Relevant bibliographies by topics / Microstructure Complexe

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Microstructure Complexe'

Author: Grafiati
Published: 8 June 2024
Last updated: 31 July 2025

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Journal articles on the topic "Microstructure Complexe"

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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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Sidor, Jurij J. "Quantitative Indicators of Microstructure and Texture Heterogeneity in Polycrystalline System." Materials 17, no. 24 (2024): 6057. https://doi.org/10.3390/ma17246057.

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The microstructural features of polycrystals determine numerous properties, whereas the evolution of crystallographic texture is responsible for the anisotropy of particular properties. Therefore, it is of crucial importance to find proper quantitative indicators, which reflect the nature of microstructure and texture characteristics. This is partially performed by the assessment of the average grain size and texture intensity that provide basic information on the microstructural features evolved; however, often, the basic quantitative indicators are not capable of revealing the complete micro
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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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Talmon, Yeshayahu. "Cryo-TEM of amphiphilic polymer and amphiphile/polymer solutions." Proceedings, annual meeting, Electron Microscopy Society of America 51 (August 1, 1993): 876–77. http://dx.doi.org/10.1017/s0424820100150216.

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To achieve complete microstructural characterization of self-aggregating systems, one needs direct images in addition to quantitative information from non-imaging, e.g., scattering or Theological measurements, techniques. Cryo-TEM enables us to image fluid microstructures at better than one nanometer resolution, with minimal specimen preparation artifacts. Direct images are used to determine the “building blocks” of the fluid microstructure; these are used to build reliable physical models with which quantitative information from techniques such as small-angle x-ray or neutron scattering can b
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Yue, Tao, Shenyu Gu, Na Liu, et al. "Self-alignment of microstructures based on lateral fluidic force generated by local spatial asymmetry inside a microfluidic channel." AIP Advances 12, no. 3 (2022): 035335. http://dx.doi.org/10.1063/5.0086138.

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Three-dimensional (3D) microstructures have various applications in many fields due to their unique physical properties. Manufacturing 3D microstructures with precise micron-scale features is difficult. Although the assembly of two-dimensional (2D) structures is a smart way to construct complex 3D microstructures, the way to assemble those 2D structures precisely is still immature. One key issue is that alignment errors often occur during the assembly process, affecting the architecture accuracy of the assembled 3D structures. In this paper, we propose a method to eliminate the alignment error
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Rodgers, Theron M., Hojun Lim, and Judith A. Brown. "Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties." JOM 72, no. 1 (2019): 75–82. http://dx.doi.org/10.1007/s11837-019-03808-x.

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Abstract Metal additive manufacturing (AM) allows for the freeform creation of complex parts. However, AM microstructures are highly sensitive to the process parameters used. Resulting microstructures vary significantly from typical metal alloys in grain morphology distributions, defect populations and crystallographic texture. AM microstructures are often anisotropic and possess three-dimensional features. These microstructural features determine the mechanical properties of AM parts. Here, we reproduce three “canonical” AM microstructures from the literature and investigate their mechanical
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Beh, Chong You, Ee Meng Cheng, Xiao Jian Tan, et al. "Complex Impedance and Modulus Analysis on Porous and Non-Porous Scaffold Composites Due to Effect of Hydroxyapatite/Starch Proportion." Polymers 15, no. 2 (2023): 320. http://dx.doi.org/10.3390/polym15020320.

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This study aims to investigate the electric responses (complex modulus and complex impedance analysis) of hydroxyapatite/starch bone scaffold as a function of hydroxyapatite/starch proportion and the microstructural features. Hence, the non-porous and porous hydroxyapatite/starch composites were fabricated with various hydroxyapatite/starch proportions (70/30, 60/40, 50/50, 40/60, 30/70, 20/80, and 10/90 wt/wt%). Microstructural analysis of the porous hydroxyapatite/starch composites was carried out by using scanning electron microscopy. It shows that the formation of hierarchical porous micro
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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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Gallardo-Basile, Francisco-José, Yannick Naunheim, Franz Roters, and Martin Diehl. "Lath Martensite Microstructure Modeling: A High-Resolution Crystal Plasticity Simulation Study." Materials 14, no. 3 (2021): 691. http://dx.doi.org/10.3390/ma14030691.

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Lath martensite is a complex hierarchical compound structure that forms during rapid cooling of carbon steels from the austenitic phase. At the smallest, i.e., ‘single crystal’ scale, individual, elongated domains, form the elemental microstructural building blocks: the name-giving laths. Several laths of nearly identical crystallographic orientation are grouped together to blocks, in which–depending on the exact material characteristics–clearly distinguishable subblocks might be observed. Several blocks with the same habit plane together form a packet of which typically three to four together
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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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Dissertations / Theses on the topic "Microstructure Complexe"

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Aouak, Taïeb. "Homopolymérisation et copolymérisation des alcynes monosubstitués amorceées par les complexes de Ziegler-Natta : étude de réactions conduites en présence de catalyseurs solubles formés en associant un carboxylate de fer(III) et un alkylaluminium, caractérisation des polyalcynes." Vandoeuvre-les-Nancy, INPL, 1994. http://docnum.univ-lorraine.fr/public/INPL_T_1994_AOUAK_T.pdf.

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L'étude comparative de l'efficacité d'une série de dérivés organoferriques aliphatiques, alicycliques et aromatiques, combinés à AlEt3, sur la polymérisation du hex-1-yne (HX), a revelé que les composés Fe(CH3CH2CO2)3, Fe(naph)3 et Fe(C6H11CO2)3, sont doués d'une haute activité catalytique (Rdt 100%, Mn=6. 10^4). Les essais conduits en présence du couple Fe(CH3CH2CO2)3AlEt3, montrent que cette combinaison est parfaitement appropriée pour polymériser les alcynes terminaux: 3-méthylpent-1-yne, 4-méthylpent-1-yne et phénylacetylène (PA). Les 3-triméthylsiloxyprop-1-yne (TMSOP) et 1-triméthylsilyl
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Khal, Jeaidi Hana El. "Relations frittage - microstructure - propriétés électriques des céramiques de type LAMOX." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI069/document.

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Le matériau La_2 Mo_1,5 W_0,5 O_9 (LMW05) est un conducteur ionique de la famille LAMOX qui a récemment connu un grand potentiel en tant qu’électrolyte solide dans des systèmes électrochimiques haute température. L’objectif de cette thèse est double : d’une part, étudier les effets de certains paramètres microstructuraux, essentiellement la porosité, sur les propriétés électriques des échantillons céramiques de LMW05 et, d’autre part, appliquer le procédé de frittage flash pour la préparation d’échantillons denses.Les échantillons poreux ont été préparés par frittage à des températures compris
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Badetti, Michel. "Rhéologie des matériaux granulaires non saturés." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1020/document.

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Nous reportons dans ce travail le comportement mécanique, dans le régime solide et en écoulement, de matériaux granulaires liés par un liquide non saturant, qui intervient par sa viscosité et par des effets capillaires. De tels matériaux, intermédiaires entre les assemblages granulaires secs et les suspensions très concentrées, sont étudiés expérimentalement et par simulations discrètes depuis la microstructure jusqu'au comportement macroscopique. Ainsi, on adopte une démarche multi-échelle, dont l’objectif est d’établir les fondements de la compréhension des phénomènes capillaires et/ou visqu
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Lian, Weidong. "Contribution à l'homogénéisation numérique du comportement élastique de matériaux à microstructure complexe caractérisés par imagerie." Ecole centrale de Nantes, 2011. http://www.theses.fr/2011ECDN0004.

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Les méthodes d'homogénéisation numériques sont maintenant largement utilisées. De plus les techniques d'imagerie permettent une représentation géométrique très précise de la microstructure des matériaux, qui conduit le plus souvant à des modèles éléments finis "voxels". Une autre approche a été recemment proposée pour les modèles à partir d'images, basée sur l'approche X-FEM associée à la méthode level-sets. Ces deux approches sont comparées et il est montré que la méthode X-FEM/levels sets est plus efficace et précise que l'apporche voxels. La prise en compte d'images de la microstructure met
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Dischler, Jean-Michel. "La génération de textures 3D et de textures a microstructure complexe pour la synthese d'images." Université Louis Pasteur (Strasbourg) (1971-2008), 1996. http://www.theses.fr/1996STR13015.

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Déléris, Jacqueline. "Plutonisme bimodal en contexte décrochant panafricain : étude pétro-structurale du complexe de Toro (Nigeria)." Toulouse 3, 1995. http://www.theses.fr/1995TOU30212.

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Le complexe de toro, situe dans la province nord du nigeria, est un pluton bimodal calco-alcalin faisant partie des older granites panafricains. Il est constitue d'un corps principal de granite porphyroide (75 km2), entourant un corps basique de diorite a hyperstene (25 km2). Le contact entre ces deux magmas est complexe ; roches hybrides tonalitiques temoignant de melanges complets (mixing) ou partiels (mingling), roches provenant de l'encaissant, refusion partielle du granite porphyroide en un granite equigranulaire, bordure microgenus de la diorite. La technique de l'anisotropie de la susce
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Karam, Marie-Céleste. "Réhydratation des protéines laitières dans un milieu complexe : influence de l'état d'hydratation sur les propriétés texturales des gels acides." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0132/document.

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L'objectif de la thèse a été d'élucider le processus de réhydratation des caséines micellaires et des protéines solubles dans un milieu complexe et opaque : le lait. L'influence de l'état d'hydratation de ces ingrédients laitiers en fonction du temps (5, 120, 180, 240, 300, 480, 900 et 1440 min de réhydratation) sur les propriétés rhéologiques, texturales, physiques ainsi que la microstructure des gels laitiers acides a également été étudiée. Il en résulte que le processus de réhydratation des caséines micellaires diffère de celui des protéines solubles, et est extrêmement long avec trois étap
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Bibalou, Pascal Blaise. "Copolymérisation du 2,5 furannédione 3 méthyle et de l'acétate de vinyle influence d'un complexe entre comonomères sur la microstructure des copolymères." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37596030f.

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Du, Kou. "Modélisation micromécanique de géomatériaux en prenant en compte des anisotropies microstructurale et matricielle." Electronic Thesis or Diss., Université de Lorraine, 2021. http://docnum.univ-lorraine.fr/public/DDOC_T_2021_0254_DU.pdf.

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Les propriétés mécaniques des géomatériaux hétérogènes sont évaluées en prenant simultanément en compte l'anisotropie microstructurale ainsi que celle du matériau matriciel. A cet effet, l'anisotropie de la microstructure est représentée par la complexité de forme poreuse et/ou d'inclusion qui est considérée dans le présent travail comme concave ou convexe en portant nos attentions particulières aux pores supersphériques et supersphéroïdaux axisymétriques. Les tenseurs de concentration et de contribution sont calculés numériquement à l'aide de la méthode des élément finis (FEM), qui est ensuit
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Lucas, Iris. "Dynamique et contrôle d'un marché financier avec une approche système multi-agents." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMLH39/document.

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Cette thèse propose une réflexion autour de l'étude des marchés financiers sous le prisme des systèmes complexes.Tout d'abord une description mathématique est proposée pour représenter le processus de prises de décision des agents dès lors où celui-ci bien que représentant les intérêts individuels d'un agent, est également influencé par l'émergence d'un comportement collectif. La méthode est particulièrement applicable lorsque le système étudié est caractérisé par une dynamique non-linéaire. Une application du modèle est proposée au travers de l'implémentation d'un marché artificiel boursier a
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Books on the topic "Microstructure Complexe"

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R, Stevens, and Taylor Derek 1939-, eds. Complex microstructures. Institute of Ceramics, 1989.

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R, Stevens, Taylor D, and British Ceramic Society, eds. Complex microstructures. Institute of Ceramics, 1989.

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Botterill, Sarah Lindsay. The electroforming of complex structures and microstructures. University of Birmingham, 1997.

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Tomaso, Aste, Di Matteo T, and Tordesillas A, eds. Granular and complex materials. World Scientific, 2007.

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A, Bednarcyk Brett, and United States. National Aeronautics and Space Administration., eds. An efficient implementation of the GMC micromechanics model for multi-phased materials with complex microstructures. National Aeronautics and Space Administration, 1997.

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A, Bednarcyk Brett, and United States. National Aeronautics and Space Administration., eds. An efficient implementation of the GMC micromechanics model for multi-phased materials with complex microstructures. National Aeronautics and Space Administration, 1997.

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Gordeeva, N. D. Microstructural analysis of the execution complex motor actions: Methods and results. Oxonian Press, 1989.

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Gordeeva, N. D. Microstructural analysis of the execution of complex motor actions: Methods and results. Published for the National Library of Medicine by Amerind Pub. Co. ; Springfield, Va. : Available from the U.S. Dept. of Commerce, National Technical Information Service, 1989.

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Evans, Robert. Art, science and informatics: Visualisation of large, complex data sets in high-speed measuremnt of the microstructure of wood. University of British Columbia, 2002.

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Evans, Robert. Art, science and informatics: Visualisation of large, complex data sets in high-speed measurement of the microstructure of wood. University of British Columbia, 2002.

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Book chapters on the topic "Microstructure Complexe"

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Lewis, Jennifer A. "Colloidal Stability in Complex Fluids." In Ceramic Microstructures. Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5393-9_48.

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Tsimpli, Ianthi Maria, Lina Mukhopadhyay, Anusha Balasubramanian, and Jeanine Treffers-Daller. "Chapter 4. Microstructural properties in the narrative retellings of young English learners in EMI schools in India." In Studies in Bilingualism. John Benjamins Publishing Company, 2024. http://dx.doi.org/10.1075/sibil.66.04tsi.

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The present study investigates narrative microstructure in the English oral retellings of primary school children from disadvantaged backgrounds in India. For these children, the combination of rich linguistic diversity and English as the medium of instruction is a challenge since exposure to English is almost exclusively in the school context. Measures of microstructure include syntactic complexity and finiteness marking as well-known indices of English language ability. Microstructural properties are examined in relation to literacy performance in order to identify possible links between the
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Wu, Meng-jen John. "Complete Waveguide Structures." In Integrated Optics, Microstructures, and Sensors. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-2273-7_5.

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Vega, Clara, and Christian S. Miller. "Market MicrostructureMarket microstructure." In Complex Systems in Finance and Econometrics. Springer New York, 2009. http://dx.doi.org/10.1007/978-1-4419-7701-4_32.

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Osler, Carol. "Market Microstructure, Foreign Exchange." In Complex Systems in Finance and Econometrics. Springer New York, 2009. http://dx.doi.org/10.1007/978-1-4419-7701-4_33.

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White, Lee F., James R. Darling, Desmond E. Moser, et al. "Complex Nanostructures in Shocked, Annealed, and Metamorphosed Baddeleyite Defined by Atom Probe Tomography." In Microstructural Geochronology. John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119227250.ch17.

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Porubov, Alexey V. "Essentially Nonlinear Strain Waves in Solids with Complex Internal Structure." In Mechanics of Microstructured Solids. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00911-2_13.

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Holzer, Lorenz, Philip Marmet, Mathias Fingerle, Andreas Wiegmann, Matthias Neumann, and Volker Schmidt. "Towards a Quantitative Understanding of Microstructure-Property Relationships." In Tortuosity and Microstructure Effects in Porous Media. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-30477-4_5.

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Abstract100 years ago, the concept of tortuosity was introduced by Kozeny in order to express the limiting influence of the microstructure on porous media flow. It was also recognized that transport is hindered by other microstructure features such as pore volume fraction, narrow bottlenecks, and viscous drag at the pore surface. The ground-breaking work of Kozeny and Carman makes it possible to predict the macroscopic flow properties (i.e., permeability) based on the knowledge of the relevant microstructure characteristics. However, Kozeny and Carman did not have access to tomography and 3D i
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Schmauder, Siegfried, and Leon Mishnaevsky. "Complex, Graded and Interpenetrating Microstructures." In Micromechanics and Nanosimulation of Metals and Composites. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-78678-8_4.

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Faran, Eilon, and Doron Shilo. "Microstructural Effects During Crackling Noise Phenomena." In Understanding Complex Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-45612-6_9.

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Conference papers on the topic "Microstructure Complexe"

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Kudo, Chihana, Xinyu Yan, and Kyosuke Yoshimi. "Microstructural Analysis of MoSiBTiC Alloys Based on Scanning Electron Microscopy Image Segmentation." In AM-EPRI 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0507.

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Abstract The microstructure of MoSiBTiC alloys is very complex, with three to four constituent phases and characteristic structures such as fine precipitates and lamellar structures. To perform the microstructural analysis efficiently, image segmentation was first performed for each phase of the microstructural images. Utilizing the Trainable Weka Segmentation method based on machine learning, the required segmentation time was dramatically reduced. Furthermore, by pre-adjusting the contrast of the images, the segmentation could be performed accurately for gray phases with different shades of
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Botinha, Julia, Bodo Gehrmann, and Helena Alves. "A Theoretical Investigation on the Role of Microstructural Particularities on the Hydrogen Embrittlement of Nickel Alloys." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17718.

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Abstract Precipitation hardened (PH) nickel alloys have been extensively used in diverse applications in the oil and gas industry due to its high strengths and outstanding corrosion resistance in several aggressive environments. Despite of their known high corrosion properties, hydrogen embrittlement is one common failure reported by the industry for this class of alloys. PH nickel alloys exhibit complex microstructures, composed by diverse secondary phases. Numerous research activities to study the mechanisms behind hydrogen embrittlement have been carried out in the last years and are still
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Sisak, W. J., H. E. Chaung, and C. W. Petersen. "Corrosion and Cracking of Alloy C-276 in High Temperature Sour Brines." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92060.

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Abstract The corrosion and stress-corrosion cracking (SCC) of Alloy C-276 (UNS N10276) has been studied in high-temperature sour brines. The long-term effects of exposure to sour brines were evaluated using C-ring specimens tested at 400°F (204°C), 500°F (260°C), and 600°F (316°C) for up to 3 years. Microstructures of the C-276 samples were characterized before and after sour brine testing using TEM to evaluate the effects of initial microstructure and of temperature-related changes in microstructure on corrosion and cracking. The corrosion scales formed on exposed surfaces and within SCC crac
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Morana, Roberto, Lee Smith, and Sai P. Venkateswaran. "On the Susceptibility of Precipitation Hardened Nickel Alloys to Hydrogen Assisted Cracking." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-12846.

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Absrract Precipitation Hardened (PH) nickel alloys have been used extensively and successfully in the Oil & Gas Industry for many years. These materials offer high strength and outstanding corrosion resistance in many aggressive environments and they are a common selection for high-strength equipment for downhole, wellhead, subsea and Christmas tree applications. However, several high-profile failures have occurred, including tubing hangers, cross-overs and subsea bolts with alloys such as UNS N07718, UNS N07716 and UNS N07725. In all these cases, the mechanism identified was Hydrogen Assi
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Koko, Abdalrhaman, Wesley Bond, Rob Simpson, Maria Lodeiro, Aldo Mendieta, and Gavin Sutton. "Investigating the Microstructural Evolution of Inconel 718 under a Controlled Thermal Gradient." In AM-EPRI 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0449.

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Abstract This study demonstrates the Electro-Thermal Mechanical Testing (ETMT) system's capability to analyze the thermo-mechanical behavior of Inconel 718 (IN718) at a heating rate of 5 °C/s, achieving temperatures up to 950 °C. The temperature profile peaks at the sample's center and is approximately 25 °C at the extremes. Upon reaching 950 °C, the sample was aged for 30 hours before being rapidly quenched. This process froze the microstructure, preserving the phase transformations that occurred at various temperatures across the temperature parabolic gradient, which resulted in a complex gr
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Panda, Krutibas, Reece Goldsberry, and Brendan Voglewede. "Corrosion Characterization and Performance Evaluation of Co-Cr Alloys by Laser Powder Bed Fusion and Suitability of Their Use for Pressure Containing Down-hole Wear Components." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17580.

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Abstract Cobalt based alloys (Co-Cr-W-C) possess an attractive combination of corrosion resistance, erosion resistance and heat resistance properties. This property combination coupled with their low magnetic permeability values make them suitable for many flow components in the measurement and logging while drilling (M/LWD) systems in the oil and gas industry. However, flow components manufactured from investment cast Stellite 6 alloy (Co-Cr-W-C) have shown that they are susceptible to cracking under operating conditions due to the brittleness of the material and the complex geometry of these
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Prieto, C., D. Young, M. Singer, M. Clum, and T. J. Cyders. "Pitting Corrosion Resistance of a 316L Stainless Steel Manufactured by the Direct Metal Laser Sintering Process." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-11569.

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Abstract Direct metal laser sintering (DMLS) is an additive manufacturing process that utilizes a laser to sinter powdered metal to make geometrically complex parts. However, DMLS generally produces material with lower mechanical performance and higher anisotropy as compared to conventional manufacturing approaches of the same material. Furthermore, components made by DMLS are believed to be more vulnerable to corrosion due to the presence of residual porosity, as well as laser induced microstructural deformations. This research focuses on the evaluation of the pitting corrosion resistance of
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Vives, Solange, Charlotte Mayer, Arthur Després, Guilhem Martin, Muriel Veron, and Jean Jacques Blandin. "Microstructure And Mechanical Properties Of Additively Manufactured Pearl® Micro AD730®." In World Powder Metallurgy 2022 Congress & Exhibition. EPMA, 2022. http://dx.doi.org/10.59499/wp225371435.

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While superalloys such as IN718 have been successfully used to build complexe parts in AM, applications requiring higher service temperatures necessitate the development of alloys with increased capability. AD730® was developed as a C&W alloy with increased capability relative to wrought IN1718.This work first reveals the impact of minor elements B and Zr on LPB-F processed AD730® (promotion of solidification cracking), and the role of B regarding rupture creep resistance.The as built microstructure is completely different from the as forged alloy. This work shows how heat treatment allows
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Rangarajan, Aswath, and Veera Sundararaghavan. "Design of Microstructure Response Using a Complex Step Plasticity Approach." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39011.

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Microstructure-sensitive design is performed using a newly developed Multiscale Complex Step Method. Algorithmic implementation of the complex-step method is based on conventional multiscale Taylor or FE2 direct model, with the difference being that the microstructural deformation gradient is modeled as a complex number with a small imaginary component. We introduce methods to calculate derivatives of microstructural fields with respect to loading parameters. The sensitivities are used to identify optimal microstructures with desired elastic and plastic properties.
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Xu, Hongyi, Ruoqian Liu, Alok Choudhary, and Wei Chen. "A Machine Learning-Based Design Representation Method for Designing Heterogeneous Microstructures." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34570.

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In designing microstructural materials systems, one of the key research questions is how to represent the microstructural design space quantitatively using a descriptor set that is sufficient yet small enough to be tractable. Existing approaches describe complex microstructures either using a small set of descriptors that lack sufficient level of details, or using generic high order microstructure functions of infinite dimensionality without explicit physical meanings. We propose a new machine learning-based method for identifying the key microstructure descriptors from vast candidates as pote
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Reports on the topic "Microstructure Complexe"

1

Daniel. L52353 Materials Selection, Welding and Weld Monitoring - Optimized Welding Solutions for X100 Line Pipe. Pipeline Research Council International, Inc. (PRCI), 2012. http://dx.doi.org/10.55274/r0010650.

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Two rounds of pipe welding were completed to understand the influence of the welding parameters on the weld metal and HAZ properties and microstructure. Thermal data was also obtained from these welds. This information was used to refine the thermal microstructural model with predictive capabilities. Essential welding variables were validated on flat plate experiments and recommendations for welding process control established. Ultimately, these recommendations were evaluated by pipeline welding contractors to assess its viability for field application.
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Miller, Gregory H., and Gregory Forest. Modeling and Algorithmic Approaches to Constitutively-Complex, Microstructured Fluids. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1150221.

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Dinovitzer, Aaron. PR-214-144500-R01 Weld Hydrogen Cracking Susceptibility Characterization. Pipeline Research Council International, Inc. (PRCI), 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 we
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Diaz de la Rubia, T, M. J. Caturla, and M. J. Fluss. Dimensional Stability and Microstructure Evolution in Irradiated Systems with Complex Kinetics. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/15007305.

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Diaz de la Rubia, T., M. Caturla, and M. J. Fluss. Dimensional Stability and Microstructure Evolution in Irradiated Systems with Complex Kinetics. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/793932.

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Dinovitzer, Aaron, Morvarid Ghovanlou, and Nick Pussegoda (Archived). PR-214-123734-R01 In The Ditch Non-Destructive Mechanical Property Measurement. Pipeline Research Council International, Inc. (PRCI), 2016. http://dx.doi.org/10.55274/r0011019.

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This report describes a new approach using existing non-destructive examination (NDE) techniques to determine pipe properties when existing data and information are absent or incomplete. The research work developed a neural network-based tool making use of linepipe hardness, chemistry and microstructure information to determine pipe characteristics, including strength and toughness. This research was completed to develop a tool to fill gaps in pipeline operators' knowledge and records and provide the basis to meet the requirements of "traceable, verifiable, and complete" (TVC) records requirem
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Patchett, B. M., and A. C. Bicknell. L51706 Higher-Strength SMAW Filler Metals. Pipeline Research Council International, Inc. (PRCI), 1993. http://dx.doi.org/10.55274/r0010418.

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The welding of high strength steels in general, and for pipeline fabrication in particular, has shown that cracking due to hydrogen absorption during welding is more complex in these steels than in older, lower strength steels. In older steels, primary strengthening was accomplished with carbon, which caused hydrogen cracking in the base metal HAZ under reasonably predictable conditions involving microstructure, residual stress and hydrogen level. Pipeline steels were and are in the vanguard of change in strengthening philosophy. The change involves two areas of steel making, chemical composit
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Jung. L52232 Weld Metal Cooling Rate Prediction of Narrow Groove Pipeline Girth Welds FEA Modeling. Pipeline Research Council International, Inc. (PRCI), 2008. http://dx.doi.org/10.55274/r0011321.

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As part of a larger, DoT-sponsored program to develop optimized weld metal chemistries for X80 and X100, a finite-element approach was used to predict weld metal cooling rates and to provide a better understanding of the factors which influence them. The models can then be used to predict how changes in the welding procedure will affect the cooling rates of the weld joints. The changes in the welding procedure can include the joint details, the heat input of the weld as well as the preheating temperature. The predicted cooling rate from the model will be used as input, along with the weld meta
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Gill. L51675 Effects of Weldment Property Variations on the Behavior of Line Pipe. Pipeline Research Council International, Inc. (PRCI), 1993. http://dx.doi.org/10.55274/r0010133.

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A steel weldment is a composite of zones or layers of different microstructures that possess different material properties. The zones include the base metal (or the sections of pipe), the weld metal, and a complex heat-affected zone (HAZ) of base metal that has been exposed to a variety of thermal cycles resulting in varying microstructures. The material properties of primary concern with respect to the mechanical behavior of the pipe are the stress-strain response (the constitutive properties) and the resistance to initiation and propagation of cracks or tears in the presence of a crack, notc
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Hoelzer, David T., Rachel Seibert, and Caleb Massey. Complete Status Report Documenting the Processing, Microstructure and High-Temperature Mechanical Properties of the Nanostructured Ferritic Alloy OFRAC. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1550736.

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