. http://dx.doi.org/10.1515/geo-2019-0019.

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Abstract The performed investigations were focused on analysing the variability of geological-engineering properties in clay soils from central-eastern Europe with regard to microstructures. Thirty-nine soils differing in origin, lithology and microstructure type were selected for analysis. Results of studies on lithological and physical and mechanical parameters were analysed, coupled with quantitative microstructural parameters based on microstructure images. The relationships between lithological, physical and mechanical and pore space parameters were determined with regard to microstructur
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6

Müller, Martin, Marie Stiefel, Björn-Ivo Bachmann, Dominik Britz, and Frank Mücklich. "Overview: Machine Learning for Segmentation and Classification of Complex Steel Microstructures." Metals 14, no. 5 (2024): 553. http://dx.doi.org/10.3390/met14050553.

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The foundation of materials science and engineering is the establishment of process–microstructure–property links, which in turn form the basis for materials and process development and optimization. At the heart of this is the characterization and quantification of the material’s microstructure. To date, microstructure quantification has traditionally involved a human deciding what to measure and included labor-intensive manual evaluation. Recent advancements in artificial intelligence (AI) and machine learning (ML) offer exciting new approaches to microstructural quantification, especially c
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7

Kumar, Swarup, Asif Uzzaman, Md Ibrahim Adam, and Sree Biddut Kumar. "A Comprehensive Review of Prospects and Challenges of Microstructure and Functional Properties of Materials." European Journal of Theoretical and Applied Sciences 3, no. 2 (2025): 356–70. https://doi.org/10.59324/ejtas.2025.3(2).31.

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This thorough analysis examines the opportunities and difficulties related to improving the microstructure and functional characteristics of materials. Phases, grain boundaries, dislocations, and other flaws are examples of the microstructure, which is an essential component in defining the functional properties of a material, such as its electrical conductivity, mechanical strength, thermal stability, and resistance to corrosion. The production of materials with improved performance for a range of applications has been made possible by improvements in materials processing methods, such as sev
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8

Swarup, Kumar, Uzzaman Asif, Ibrahim Adam Md, and Biddut Kumar Sree. "A Comprehensive Review of Prospects and Challenges of Microstructure and Functional Properties of Materials." European Journal of Theoretical and Applied Sciences 3, no. 2 (2025): 356–70. https://doi.org/10.59324/ejtas.2025.3(2).31.

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This thorough analysis examines the opportunities and difficulties related to improving the microstructure and functional characteristics of materials. Phases, grain boundaries, dislocations, and other flaws are examples of the microstructure, which is an essential component in defining the functional properties of a material, such as its electrical conductivity, mechanical strength, thermal stability, and resistance to corrosion. The production of materials with improved performance for a range of applications has been made possible by improvements in materials processing methods, such as sev
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9

Jang, Seungsoo, Kyung Taek Bae, Dongyeon Kim, et al. "Microstructural Analysis of Solid Oxide Electrochemical Cells via 3D Reconstruction Using a FIB-SEM Dual Beam System." ECS Transactions 111, no. 6 (2023): 1265–69. http://dx.doi.org/10.1149/11106.1265ecst.

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Solid oxide electrochemical cells (SOCs) have attracted increasing attention as energy conversion devices due to their high efficiency. The microstructures of SOCs play a critical role in their electrochemical performance, however, characterizing them is challenging due to their heterogeneous microstructure. This paper describes a quantitative analysis of SOC microstructures via 3D reconstruction technique using a focused ion beam-scanning electron microscope (FIB-SEM) dual beam system. The reconstructed SOC electrodes offer microstructural characteristics, including particle and pore size, to
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10

Héripré, E., D. Caldemaison, A. Roos, and J. Crépin. "Microstrain Analysis of Titanium Aluminides." Materials Science Forum 638-642 (January 2010): 1330–35. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1330.

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The aeronautic and automotive industries have shown a renewed interest in TiAl based alloys. The main reasons for such an interest are their low density (~3,8g/cm3), a good stiffness and a high strength for temperatures up to 750°C. However, these alloys exhibit, in their polycrystalline form, a poor ductility at room temperature with widely scattered values. The aim of this study is therefore to characterise their mechanical behaviour with a multiscale methodology, coupling microstructure analysis and strain field measurements. This methodology employs orientation imaging microscopy as well a
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11

Kim, Tae Won. "Failure Analysis of Heterogeneous Microstructures in Ti-6Al-4V Alloy Using Probability Functions." Key Engineering Materials 297-300 (November 2005): 1852–57. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.1852.

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A stochastic approach has been presented for superplastic deformation of Ti-6Al-4V alloy, and probability functions are used to model the heterogeneous phase distributions. Experimentally observed spatial correlation functions are developed, and microstructural evolutions together with superplastic deformation behavior have been investigated by means of the probability functions. The strain-rate dependent failure strain can be correctly predicted by the model. As shown by the results the probability varies approximately linearly with separation distance, and significant deformation enhanced pr
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12

Kawa, Marek. "Failure Criterion for Brick Masonry: A Micro-Mechanics Approach." Studia Geotechnica et Mechanica 36, no. 3 (2015): 37–48. http://dx.doi.org/10.2478/sgem-2014-0025.

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Abstract The paper deals with the formulation of failure criterion for an in-plane loaded masonry. Using micro-mechanics approach the strength estimation for masonry microstructure with constituents obeying the Drucker-Prager criterion is determined numerically. The procedure invokes lower bound analysis: for assumed stress fields constructed within masonry periodic cell critical load is obtained as a solution of constrained optimization problem. The analysis is carried out for many different loading conditions at different orientations of bed joints. The performance of the approach is verifie
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13

Hu, Xiaobing, Jiajun Zhao, Yiming Chen, et al. "Structure-property modeling scheme based on optimized microstructural information by two-point statistics and principal component analysis." Journal of Materials Informatics 2, no. 1 (2022): 5. http://dx.doi.org/10.20517/jmi.2022.05.

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Construction of the structure-property (SP) relationship is an important tenet during materials development. Optimizing microstructural information is a necessary and challenging task in understanding and improving this linkage. To solve the problem that the experimental microstructures with a small size usually fail to represent the entire sample structure, a data-driven scheme integrating two-point statistics, principal component analysis, and machine learning was developed to reasonably construct a representative volume element (RVE) set from the small microstructures and extract optimized
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14

Sotsky A B., Ponkratov D. V., and Sotskaya L. I. "Fourier analysis of modes of microstructured optical fibers." Technical Physics 67, no. 12 (2022): 1653. http://dx.doi.org/10.21883/tp.2022.12.55202.156-22.

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An vectorial mode solver for microstructured optical fibers based on the representation of the longitudinal components of the mode fields at the interfaces of media in the fiber cross section by Fourier series in angular variables is formulated. The coefficients of the series are found from a homogeneous algebraic system solved by the reduction method. The matrix elements of the system are determined on the basis of the Green's theorem, which is considered in the internal and external regions of the fiber cross section and the inclusions that form the microstructure. The elements are represent
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15

James, R. D. "Microstructure of Shape-Memory and Magnetostrictive Materials." Applied Mechanics Reviews 43, no. 5S (1990): S189—S193. http://dx.doi.org/10.1115/1.3120802.

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Recent advances in the analysis of microstructure is providing models and methods for treating the kinds of optimization problems that arise in the study of microstructure. The main advance has been the development of theory and methods for treating the case in which arbitrary microstructures compete for the minimum (or maximum). This contrasts for example with micromechanics in which the geometry of the microstructure is assumed, or assumed up to the choice of a few parameters, and then the optimization or stress analysis is carried out under severe geometric restrictions. Micromechanics is e
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16

Dong, Qin, Zhong Wei Yin, Hu Lin Li, Yang Mao, and Geng Yuan Gao. "3D Reconstruction of Microstructure for Centrifugal Casting Babbitt Lining of Bimetallic Bearing Based on Mimics." Key Engineering Materials 841 (May 2020): 94–98. http://dx.doi.org/10.4028/www.scientific.net/kem.841.94.

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Babbitt alloys are the most commonly used bearing materials for low speed diesel engines due to their excellent attributes. An understanding of microstructures in these alloys is important, especially quantifying microstructure in 3D. In this study, we used serial sectioning technique to reconstruct 3D microstructure of tin-based Babbitt lining of bimetallic bearing made by centrifugal casting based on medical software Mimics. The morphologies and volume fraction of hard phase particles and α-Sn matrix were obtained. The volume fraction of the reconstructed microstructures was verified by the
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17

Ma, Yun Dong, and Shuang Liang. "Tunnel Lining Microstructure and Mechanical Properties of Evolutionary Analysis." Applied Mechanics and Materials 580-583 (July 2014): 1168–73. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.1168.

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For the tunnel lining microstructure, mechanical properties evolve analyzed. This paper have established and meshed microstructural model and got the situation under its force structure loads, the cracking strain as a criterion for its application fracture criterion to get a good cracking and expansion of the tunnel lining meso model. The results of the case under the macrostructure of the model compared with the microstructure results can get the adventage of the microstructure in using tunnel lining.
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18

Cong, Vu Chi. "Simplified approach for quantitative analysis of hardened concrete microstructure using autocorrelation function." Journal of Science and Technology in Civil Engineering (STCE) - HUCE 17, no. 4 (2023): 66–79. http://dx.doi.org/10.31814/stce.huce2023-17(4)-06.

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In this paper, the internal microstructures of three different concrete mixtures were investigated through digitalimage analysis procedure conducted on a set of 60 cross-sectional images of hardened concrete specimens.To quantitatively describe the geometry and spatial organization of all the components within the hardened concretes and measure the heterogeneity of different concrete mixtures and sample shapes, a two-dimensionalAutocorrelation Function (ACF) analysis program was performed on a series of 60 scanned images of internalcross-sectional images. This enabled us to define a correlatio
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19

Oehring, Michael, V. Küstner, Fritz Appel та Uwe Lorenz. "Analysis of the Solidification Microstructure of Multi- Component γ-TiAl Alloys". Materials Science Forum 539-543 (березень 2007): 1475–80. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1475.

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Gamma titanium aluminide alloys often solidify peritectically and show a coarse, dendritic microstructure, which can lead to unacceptable mechanical properties in the as-cast condition. In view of the development of improved cast alloys, the dependence of the solidifying microstructure on the aluminum content and other alloying elements was investigated. The formation of the observed solidification microstructures is discussed in comparison with microstructure formation maps calculated by the NCU (nucleation and constitutional undercooling) model developed by Hunziker et al. [1].
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20

Schneider, J., R. Rostami, M. Corcoran, and G. Korpala. "Integration of Artificial Intelligence into Metallography: Area-wide Analysis of Microstructural Components of a Jominy Sample." HTM Journal of Heat Treatment and Materials 79, no. 1 (2024): 3–14. http://dx.doi.org/10.1515/htm-2023-0032.

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Abstract Analysing the microstructure is an essential part of quality control in many steel manufacturing and processing operations. In this work, a promising method for autonomous analysis of microstructures in low-alloy steels based on artificial intelligence image analysis is presented. This study focuses on the classification of different microstructure components in metallographic images of steel microstructures using a Deep Convolutional Neural Network (DCNN) model. Since the accuracy of the model strongly depends on the size of the data set, a data set consisting of two million optical
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21

Ott, J., A. Burghardt, D. Britz, S. Majauskaite, and F. Mücklich. "Qualitative and Quantitative Microstructural Analysis of Copper for Sintering Process Optimization in Additive Manufacturing Applications." Practical Metallography 58, no. 1 (2021): 32–47. http://dx.doi.org/10.1515/pm-2020-0002.

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Abstract This work will present possibilities for the characterization of copper powder green bodies and sintered copper microstructures during pressureless sintering. The introduction of new parameters to microstructural characterization based on qualitative and quantitative microstructural analysis will facilitate the systematic optimization of the sintering process. As a result of the specific evaluation of the microstructure evolution, conventional isothermal sintering could be successfully replaced by multi-step temperature profiles, thus achieving sintering densities of more than 99 % by
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22

Zhang, Xiaodan, Niels Leergaard Pedersen, Peder Klit, and Dorte Juul Jensen. "Heterogeneous microstructure and failure analysis of yaw gear rings." IOP Conference Series: Materials Science and Engineering 1249, no. 1 (2022): 012055. http://dx.doi.org/10.1088/1757-899x/1249/1/012055.

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Abstract The microstructure and hardness of two cracked and failed steel (42CrMo4) teeth from two different yaw rings have been investigated. It is shown that the surface quenching and tempering treatments introduce heterogeneous microstructures with a low-temperature tempered hard martensite surface layer and a high-temperature tempered matrix. This is common to both teeth, however, the gradient microstructure and hardness are different for these two yaw rings. It is suggested that this difference in gradient strongly affects cracking and failure. The failure mechanisms for the two teeth are
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23

Strzelecki, Piotr Jan, Anna Świerczewska, Katarzyna Kopczewska, Adam Fheed, Jacek Tarasiuk, and Sebastian Wroński. "Decoding Rocks: An Assessment of Geomaterial Microstructure Using X-ray Microtomography, Image Analysis and Multivariate Statistics." Materials 14, no. 12 (2021): 3266. http://dx.doi.org/10.3390/ma14123266.

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An understanding of the microstructure of geomaterials such as rocks is fundamental in the evaluation of their functional properties, as well as the decryption of their geological history. We present a semi-automated statistical protocol for a complex 3D characterization of the microstructure of granular materials, including the clustering of grains and a description of their chemical composition, size, shape, and spatial properties with 44 unique parameters. The approach consists of an X-ray microtomographic image processing procedure, followed by measurements using image analysis and statist
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24

Kim, Young Ho, Jeong-Woo Sohn, Youngjae Woo, et al. "Preparation of Microstructure Molds of Montmorillonite/Polyethylene Glycol Diacrylate and Multi-Walled Carbon Nanotube/Polyethylene Glycol Diacrylate Nanocomposites for Miniaturized Device Applications." Journal of Nanoscience and Nanotechnology 15, no. 10 (2015): 7860–65. http://dx.doi.org/10.1166/jnn.2015.11224.

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Environmentally friendly microstructure molds with montmorillonite (MMT) or multi-walled carbon nanotube (MWCNT) reinforced polyethylene glycol diacrylate (PEGDA) nanocomposites have been prepared for miniaturized device applications. The micropatterning of MMT/PEGDA and MWCNT/PEGDA with 0.5 to 2.0 wt% of MMTs and MWCNTs was achieved through a UV curing process with micro-patterned masks. Hexagonal dot arrays and complex patterns for microstructures of the nanocomposites were produced and characterized with an optical microscope; their thermal properties were studied by thermogravimetric analy
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25

Dahmen, U., N. Thangaraj, and R. Kilaas. "Quantitative TEM analysis of microstructural anisotropy." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 682–83. http://dx.doi.org/10.1017/s0424820100171146.

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Preferred orientation of grain boundaries or interfaces in solids is an important indicator of anisotropy in boundary energy or kinetics. The present study is part of an ongoing investigation of faceting in thin films with the mazed bicrystal microstructure which possesses several unique features that are difficult to measure with standard parameters such as grain size distribution. One of the important characteristics of this microstructure is the degree and type of anisotropy. Figure 1 shows a micrograph with a typical mazed bicrystal microstructure. Only two grain orientations with about eq
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26

Ostad Shabani, Mohsen, Amir Baghani, Mohammad Reza Rahimipour, Mansour Razavi, Mohammad Zakeri, and Fatemeh Heydari. "Effect of temperature, time, and shear force on the morphology and size of dendrites in A356-Al2O3 composites." Journal of Composite Materials 56, no. 2 (2021): 329–38. http://dx.doi.org/10.1177/00219983211052602.

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Dendrite arm spacing (DAS) plays a vital role in determining mechanical properties of aluminum casting composites. In this study, the effects of three different methods of gravity sand casting, squeeze casting, and semi-solid compo-casting with different electromagnetic stirring currents and times on the microstructural morphology of A356-Al2O3 composites were investigated. In order to investigate effects of shear forces on the formation of the globular-like structure, samples with different stirring electric current and times were produced by compo-casting in semi-solid state and analyzed. Op
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27

Chen, Ge Xin, Hong Xiao, and Yu Ming Fu. "The Analysis of Aluminum Alloy Microstructure Changes in Strong Alternating Magnetic Field." Advanced Materials Research 298 (July 2011): 262–66. http://dx.doi.org/10.4028/www.scientific.net/amr.298.262.

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The change of aluminum alloy microstructure before and after strong alternating magnetic treatment in the aluminum alloy LY12 after the thermal plastic figuration is studied in experimental ways using strong alternating magnetic field generator.By comparing microstructure before and after strong alternating magnetic treatment, the changes of microstructure component organization is analyzed to make further analysis of the organizational factors that leads to aluminum alloy LY12 microstructure’s refinement after thermal plastic figuration caused by alternating magnetic field.
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28

YEOM, JONG-TAEK, JEOUNG HAN KIM, JAE-KEUN HONG, NHO-KWANG PARK, and CHONG SOO LEE. "INFLUENCE OF INITIAL MICROSTRUCTURE ON HOT WORKABILITY OF Ti-6Al-4V ALLOY." International Journal of Modern Physics B 23, no. 06n07 (2009): 808–13. http://dx.doi.org/10.1142/s0217979209060063.

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Hot workability of Ti -6 Al -4 V alloy with different initial microstructures was investigated by considering processing maps and the dynamic material deformation behavior. The emphasis has been focused on the effect of initial microstructure (equiaxed versus bimodal structure). Process maps were generated using the dynamic material model (DMM), unifying the relationships between constitutive deformation behavior, hot workability and microstructures evolution. Also, the flow instability was investigated using the various flow instability criteria and microstructural analysis. To establish the
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29

Pham, Gia Khanh, Kerim Yalcin, Azman Wan Asma Najihah Binti Wan, Anh Son Nguyen, and Van Trung Trinh. "Development of an Open-Source Software Tool for Microstructure Analysis of Materials Using Artificial Intelligence." Key Engineering Materials 1004 (December 23, 2024): 103–10. https://doi.org/10.4028/p-vcog1h.

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Investigating the microstructures of materials with microscopy is a key task in quality assurance, the development of new materials, and the optimization of manufacturing processes. However, conventional image analysis often demands significant time for analysis and a large volume of images, and the predictions produced are commonly constrained. Applying deep learning, models can be trained to analyze material microstructures quickly and with greater accuracy. The objective of this study is to provide a method for the automatic segmentation of microstructural images obtained from microscopes o
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30

Zhang, Xinyu, Chuanwei Li, and Jianfeng Gu. "The Effect of Al Loss on the Microstructural Formation of TiAl Alloys Produced via Direct Laser Deposition." Metals 15, no. 4 (2025): 391. https://doi.org/10.3390/met15040391.

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Additive manufacturing is becoming a popular and effective process for lightweight high-temperature TiAl alloys, but there is a lack of understanding regarding the corresponding microstructural formation mechanisms. In this study, various Ti-47Al-2Cr-2Nb alloys were additively manufactured with different laser power values, and the related microstructures were carefully characterized. The results show that a convoluted microstructure, a nearly full α2/γ lamellar structure, and an α2/β Widmanstatten structure were obtained as the laser power was increased. Moreover, the Al content of the as-dep
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Santos, Dagoberto Brandão, Élida G. Neves, and Elena V. Pereloma. "Effect of Processing Route on Mechanical Behavior of C-Mn Multiphase High Strength Cold Rolled Steel." Materials Science Forum 539-543 (March 2007): 4375–80. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.4375.

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The multiphase steels have complex microstructures containing polygonal ferrite, martensite, bainite, carbide and a small amount of retained austenite. This microstructure provides these steels with a high mechanical strength and good ductility. Different thermal cycles were simulated in the laboratory in order to create the microstructures with improved mechanical properties. The samples were heated to various annealing temperatures (740, 760 or 780°C), held for 300 s, and then quickly cooled to 600 or 500°C, where they were soaked for another 300 s and then submitted to the accelerated cooli
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32

Brenneis, Willa, Qingsong Liu, Jeffrey J. Richards, and Jeffrey Lopez. "Advancing Lithium-Ion Battery Manufacturing Sustainability through Microstructural Analysis of Composite Cathodes." ECS Meeting Abstracts MA2024-02, no. 67 (2024): 4407. https://doi.org/10.1149/ma2024-02674407mtgabs.

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To accelerate electric vehicle (EV) adoption and mitigate transportation emissions, lithium-ion battery (LIB) energy density and rate capability must be improved, advancing EV range and charging speed, respectively. The composite cathode is a major driver of these performance metrics, as its microstructure governs the flow of ions and electrons.1 Intentionally engineering cathode microstructure for efficient ionic transport will enable fast charging, thick cathodes for increased cell energy density. Here, while focusing our efforts on cathode design, we have the opportunity to prioritize susta
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Chen, Ming, Xiaodong Hu, Hongyang Zhao, and Dongying Ju. "Recrystallization Microstructure Prediction of a Hot-Rolled AZ31 Magnesium Alloy Sheet by Using the Cellular Automata Method." Mathematical Problems in Engineering 2019 (September 16, 2019): 1–15. http://dx.doi.org/10.1155/2019/1484098.

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A large reduction rolling process was used to obtain complete dynamic recrystallization (DRX) microstructures with fine recrystallization grains. Based on the hyperbolic sinusoidal equation that included an Arrhenius term, a constitutive model of flow stress was established for the unidirectional solidification sheet of AZ31 magnesium alloy. Furthermore, discretized by the cellular automata (CA) method, a real-time nucleation equation coupled flow stress was developed for the numerical simulation of the microstructural evolution during DRX. The stress and strain results of finite element analy
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34

Dehghanpour, Hamid Reza, Parviz Parvin, Seyedeh Zahra Mortazavi, Ali Reyhani, Amin Chegenizadeh, and Mohammadreza Aghaei. "Analysis of Surface Texturing of Silicon with Surface Regular Microstructure Using C Method." Energies 15, no. 20 (2022): 7540. http://dx.doi.org/10.3390/en15207540.

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Silicon, as the most abundant element in the earth’s crust and the most common material used in electronic and optical equipment, has attracted the attention of many individuals to change the properties of this material, improving its electronic and optical properties. One of these efforts relies on the reduction of surface reflection by making use of different methods. However, among them, the use of lasers in creating surface microstructures has been of special importance because there is no need for masks and other additional materials. In this work, a theoretical method is utilized to anal
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Conti, Sergio, Benedict Geihe, Martin Lenz, and Martin Rumpf. "A posteriori modeling error estimates in the optimization of two-scale elastic composite materials." ESAIM: Mathematical Modelling and Numerical Analysis 52, no. 4 (2018): 1457–76. http://dx.doi.org/10.1051/m2an/2017004.

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The a posteriori analysis of the discretization error and the modeling error is studied for a compliance cost functional in the context of the optimization of composite elastic materials and a two-scale linearized elasticity model. A mechanically simple, parametrized microscopic supporting structure is chosen and the parameters describing the structure are determined minimizing the compliance objective. An a posteriori error estimate is derived which includes the modeling error caused by the replacement of a nested laminate microstructure by this considerably simpler microstructure. Indeed, ne
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Welzel, Udo, and Eric J. Mittemeijer. "The analysis of homogeneously and inhomogeneously anisotropic microstructures by X-ray diffraction." Powder Diffraction 20, no. 4 (2005): 376–92. http://dx.doi.org/10.1154/1.2138066.

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The microstructure of materials is generally, macroscopically, anisotropic and/or inhomogeneous. Traditional diffraction analyses do not take into account this anisotropy and/or inhomogeneity of microstructural features. Thus obtained results can be incomplete, ambiguous, or even erroneous. In this work instrumental requirements (application of parallel beam diffractometers with X-ray lenses or X-ray mirrors and parallel-plate collimators in the laboratory and at synchrotron beam lines) and methodological approaches for the diffraction analysis of anisotropic and inhomogeneous microstructures
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Hamidpour, Pouria, Alireza Araee, Majid Baniassadi, and Hamid Garmestani. "Multiphase Reconstruction of Heterogamous Materials Using Machine Learning and Quality of Connection Function." Materials 17, no. 13 (2024): 3049. http://dx.doi.org/10.3390/ma17133049.

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Establishing accurate structure–property linkages and precise phase volume accuracy in 3D microstructure reconstruction of materials remains challenging, particularly with limited samples. This paper presents an optimized method for reconstructing 3D microstructures of various materials, including isotropic and anisotropic types with two and three phases, using convolutional occupancy networks and point clouds from inner layers of the microstructure. The method emphasizes precise phase representation and compatibility with point cloud data. A stage within the Quality of Connection Function (QC
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Timotijević, Milica, Olivera Erić-Cekić, Dragan Rajnović, and Petar Janatović. "Microstructural analysis of a HP 40Nb alloy aged." Engineering Today 1, no. 3 (2022): 41–47. http://dx.doi.org/10.5937/engtoday2203041t.

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In this paper, the change in the microstructure of the centrifugally cast heat-resistant alloys of HP40 Nb after exposure to 0.5h and 2h of ageing times at 1123K and 1323K were investigated. The microstructures of the as-received alloy and aged conditions were examined using light microscopy (LM) and scanning electron microscopy (SEM) equipped with an energy dispersive spectroscopy (EDS). The chemical composition of various phases and precipitates observed in the aged sample microstructure was characterized by the means of scanning electron microscopy SEM via backscattered electron (BSE). The
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Pinheiro, Bruno C. A., and J. N. F. Holanda. "Microstructural Analysis of Petroleum Waste Containing Ceramic Tile." Materials Science Forum 591-593 (August 2008): 845–48. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.845.

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In this work is done a study on the sintered microstructure of ceramic tile paste incorporated with petroleum waste. The raw materials used were kaolin, sodic feldspar, quartz and petroleum waste. The ceramic tiles containing up to 5 wt% petroleum waste were prepared by uniaxial pressing and sintered at 1200°C. The microstructural evolution was examined by SEM. In addition, water absorption, linear shrinkage, and sintered density were determined. The results showed that the microstructure of the ceramic tiles is influenced by the added petroleum waste.
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40

Wehner, Luzie, Christian Lenser, Krzysztof Dzieciol, Egbert Wessel, Jürgen Malzbender, and Ruth Schwaiger. "Three-Dimensional Microstructural Analysis for the Characterization of Failure Mechanisms of a Novel SOEC." ECS Meeting Abstracts MA2023-01, no. 54 (2023): 34. http://dx.doi.org/10.1149/ma2023-015434mtgabs.

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A novel Ni-GDC-cermet-supported intermediate temperature electrolysis cell that has been developed as promising candidate for hydrogen production with GDC as electrolyte, YSZ as electron-blocking layer and an additional GDC diffusion-blocking layer is characterized. Although this three-layer GDC-YSZ-GDC electrolyte enables improved performance compared to state-of-the-art YSZ electrolyte-based cells especially at lower operation temperatures, at temperatures below 750 °C and high electrolysis currents a voltage drop and subsequently crack formation in the three-layer electrolyte was observed i
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Moayedi, H., S. Kazemian, and A. H. Vakili. "The Surface Electrical and Microstructure Analysis of Peat Treated with Cement." Advanced Materials Research 629 (December 2012): 455–60. http://dx.doi.org/10.4028/www.scientific.net/amr.629.455.

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Peat usually undergo large secondary settlements depending on the amount of organic content present in the soil. This is because of its special microstructure. The microstructure of peat has interdependence with mechanical and physical characteristics, such as compressive and tensile strength, and water retention. In the present research, peat samples were admixed with different concentrations of cement to enhance its physical, chemical, electrical, and microstructural properties. As a result, the surface electrical of the peat colloids influence the rate of flocculation, and in turn further s
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42

Bhakar, Ashok, Pooja Gupta, P. N. Rao, et al. "Line profile analysis of synchrotron X-ray diffraction data of iron powder with bimodal microstructural profile parameters." Journal of Applied Crystallography 54, no. 2 (2021): 498–512. http://dx.doi.org/10.1107/s1600576721000601.

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Room-temperature synchrotron X-ray diffraction and subsequent detailed line profile analysis of Fe powder were performed for microstructural characterization. The peak shapes of the diffraction pattern of Fe were found to be super-Lorentzian in nature and the peak widths were anisotropically broadened. These peak profile features of the diffraction pattern are related to the microstructural parameters of the material. In order to elucidate these features of the diffraction pattern, detailed line (peak) profile analyses were performed using the Rietveld method, modified Williamson–Hall plots an
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Chao, Long Sun, Yu Ru Chen, and Fang Chun Wang. "Experimental Analysis of Seed Effect on the Directional Solidification of Sn-Pb Alloy." Materials Science Forum 704-705 (December 2011): 343–47. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.343.

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In this paper, an experiment model for the directional solidification of Lead/Tin alloy is built and the effects of different-shape seeds on the microstructures on the solidification microstructure are investigated. In a casting process, the temperature and concentration fields will affect the microstructures of materials and this influence is the key point of improving their mechanical and physical properties. It is not easy to control the morphology of solidifying microstructures. The scheme of directional solidification can make the microstructures grow along a fixed direction and it is als
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Jędrysiak, Jarosław, and Magda Kaźmierczak-Sobińska. "Theoretical Analysis of Buckling for Functionally Graded Thin Plates with Microstructure Resting on an Elastic Foundation." Materials 13, no. 18 (2020): 4031. http://dx.doi.org/10.3390/ma13184031.

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In this paper, the problem of the stability of functionally graded thin plates with a microstructure is presented. To analyse this problem and take into consideration the effect of microstructure, tolerance modelling is used. The tolerance averaging technique allows us to replace the equation with non-continuous, tolerance-periodic, highly oscillating coefficients of the system of differential equations with slowly-varying coefficients, which describes also the effect of the microstructure. As an example, the buckling of a microstructured functionally graded plate band on a foundation is inves
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Zhao, Dongfu, Penghe Jia, Pingying Hou, Huixuan Liu, Rundong Zhao, and Haijing Gao. "Microstructural analysis to uniaxial low cyclic compression of high-strength concrete after high temperature." Advances in Structural Engineering 22, no. 3 (2018): 779–91. http://dx.doi.org/10.1177/1369433218800205.

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The uniaxial compressive cycling tests of high-strength concrete after high temperature under different stress were carried out using the electrohydraulic servo-controlled fatigue testing system. The investigation focused on low-cycle fatigue to figure out the relationship between microstructural development and number of cycles. The variation in microstructure during uniaxial compressive fatigue process was systematically analyzed and compared using ultrasonic, micro-hardness test, mercury intrusion porosimetry, and scanning electron microscopy. It is found that at the same life ratio, the cu
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Palevicius, Arvydas, and Giedrius Janusas. "Analysis of Periodical Microstructures Using Optical Methods." Advanced Materials Research 433-440 (January 2012): 2021–28. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.2021.

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In this work we present an optical laser based method for characterization of periodical microstructure. It allows indirect evaluation of geometrical and optical parameters of periodical microstructures. Proposed method is applicable for optimization and control of technological processes in the cases when traditional measurement techniques are not suitable. The main experimental results are compared with the computer simulations where the standard programs PCGrate-SX6.0 and and GSolver V4.20b were employed. Error of estimation of geometrical parameters of periodical microstructures by compari
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Zhang, Qiushu, Bei Peng, Mengqi Chu, Pan Wen, Song Wang, and Jintao Xu. "Curved Film Microstructure Arrays Fabricated via Mechanical Stretching." Micromachines 12, no. 11 (2021): 1281. http://dx.doi.org/10.3390/mi12111281.

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We report on curved film microstructure arrays fabricated through polydimethylsiloxane (PDMS) film buckling induced by mechanical stretching. In the process of the microstructure preparation, a PDMA film is glued on a bidirectionally prestretched PDMS sheet that has a square distributed hole array on its surface. After releasing the prestrain, the film microstructure array is created spontaneously. The fabricated microstructures possess a spherical surface and demonstrate very good uniformity. The film microstructure arrays can serve as microlens arrays with a focal length of 1010 μm. The micr
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Mishnaevsky, Leon. "Computational Analysis of the Effects of Microstructures on Damage and Fracture in Heterogeneous Materials." Key Engineering Materials 306-308 (March 2006): 489–94. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.489.

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3D FE (finite element) simulations of the deformation and damage evolution of particle reinforced composites are carried out for different microstructures of the composites. Several new methods and programs for the automatic reconstruction of 3D microstructures of composites on the basis of the geometrical description of microstructures as well as on the basis of the voxel array data have been developed and tested. Different methods of reconstruction and generation of finite element models of 3D microstructures of composite materials (geometry-based and voxel array based) are discussed and com
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Dahal, Bhim Kumar, and Jun Jie Zheng. "Comprehensive analysis of cement-stabilised dredged marine soil: Evaluating physical, microstructural, and mechanical characteristics." Ministry of Science and Technology, Vietnam 66, no. 2 (2024): 52–60. http://dx.doi.org/10.31276/vjste.66(2).52-60.

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This study evaluates the index, microstructural, and mechanical behaviour of cement-stabilised soft soil. The marine soil dredged from Hangzhou is taken for the study. Different percentages of ordinary Portland cement (OPC)by dry mass were added to the soils during reconstitution, i.e., 5, 10, 15, and 20%. The reconstituted samples were analysed in the laboratory to determine basic properties such as moisture content, void ratio, density, specific gravity, consistency limits, and particle size distribution. The microstructures of the reconstituted samples were also evaluated through scanning e
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Vasylyev, M. O., B. M. Mordyuk, S. M. Voloshko, and P. O. Gurin. "Microstructure of Co–Cr Dental Alloys Manufactured by Casting and 3D Selective Laser Melting." Progress in Physics of Metals 23, no. 2 (2022): 337–59. http://dx.doi.org/10.15407/ufm.23.02.337.

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The review analyses the microstructure of the commercial Co–Cr–(Mo, W) dental alloys fabricated by 3D digital selective laser melting (SLM), which is the most promising technique among the emerging additive fabrication technologies used for metal products manufacturing in dentistry. In this regard, the main goal is to compare the microstructures of the metal dental products produced by two currently used technologies, namely, conventional casting and SLM. We consider the latest research published from 2013 to 2022. The microstructures are evaluated using optical microscopy (OM), scanning elect
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