Bibliographies thématiques / Microstructure and Characterization

Littérature scientifique sur le sujet « Microstructure and Characterization »

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Publié le 7 septembre 2023

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Articles de revues sur le sujet "Microstructure and Characterization"

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Lannutti, J. J. « Characterization and Control of Compact Microstructure ». MRS Bulletin 22, no 12 (décembre 1997) : 38–44. http://dx.doi.org/10.1557/s0883769400034734.

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The microstructure and properties of a ceramic component are largely predetermined by the processes and process controls used to manufacture them. The metric for success in manufacturing is often based on gross density. For example, optimizing pressure-density response, maximizing overall density, and minimizing springback and delaminations in powder pressing all focus on characterization and control of the overall (macroscopic) state of a powder compact. Unfortunately this focus on macroscopic effects has contributed to a general neglect of the compact at the microstructural level. Process-control variables in powder compaction have been defined and discussed by many workers, but their quantitative application to predict and control compaction behavior is limited. Advances in characterization technology and computer modeling now allow us to quantitatively characterize and simulate microstructures more easily. These and other tools can help provide the scientific and technological foundation necessary to predict and control microstructure and microstructural evolution during processing.
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Lomholt, Trine C., Yoshitaka Adachi, Jeremy Peterson, Russell Steel, Karen Pantleon et Marcel A. J. Somers. « Microstructure Characterization of Friction Stir Spot Welded TRIP Steel ». Advanced Materials Research 409 (novembre 2011) : 275–80. http://dx.doi.org/10.4028/www.scientific.net/amr.409.275.

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Transformation Induced Plasticity (TRIP) steels have not yet been successfully joined by any welding technique. It is desirable to search for a suitable welding technique that opens up for full usability of TRIP steels. In this study, the potential of joining TRIP steel with Friction Stir Spot Welding (FSSW) is investigated. The aim of the study is to investigate whether acceptable welds can be produced, and additionally, to obtain an understanding of the microstructural changes during welding. The microstructure was investigated with a combination of microscopical techniques with the aim of identifying the transformations occurring during welding. Reflected light microscopy, scanning electron microscopy, and electron backscatter diffraction were among the methods applied for detailed investigations. The microstructure adjacent to the welds can generally be subdivided in two thermo-mechanically affected zones (TMAZ), and two heat-affected zones (HAZ). The dual behavior of the microstructure in the zones is related to the two transition temperatures in steel: A1 and A3. In parts of the TMAZ the microstructure contains ultra fine-grained ferrite. This finding parallels the observation in thermo-mechanically processed steels, where severe deformation at elevated temperatures is used to produce ultra fine-grained microstructures. Several possible transformation mechanisms could in principle explain the development of ultra fine-grained ferrite, e.g. dynamic recrystallization, strain-induced ferrite transformation and dynamic recovery.
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Dong, Qin, Zhong Wei Yin, Hu Lin Li, Yang Mao et Geng Yuan Gao. « 3D Reconstruction of Microstructure for Centrifugal Casting Babbitt Lining of Bimetallic Bearing Based on Mimics ». Key Engineering Materials 841 (mai 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 area fraction of the metallographic sections, which proved a higher reliability of 3D reconstruction. The results of 3D microstructural characterization and analysis will enable a comprehensive understanding the structure–property relationships of these materials.
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Han, Xiaobing, Jie Gao, Tao Chen, Libing Qian, Houhua Xiong et Zhiyuan Chen. « Application Progress of PALS in the Correlation of Structure and Properties for Graphene/Polymer Nanocomposites ». Nanomaterials 12, no 23 (24 novembre 2022) : 4161. http://dx.doi.org/10.3390/nano12234161.

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Giving a deep insight into the microstructure, and realizing the correlation between microstructure and properties is very important to the precise construction of high-performance graphene/polymer nanocomposites (GPN). For the promising application in microstructure characterization, much attention has been focused on the effective technique of positron annihilation lifetime spectroscopy (PALS). Based on the introduction of the basic principle, this review summarized the application progress of PALS in the correlation of microstructure and properties for GPN, especially for the characterization of free volume and interfacial interaction, and the correlation of these microstructures and properties.
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Baker, Ian. « Exploring the Microstructure of Ice ». AM&P Technical Articles 176, no 1 (1 janvier 2018) : 27–30. http://dx.doi.org/10.31399/asm.amp.2018-01.p027.

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Abstract Characterizing ice and snow is important not only for building accurate climate models, but also for activities such as relating the mechanical properties of sea ice to its microstructure so that the interaction of ice with ships and structures can be better understood. This article describes the microstructural characterization of ice. Many microstructural characterization techniques that can be applied to other materials also can be used to examine ice.
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Ott, J., A. Burghardt, D. Britz, S. Majauskaite et F. Mücklich. « Qualitative and Quantitative Microstructural Analysis of Copper for Sintering Process Optimization in Additive Manufacturing Applications ». Practical Metallography 58, no 1 (1 janvier 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 simultaneously reducing process time. This systematic optimization of the sintering process of Cu through specific microstructural analysis may now be applied to sinter-based manufacturing technologies such as Binder Jetting and Metal Powder Injection Moulding, enabling the manufacture of complex and highly conductive Cu parts for applications in electronics.
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Vurobi, Selauco, Thiago Ferreira de Andrade et Osvaldo Mitsuyuki Cintho. « Utilization of Color Metallography in Characterization of a Modified SAE 4118H Steel Submitted to Isothermal Treatments ». Materials Science Forum 805 (septembre 2014) : 242–47. http://dx.doi.org/10.4028/www.scientific.net/msf.805.242.

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A modified SAE 4118H steel was subjected to isothermal treatments between 700 °C and 400 oC every 50 °C range, with the intention of evaluating the decomposition of austenite at constant temperature. It was varied time of stay in the isothermal treatment between 15 and 28800 seconds depending on the treatment temperature. After each isothermal treatment and standard metallographic preparation, the samples were etched with color metallography reagents for revealing the microstructure obtained. At temperatures of 700oC to 550°C the steel showed microstructure composed of ferrite and pearlite. Between 500oC and 400°C bainitic microstructure was quickly formed. The reduction of treatment temperature provided finer microstructures, which increased the hardness of steel. With the use of color metallography reagents, excellent contrast for determining the volume fraction of microstructural constituents formed isothermally was obtained, helping the study of isothermal decomposition of austenite.
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Průcha, Vojtěch, Zdeněk Jansa, Jiří Šimeček, Ondřej Žďánský et Antonín Kříž. « Characterization of Microstructure of Hadfield Steel ». Solid State Phenomena 270 (novembre 2017) : 265–70. http://dx.doi.org/10.4028/www.scientific.net/ssp.270.265.

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In this contribution, the preparation of metallographic sections and characterization of the microstructure of manganese Hadfield steels are discussed. The purpose of this paper is to provide information relevant to microstructural characterization of these steels. This type of steel is characterized by high resistance to abrasive wear, which is provided by surface strengthening through strain-induced martensitic transformation. Strengthening complicates the preparation of metallographic sections because the final microstructure can be influenced by the process and it can be eventually misinterpreted. Great attention must be paid to the choice of the etchant and the etching procedure. This contribution describes the entire metallographic characterization procedure, including the evaluation of grain size, micro-cleanness and presence of carbides on grain boundaries. It provides information for manufacturers and those, whose process and examine Hadfield steels with respect to their processing routes, wear resistance, non-magnetic properties and other aspects.
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Salomonsson, Kent, et Anders E. W. Jarfors. « Three-Dimensional Microstructural Characterization of Cast Iron Alloys for Numerical Analyses ». Materials Science Forum 925 (juin 2018) : 427–35. http://dx.doi.org/10.4028/www.scientific.net/msf.925.427.

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In this paper, we aim at characterizing three different cast iron alloys and their microstructural features, namely lamellar, compacted and nodular graphite iron. The characterization of microscopic features is essential for the development of methods to optimize the behavior of cast iron alloys; e.g. maximize thermal dissipation and/or maximize ductility while maintaining strength. The variation of these properties is commonly analyzed by metallography on two-dimensional representations of the alloy. However, more precise estimates of the morphologies and material characteristics is obtained by three-dimensional reconstruction of microstructures. The use of X-ray microtomography provides an excellent tool to generate high resolution three-dimensional microstructure images. The characteristics of the graphite constituent in the microstructure, including the size, shape and connectivity, were analyzed for the different cast iron alloys. It was observed that the lamellar and compacted graphite iron alloys have relatively large connected graphite morphologies, as opposed to ductile iron where the graphite is present as nodules. The results of the characterization for the different alloys were ultimately used to generate finite element models.
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Zhang, Fan, Andrew Allen, Lyle Levine, Gabrielle Long, Jan Ilavsky, Joshua Hammons et Pete Jemian. « In Situ Materials Characterization across Atomic and Microstructure Lengthscales ». Acta Crystallographica Section A Foundations and Advances 70, a1 (5 août 2014) : C1072. http://dx.doi.org/10.1107/s205327331408927x.

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Advanced materials exhibit complex, hierarchical, and multiscale microstructures that control their performance. Today, optimization of these microstructures requires iterative, ex situ studies using multiple independent instruments with different samples. To address many of the grand challenges facing the material research community, it is desirable to correlate material performance under realistic processing and operating conditions with in situ characterization of material structures across atomic and microstructural length scales. To meet this need, we have made progress in recent years in developing a suite of materials-measurement techniques that combines ultra-small angle X-ray scattering, small-angle X-ray scattering, X-ray diffraction, X-ray photon correlation spectroscopy, and X-ray imaging. When making use of high energy x rays from a third generation synchrotron source, this combined suite of techniques not only enables investigation of thick, complex materials under real operating/ processing conditions, but also allows robust structural characterization over 7 decades of structural and microstructural feature sizes, from sub-angstrom to millimeters. Depending on the scattering characteristics of the material, it can cover an unprecedented 11 decades in scattering intensity. This arrangement also allows the combination of measurement techniques be determined solely by the user's needs, allowing an unparalleled flexibility in addressing any set of microstructure, structure and dynamics material-measurement requirements. In this presentation, we will focus on various considerations required to make this combined technique possible, and use data from a series of in situ studies of aluminum alloys as examples to demonstrate the unique capability of this instrument. We will also discuss the potential impact that multi-bend achromat lattice, a concept being embraced by the worldwide synchrotron community, has on this technique.
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Thèses sur le sujet "Microstructure and Characterization"

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DeCost, Brian L. « Microstructure Representations : Applied Computer Vision Methods for Microstructure Characterization ». Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/764.

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Recent advances in computing power and automated microstructural image acquisition have opened the doors to data-driven quantitative microstructure analysis. Extraction of salient microstructure features is a crucial enabling component in this rapidly developing field of research; in the past decade the computer vision community has made enormous progress in this area, much of which has gone relatively unexplored by the quantitative microstructure analysis community. This dissertation explores applications of image texture recognition algorithms to engineer efficiently computable generic microstructure descriptors, enabling quantitative microstructure comparisons between and across a wide variety of materials systems. The literature review serves as a broad, high-level introduction for the materials scientist to some of the major themes in image recognition, along with some brief discussion of their relationship to contemporary microstructure science. After establishing that these image texture recognition algorithms can be effectively applied to classify diverse microstructure datasets, I begin to explore novel materials science applications. These include characterization and qualification of powder materials, exploratory analysis of large microstructure datasets, and extraction of quantitative relationships between materials processing and properties metadata and microstructural image features. The fusion of microstructure image analysis and contemporary machine vision techniques will facilitate development of robust autonomous microscopy systems, and may support quantitative engineering standards for complex hierarchical microstructure systems.
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Yamoah, Nana Kwame Gyan. « Microstructure Characterization of SUS444 Ferritic Stainless Steel ». Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23253.

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Redesigning heavy components with thinner components is one way to lower automotive weight and improve fuel efficiency. Therefore, replacing thick cast iron exhaust manifolds with thinner heat resistant stainless steel one is a prime example of this approach. Material for a thin exhaust manifold must tolerate cyclic thermal fatigue. In SUS 444, this characteristic is directly related to the influence of microstructure on high temperature strength and the stability of the microstructure at the high operating temperature range. The goal of this research is to identify the cause for the drastic difference in the stress-strain behavior between two potential manufacturer heat treatments that will serve as a simplified model case for high temperature cyclic fatigue.  Transmission electron microscopy (TEM) based microstructure analyses of samples which have been aged at 750"C for 100 hours and then hot-tensile tested at 750"C with a strain rate of   suggest continuous recrystallization as the mechanism responsible for the stable high temperature strength. The initial high temperature strength observed in the unaged sample was due to the precipitation of fine Laves phases which pinned down the motion of dislocations. As deformation progressed the strength increased until a critical precipitate size, volume fraction and dislocation density before Laves phases begun to rapidly coarsen and resulted in the abrupt decrease in strength. Microstructure evidence suggests the absence of precipitation strengthening effect in the aged samples could be a contributing factor to the decrease in peak strength between the aged samples and the unaged samples.
Master of Science
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Song, Hyeyun. « Multi-scale Microstructure Characterization for Improved Understanding of Microstructure-Property Relationship in Additive Manufacturing ». The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480349872328654.

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Yu, Miao. « Separation mechanisms and microstructure characterization of zeolite membranes ». Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3256404.

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Pathange, Lakshmi Prasad. « Characterization of protein microstructure by various chromatographic techniques ». Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/26851.

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Due to the rising health care costs and with the advent of biogenerics, there is a growing demand to develop new and reliable techniques to characterize proteins and biopharmaceuticals. In addition, characterization aids in understanding the intricate relationship between a protein's structure and its function. To address this challenge, two protein structural parameters, 1) amino acid surface area and 2) amino acid microstructure, were chosen to be investigated. Two chromatographic techniques, 1) ion exchange chromatography (IEC) and 2) immobilized metal affinity chromatography (IMAC), were used to characterize the above-mentioned protein structure parameters. The model protein chosen for our work is T4 lysozyme. The protein consists of 164 amino acids with molecular weight ~ 18 kD. SYBYL 7.1 software was used to generate in silico point mutants. Two categories of protein variants (point mutants) were generated using site-directed protein mutagenesis. The goal for generating point mutants was to obtain mutants that vary in the two structural parameters. The first category point mutants vary in the surface accessibility of a surface accessible histidine residue. The second category point mutants predominantly vary in protein net charge and the amino acid microstructure. In total, seventeen point mutants were generated: 1) category I consists of seven variants that vary predominantly in their histidine surface accessibility, and were obtained by replacing a charged amino acid residue at different locations on the surface of the protein molecule, and 2) category II consists of ten variants that vary in both net charge and charge distribution were obtained by replacing charged and neutral amino acid residues at different locations (different microenvironments) on the protein surface. PCR technique was used to generate the point mutants. Gene and protein sequencing were employed to confirm the veracity of point mutation. CD and Lysozyme activity assays were performed to determine whether or not the 3D structure of all the protein variants was intact. Zonal analysis was used to obtain the binding strength values of all seventeen variants in IMAC with copper as the immobilized metal ions, and gradient elution method was used to obtain the relative retention times (rRT) values of all the variants in IEC. The seven lysozyme variants generated in category I each contains one surface histidine residue. In IMAC, there is a correlation between the surface accessibility of the lone surface histidine and the protein's binding strength with R²⁺= 0.76. In IEC, the correlation between the protein's microstructure, which predominantly consists the surface accessibility of the histidine residue, and the protein's retention times was R²⁺= 0.95. However, there were few outlier variants (e.g. variant K83H) which did not follow the correlations. The variations presented by few outlier variants can be attributed to the presence of intramolecular bonds, which restrict the mobility of the amino acid side chains and subsequently hinder the specific interaction between the amino acid residue and chromatographic media. For category II variants, short and medium range charge perturbations around the sole histidine residue in T4 lysozyme were engineered within 15 Ã distance of histidine. There was a strong correlation (R²⁺ = 0.96) between the theoretical (DeltaDeltaGElec) values, calculated using simple Coulomb's law, and the experimental (DeltaDeltaGB) values, which were obtained by measuring the protein binding strength values using IMAC. Similar correlation (R²⁺= 0.93) was obtained between the change in net charge (-2 to +2 units) and the relative retention times in IEC. Similarly, there were few variants (e.g. S136K, R76D) that did not follow the trends. The deviations of the few outlier variants can be attributed to the presence of unique microstructure effects around the histidine residue. These microstructure effects were quantified in IMAC as (DeltaDeltaGMicro), and in IEC they were quantified by the change in rRT values. In summary, all seventeen variants had different binding strengths and rRT values indicating the variation in the protein structure around the histidine residue. Our work reveals that it is possible to capture the microstructural effects of a protein through the combination of protein molecular modeling and simple chromatographic experiments.
Ph. D.
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Li, Linlin. « Microstructure characterization of polymers by modern NMR techniques ». University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1353000762.

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Mosaliganti, Kishore Rao. « Microscopy Image Analysis Algorithms for Biological Microstructure Characterization ». The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211390127.

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Camesasca, Marco. « MULTISCALING ANALYSIS OF FLUIDIC SYSTEMS : MIXING AND MICROSTRUCTURE CHARACTERIZATION ». online version, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1144350255.

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Yang, Xuan. « Three-dimensional Characterization of Inherent and Induced Sand Microstructure ». Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7557.

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In the last decade, a significant amount of research has been performed to characterize the microstructure of unsheared and sheared triaxial sand specimens to advance the understanding of the engineering behavior of soils. However, most of the research has been limited to two-dimensional (2-D) image analysis of section planes that resulted in loss of information regarding the skeleton of the soil (pore structure) and other attributes of the three-dimensional (3-D) microstructure. In this research, the 3-D microstructures of triaxial test specimens were, for the first time, characterized. A serial sectioning technique was developed for obtaining 3-D microstructure from 2-D sections of triaxial test specimens. The mosaic technique was used to get high-resolution large field of view images. Various 3-D characterization parameters were used to study the microstructures of the specimens. To study the preparation method induced variation in soil microstructure, two specimens prepared with air pluviation and moist tamping methods were preserved with epoxy impregnation. A coupon was cut from the center of each specimen, and following a serial sectioning and image capture process, the 3-D structure was reconstructed. To study the evolution of structure during shearing tests, two additional specimens prepared to the same initial conditions with the same methods were subjected to axial compression loading under constant confining pressure up to an axial strain level of 14%. After shearing, the structure of these specimens were also preserved and analyzed following the same procedures as the unsheared specimens. The evolution of the pore structures was investigated accordingly. It was found that generally, moist tamped specimens were initially less uniform but had a more isotropic structure than air pluviated specimens. The standard deviations of 2-D local void ratio and 3-D pore size in dilated regions of sheared air pluviated and moist-tamped specimens were found to be smaller than those of as-consolidated specimens at a given void ratio. Tortuosity decreased with increasing pore size. It was also evident that the soil structures evolved differently depending on the initial structure. Comparison between 2-D and 3-D results indicated that it is not sufficient to use 2-D section information for characterizing some microstructural features.
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Komulainen, M. (Miika). « Microstructure characterization of pulsed laser deposited metal oxide nanoparticles ». Master's thesis, University of Oulu, 2016. http://jultika.oulu.fi/Record/nbnfioulu-201602111172.

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Abstract. In this thesis, the effects of pulsed laser deposition processing parameters on microstructure of tungsten trioxide thin films was studied. Samples were deposited at room temperature under three different background oxygen pressure levels using three different laser beam fluence. Some samples were post-annealed at temperatures between 400 and 600 °C, and the rest were left as deposited. Micro- and crystal structure of the samples were examined with X-ray diffraction, Raman spectroscope, atomic force microscope, and field emission scanning electron microscope. Results showed that the films were porous, constructed of nanoparticles and had a rough surface. In crystal structure studies, amorphous phase as well as crystalline monoclinic γ- ja ε-phases were found. Value of background pressure and laser beam fluence were found to have significant effect on crystal structure, morphology, porosity, and thickness of the films. Effect of post-annealing temperature was non-linear and dependent on the as-deposited structure of the films. Before the post-annealing, the films were mostly amorphous and during the heating some of them remained amorphous, some crystallized into γ-phase, and some formed different mixtures of γ- and ε-phases. Grain sizes of the samples were studied with different methods, which gave somewhat different results, but it could be concluded that fluence of the laser was largely insignificant, and pressure and post-annealing temperature had more dominant effects.Pulssilaserkasvatettujen metallioksidinanopartikkeleiden mikrorakenteen karakterisointi. Tiivistelmä. Tässä työssä tutkittiin pulssilaserkasvatuksen parametrien vaikutusta volframitrioksidistaohutkalvojen mikrorakenteeseen. Näytteet kasvatettiin huonelämpötilassa kolmessa eri happipaineessa ja kolmella eri laserin intensiteetillä. Osa näytteistä jälkihehkutettiin 400–600 °C asteen lämpötilassa. Näytteiden mikro- ja kiderakennetta tutkittiin röntgendiffraktiolla, Raman spektroskopialla sekä atomivoima- ja elektronimikroskopian menetelmillä. Tuloksista kävi ilmi kalvojen huokoinen, nanopartikkeleista koostuva rakenne, pinnan karheus sekä eri faasien määräsuhteet. Amorfisen faasin lisäksi näytteistä löytyi kiteiset monokliiniset γ- ja ε-faasit. Taustapaineen ja laserin intensiteetin muutosten havaittiin vaikuttavan voimakkaasti kalvojen huokoisuuteen, pinnan rakenteeseen ja kalvon paksuuteen. Paineen ja intensiteetin vaikutukset olivat vastakkaisia, mutta aina samanlaisia. Jälkihehkutuksen vaikutus oli epälineaarinen sekä riippuvainen hehkutuslämpötilasta, mutta myös hehkuttamattomasta kalvon rakenteesta. Ennen jälkihehkutusta kalvot olivat pääsääntöisesti amorfista faasia, mutta hehkutettaessa osa jäi pääosin amorfiseksi ja loput kiteytyivät melko puhtaaksi monokliiniseksi γ-faasiksi tai erilaiseksi yhdistelmäksi ε- ja γ-faaseja. Jälkihehkutettujen kalvojen raekokoja laskettiin röntgendiffraktion mittaustuloksista eri menetelmillä, joilla saatiin hieman eriäviä tuloksia, mutta kaikista kävi ilmi, että laserin intensiteetillä ei ollut merkittävää vaikutusta keskimääräiseen raekokoon toisin kuin lämpötilalla ja taustapaineella.
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Livres sur le sujet "Microstructure and Characterization"

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Brandon, D. G. Microstructural characterization of materials. 2e éd. Chichester, England : John Wiley, 2008.

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A, Leonhardt Todd, et United States. National Aeronautics and Space Administration., dir. Fluorescence microscopy for the characterization of structural integrity. [Washington, DC] : National Aeronautics and Space Administration, 1991.

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D, Kaplan Wayne, dir. Microstructural characterization of materials. Chichester : J. Wiley, 1999.

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Struble, Leslie J. Epoxy impregnation of hardened cement pastes for characterization of microstructure. Gaithersburg, MD : U.S. Dept. of Commerce, National Bureau of Standards, 1986.

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1953-, Gerhardt Rosario A., Taylor S. R. 1953- et Garboczi Edward J, dir. Electrically based microstructural characterization : Symposium held November 27-30, 1995, Boston, Massachusetts, U.S.A. Pittsburgh, Pa : Materials Research Society, 1996.

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Singh, Jag J. Microstructural characterization of polymers by positron lifetime spectroscopy. [Washington, D.C : National Aeronautics and Space Administration, 1996.

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United States. National Aeronautics and Space Administration., dir. Microstructural characterization of polymers by positron lifetime spectroscopy. [Washington, D.C : National Aeronautics and Space Administration, 1996.

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A, Leonhardt T., et United States. National Aeronautics and Space Administration., dir. Microstructural characterization of reaction-formed silicon carbide ceramics. [Washington, D.C : National Aeronautics and Space Administration, 1995.

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Singh, M. Microstructural characterization of reaction-formed silicon carbide ceramics. [Washington, D.C : National Aeronautics and Space Administration, 1995.

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Z, Voyiadjis G., American Society of Mechanical Engineers. Materials Division., ASME Summer Structural Mechanics Conference (1992 : Tempe, Ariz.) et ASME Summer Materials Conference (1992 : Tempe, Ariz.), dir. Microstructural characterization in constitutive modeling of metals and granular media. New York, N.Y : American Society of Mechanical Engineers, 1992.

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Chapitres de livres sur le sujet "Microstructure and Characterization"

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Blackwell, John. « Microstructure Characterization ». Dans Structure Formation in Polymeric Fibers, sous la direction de David R. Salem, 457–520. München : Carl Hanser Verlag GmbH & Co. KG, 2001. http://dx.doi.org/10.3139/9783446456808.013.

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Shen, Chen, Ning Ma, Yuwen Cui, Ning Zhou et Yunzhi Wang. « Coupling Microstructure Characterization with Microstructure Evolution ». Dans Computational Methods for Microstructure-Property Relationships, 151–97. Boston, MA : Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-0643-4_5.

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Kline, Ronald A., et Robert Adams. « Ultrasonic Characterization of Composite Microstructure ». Dans Nondestructive Characterization of Materials IV, 321–28. Boston, MA : Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-0670-0_39.

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Hidalgo, M., P. Callejas et J. Ma Rincón. « Microstructure Characterization of Basalt Glass-Ceramics ». Dans Ceramic Microstructures ’86, 117–26. Boston, MA : Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1933-7_12.

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Sabbagh, Harold A., R. Kim Murphy, Elias H. Sabbagh, Liming Zhou et Russell Wincheski. « A Model for Microstructure Characterization ». Dans Scientific Computation, 197–213. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67956-9_8.

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Freudenberger, Jens, Martin Heilmaier et Ulrich Wendt. « Atomic Structure and Microstructure Characterization ». Dans Springer Handbook of Mechanical Engineering, 131–63. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-47035-7_4.

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Cuevas Mata, O., A. F. Miranda Pérez, F. J. García Vázquez, G. Y. Pérez Medina et F. A. Reyes Valdés. « Effect of FSW Parameters on Microstructure of Aluminum Matrix Composites Joints ». Dans Materials Characterization, 139–46. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15204-2_14.

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Sarac, Baran. « Structural Characterization of Metallic Glasses ». Dans Microstructure-Property Optimization in Metallic Glasses, 29–36. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13033-0_3.

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Kirkwood, David H., Michel Suéry, Plato Kapranos, Helen V. Atkinson et Kenneth P. Young. « Characterization of Microstructure in Semisolid Slurries ». Dans Semi-solid Processing of Alloys, 17–21. Berlin, Heidelberg : Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00706-4_2.

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Choi, C. S., E. L. Baker et J. Orosz. « Microstructure Study of Molybdenum Liners by Neutron Diffraction ». Dans Nondestructive Characterization of Materials VI, 637–44. Boston, MA : Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2574-5_81.

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Actes de conférences sur le sujet "Microstructure and Characterization"

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Jin, Si-Yu, Shi Wen, Wei-Wei Du et Lyes Douadji. « Carbon Fibre Microstructure Characterization ». Dans The 2nd Annual International Workshop on Materials Science and Engineering (IWMSE 2016). WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813226517_0140.

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Meyendorf, N. « Acousto-Thermal Microstructure Characterization ». Dans REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION:Volume 22. AIP, 2003. http://dx.doi.org/10.1063/1.1570180.

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Padmore, H. A. « X-ray microscopy ; an emerging technique for semiconductor microstructure characterization ». Dans CHARACTERIZATION AND METROLOGY FOR ULSI TECHNOLOGY. ASCE, 1998. http://dx.doi.org/10.1063/1.56855.

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Sanchez, Nuria, Nenad Ilić et Martin Liebeherr. « Characterization of X80 Grade Linepipe Steel Coil With 24 mm Thickness ». Dans 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90412.

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High strength and high toughness at low temperatures on heavy wall thickness skelp is required to build high pressure gas transportation pipelines. Detailed mechanical and microstructural characterization was carried on 24mm thick ArcelorMittal X80 coils in order to identify the microstructure control required to reach high toughness as determined by the shear fracture appearance after DWTT testing. Detailed microstructural characterization through thickness reveals that the microstructure gradient described by a systematic increase of the average grain size between surface and middle thickness of the strip and the increment of the volume fraction of M/A (martensite/ retained austenite) are the key microstructural parameters to control in order to ensure the adequate toughness of the material. The obtained high toughness of the coils indicates that the microstructure, controlled by an optimized rolling and cooling practice, is homogeneous through thickness of heavy wall linepipe grades.
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Mahajan, Heramb P., Mohamed Elbakhshwan, Bruce C. Beihoff et Tasnim Hassan. « Mechanical and Microstructural Characterization of Diffusion Bonded 800H ». Dans ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21502.

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Abstract Compact heat exchangers have high compactness and efficiency, which is achieved by joining a stack of chemically etched channeled plates through diffusion bonding. In the diffusion bonding process, compressive stress is applied on plates at elevated temperatures for a specified period. These conditions lead to atomic diffusion, which results in the joining of all plates into a monolithic block. The diffusion bonding temperatures are above recrystallization temperatures, which changes the mechanical and microstructural properties of the bonded metal. Hence, diffusion bonded material needs mechanical and microstructural property evaluation. In this study, Alloy 800H is selected to study the influence of the diffusion bonding process on mechanical and microstructure properties of base metal. A series of tensile, fatigue, creep, and creep-fatigue experiments are conducted on base metal 800H (BM 800H) and diffusion bonded 800H (DB 800H) to explore the mechanical properties. Microstructure evolution during diffusion bonding is studied and presented in the paper. The mechanical and microstructural observations indicated ductile fracture at room temperature and brittle failure with bond delamination at elevated temperatures. The microstructure evolution during diffusion bonding is studied through tensile, fatigue, creep and creep-fatigue tests, and the implied root causes for the mechanical property changes are investigated. Efforts are made to correlate the microstructure change with mechanical property change in DB 800H.
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Gong, Xibing, Xiaoqing Wang, Vernon Cole, Zachary Jones, Kenneth Cooper et Kevin Chou. « Characterization of Microstructure and Mechanical Property of Inconel 718 From Selective Laser Melting ». Dans ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9317.

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In this study, the microstructures and mechanical properties of Inconel 718 fabricated from selective laser melting (SLM) process were experimentally investigated. Specimens with different build heights were prepared for microstructural observations by optical microscopy and scanning electron microscope. The texture evolution was also examined using electron backscatter diffraction (EBSD). In general, columnar γ dendrites are found along the build direction from the X-plane (side surface), while the microstructure of Z-plane (scanning surface) is characterized by equiaxed grains. The microstructures vary along the build height: the top layers present coarse columnar dendrites while the bottom layers show much narrower columnar dendrites owing to a higher cooling rate. The top layers also present the combination of a γ matrix and a higher percentage of the Laves phase, while the bottom layers show a much less Laves phase due to, again, a higher cooling rate. Random textures are shown for the SLM Inconel 718 samples. Nanoindentation tests identify the Young’s modulus and hardness of about 200 GPa and 7 GPa, respectivley.
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Karim, Saniah Ab, Muhammad Azwadi Sulaiman, Mohamad Najmi Masri, Mohamad Bashree Abu Bakar, Mohd Hazim Mohamad Amini, Mohd Fadzil Ain et Zainal Arifin Ahmad. « Microstructure and dielectric properties of silicone rubber/CCTO composites ». Dans MATERIALS CHARACTERIZATION USING X-RAYS AND RELATED TECHNIQUES. Author(s), 2019. http://dx.doi.org/10.1063/1.5089348.

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Neffe, S., et M. Szustakowski. « Characterization Of The Microstructure Of Optical Fibres ». Dans Optical Fibres and Their Applications, sous la direction de Ryszard S. Romaniuk et Mieczyslaw Szustakowski. SPIE, 1986. http://dx.doi.org/10.1117/12.938974.

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Sherehiy, Andriy, Andres Montenegro, Danming Wei et Dan O. Popa. « Adhesive Deposition Process Characterization for Microstructure Assembly ». Dans ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-63929.

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Abstract Recent advancements in additive manufacturing such as Direct Write Inkjet printing introduced novel tools that allow controlled and precise deposition of fluid in nano-liter volumes, enabling fabrication of multiscale structures with submillimeter dimensions. Applications include fabrication of flexible electronics, sensors, and assembly of Micro-Electro-Mechanical Systems (MEMS). Critical challenges remain in the control of fluid deposition parameters during Inkjet printing to meet specific dimensional footprints at the microscale necessary for the assembly process of microscale structures. In this paper we characterize an adhesive deposition printing process with a piezo-electric dispenser of nano-liter volumes. Applications include the controlled delivery of high viscosity Ultraviolet (UV) and thermal curable adhesives for the assembly of the MEMS structures. We applied the Taguchi Design of Experiment (DOE) method to determine an optimal set of process parameters required to minimize the size of adhesive printed features on a silicon substrate with good reliability and repeatability of the deposition process. Experimental results demonstrate repeatable deposition of UV adhesive features with 150 μm diameter on the silicon substrate. Based on the observed wettability effect of adhesive printed onto different substrates we propose a solution for further reduction of the deposit-substrate contact area for microassembly optimization.
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Weiss, Sabine, Tim Schnauber et Alfons Fischer. « Microstructure Characterization of Thin Structures After Deformation ». Dans 2008 MRS Fall Meetin. Materials Research Society, 2008. http://dx.doi.org/10.1557/proc-1129-v11-19.

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Rapports d'organisations sur le sujet "Microstructure and Characterization"

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Steinzig, Michael. Stochastic Characterization of Cast Metal Microstructure. Office of Scientific and Technical Information (OSTI), juin 1999. http://dx.doi.org/10.2172/8947.

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Devaraj, Arun, Libor Kovarik, Vineet V. Joshi, Saumyadeep Jana, Sandeep Manandhar, Bruce W. Arey et Curt A. Lavender. High-Resolution Characterization of UMo Alloy Microstructure. Office of Scientific and Technical Information (OSTI), novembre 2016. http://dx.doi.org/10.2172/1339907.

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Anghel, Veronica, Carl Trujillo, David Jones, Daniel Martinez, Ramon Martinez, Saryu Fensin et George Gray. Microstructure Characterization of Tin Taylor Impact Specimens. Office of Scientific and Technical Information (OSTI), octobre 2020. http://dx.doi.org/10.2172/1699411.

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Shannon, Jameson, Cody Strack et Robert Moser. Constituent materials characterization for virtual concrete microstructure generation. Engineer Research and Development Center (U.S.), juin 2019. http://dx.doi.org/10.21079/11681/33054.

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Struble, L., et E. Byrd. Epoxy impregnation of hardened cement pastes for characterization of microstructure. Gaithersburg, MD : National Bureau of Standards, 1986. http://dx.doi.org/10.6028/nbs.ir.87-3504.

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Kelly, James F. Application of optical image analysis to quantitative microstructure characterization of composite materials. Gaithersburg, MD : National Bureau of Standards, 1987. http://dx.doi.org/10.6028/nbs.ir.87-3681.

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McClintock, David A., Thao N. Strong et Drew E. Winder. Tensile and Microstructure Characterization of SNS Target Swirl Bubblers Fabricated by Additive Manufacturing. Office of Scientific and Technical Information (OSTI), octobre 2018. http://dx.doi.org/10.2172/1479726.

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Dinovitzer, Aaron. PR-214-144500-R01 Weld Hydrogen Cracking Susceptibility Characterization. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), mars 2016. http://dx.doi.org/10.55274/r0010924.

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Hydrogen cracking has been and continues to be observed in both heat-affected zones and weld metals. High carbon equivalent weldment heat-affected zones (HAZ) combined with rapid cooling have been related to the development of hydrogen cracking susceptible microstructures. Weld metal cracking is observed in both high and low strength weldments and is a particular concern for root passes due to the use of cellulosic electrodes, parent metal dilution, applied load, and weld fault stress riser effects promoting cracking. The risk of HAZ and weld cracking are increased for repair and in-service welds and/or welds deposited on older generation materials (e.g., pipe or fittings) and this can pose a significant risk to the integrity of welded connections. This report presents the result of the first year of research toward the application and extension of the �Slow Bend� testing technique used to quantify the hydrogen cracking susceptibility of a weldment. This testing is being used to quantify the susceptibility of a microstructure to hydro-gen cracking by defining the critical combinations of strain and hydrogen concentration that result in cracking in a given material. The testing and modelling results complete in this first year of work are planned to support the definition of a Hydrogen Embrittlement characterization technique considering the effects of strain and hydrogen concentration for a material.
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Dinovitzer, Aaron. PR-214-144500-R05 Weld Hydrogen Cracking Susceptibility Characterization. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), juillet 2018. http://dx.doi.org/10.55274/r0011495.

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Hydrogen cracking has been and continues to be observed in both heat-affected zones and weld metals. High carbon equivalent weldment heat-affected zones (HAZ) combined with rapid cooling have been related to the development of hydrogen cracking susceptible microstructures. Weld metal cracking is observed in both high and low strength weldments and is a particular concern for root passes due to the use of cellulosic electrodes, parent metal dilution, applied load, and weld fault stress riser effects promoting cracking. The risk of HAZ and weld cracking are increased for repair and in-service welds and/or welds deposited on older generation materials (e.g., pipe or fittings) and this can pose a significant risk to the integrity of welded connections. This report presents the result of research in the application and extension of the "Slow Bend" testing technique used to quantify the hydrogen cracking susceptibility of a weldment. This testing is being used to quantify the susceptibility of a microstructure to hydrogen cracking by defining the critical combinations of strain and hydrogen concentration (i.e. hydrogen embrittlement curves) that result in cracking in a given material. The testing and modelling results have been used to define relationships between the hydrogen embrittlement curve parameters (i.e. ductility and hydrogen embrittlement indices) and the properties of the deposited weld metal. These preliminary relationships were defined separately for cellulosic and basic SMAW electrodes providing insight to the factors that make a weld material susceptible to hydrogen cracking.
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Smith, James A., Anthony L. Crawford, Corrie I. Nichol, Eric D. Larsen et Larry D. Zuck. Vibro-acoustic Testing for Microstructure Characterization and Metrology : Technology Commercialization Fund—Fiscal Year 2017. Office of Scientific and Technical Information (OSTI), mai 2018. http://dx.doi.org/10.2172/1467489.

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