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Journal articles on the topic 'Microstructure Complexe'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

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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2

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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8

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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10

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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11

Abdalla, Ayad Omran, Astuty Amrin, Roslina Mohammad, and M. A. Azmah Hanim. "Microstructural Study of Newly Designed Ti-6Al-1Fe Alloy through Deformation." Solid State Phenomena 264 (September 2017): 54–57. http://dx.doi.org/10.4028/www.scientific.net/ssp.264.54.

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Recently, iron (Fe) is introduced to substitute vanadium (V) in Ti-alloy. Therefore, new (α+β) titanium alloy, Ti-6Al-1Fe was designed through a complete replacement of V by Fe with major composition modifications of Ti-6Al-4V. This new alloy is believed could provide similar properties of Ti-6Al-4V through modification of its microstructures. Different heat treatments can lead to a diversity of microstructural permutations and combinations. Thus, it is very crucial to study in-depth understanding about the microstructure of Ti-6Al-1Fe. Results reveal that the microstructure of as-received all

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Robson, J. D., O. Engler, C. Sigli, A. Deschamps, and W. J. Poole. "Advances in Microstructural Understanding of Wrought Aluminum Alloys." Metallurgical and Materials Transactions A 51, no. 9 (2020): 4377–89. http://dx.doi.org/10.1007/s11661-020-05908-9.

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Abstract Wrought aluminum alloys are an attractive option in the quest for lightweight, recyclable, structural materials. Modern wrought aluminum alloys depend on control of complex microstructures to obtain their properties. This requires an understanding of the coupling between alloy composition, processing, and microstructure. This paper summarizes recent work to understand microstructural evolution in such alloys, utilizing the advanced characterization techniques now available such as atom probe tomography, high-resolution electron microscopy, and synchrotron X-ray diffraction and scatter

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13

Burke, M. G., and M. K. Miller. "A Comparison of Tem and Apfim to the Interpretation of Modulated Microstructures." Proceedings, annual meeting, Electron Microscopy Society of America 43 (August 1985): 70–71. http://dx.doi.org/10.1017/s042482010011742x.

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Interpretation of fine-scale microstructures containing high volume fractions of second phase is complex. In particular, microstructures developed through decomposition within low temperature miscibility gaps may be extremely fine. This paper compares the morphological interpretations of such complex microstructures by the high-resolution techniques of TEM and atom probe field-ion microscopy (APFIM).The Fe-25 at% Be alloy selected for this study was aged within the low temperature miscibility gap to form a <100> aligned two-phase microstructure. This triaxially modulated microstructure i

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Bassini, Emilio, Giulio Marchese, and Alberta Aversa. "Tailoring of the Microstructure of Laser Powder Bed Fused Inconel 718 Using Solution Annealing and Aging Treatments." Metals 11, no. 6 (2021): 921. http://dx.doi.org/10.3390/met11060921.

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Inconel 718 (IN718) is a nickel-based superalloy with high weldability and is thus ideal for being processed via laser powder bed fusion (LPBF). Unlike traditional casting, LPBF IN718 develops a complex microstructure due to the rapid solidification that characterizes this manufacturing process. As a result, LPBF microstructures are different from those expected in equilibrium conditions, and for this reason, specific heat treatments should be designed. This paper, using differential scanning calorimetry (DSC), thermal mechanical analysis (TMA), and a field emission scanning electron microscop

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Bryndza, Guillian, Jérôme Tchoufang Tchuindjang, Fan Chen, et al. "Review of the Microstructural Impact on Creep Mechanisms and Performance for Laser Powder Bed Fusion Inconel 718." Materials 18, no. 2 (2025): 276. https://doi.org/10.3390/ma18020276.

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Inconel 718 (IN718) is a polycrystalline nickel-based superalloy and one of the most widely used materials in the aerospace industry owing to its excellent mechanical performances at high temperatures, including creep resistance. Interest in additively manufactured components in aerospace is greatly increasing due to their ability to reduce material consumption, to manufacture complex parts, and to produce out-of-equilibrium microstructures, which can be beneficial for mechanical behavior. IN718’s properties are, however, very sensitive to microstructural features, which strongly depend on the

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16

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

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

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17

Snopiński, Przemysław, Krzysztof Matus, and Ondřej Hilšer. "Investigation of the Effects of Various Severe Plastic Deformation Techniques on the Microstructure of Laser Powder Bed Fusion AlSi10Mg Alloy." Materials 16, no. 23 (2023): 7418. http://dx.doi.org/10.3390/ma16237418.

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In this paper, we present a complete characterization of the microstructural changes that occur in an LPBF AlSi10Mg alloy subjected to various post-processing methods, including equal-channel angular pressing (ECAP), KoBo extrusion, and multi-axial forging. Kikuchi transmission diffraction and transmission electron microscopy were used to examine the microstructures. Our findings revealed that multi-axis forging produced an extremely fine subgrain structure. KoBo extrusion resulted in a practically dislocation-free microstructure. ECAP processing at temperatures between 100 °C and 200 °C gener

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18

Baraboshkin, Kirill, Ruslan Adigamov, Vladimir Yusupov, Irina Kozhevnikova, and Antonina Karlina. "Thermomechanical rolling in well casing production (research review)." Metal Working and Material Science 26, no. 3 (2024): 24–51. http://dx.doi.org/10.17212/1994-6309-2024-26.3-24-51.

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Introduction. The modern oil and gas industry requires the development of high strength materials for well casing. Changes in rolled steel production technologies are one of the urgent tasks. Reducing the cost of high quality steel well casing is becoming a major challenge for the oil and gas industry. Multiphase microstructures containing acicular ferrite or an acicular ferrite-dominated phase exhibit good complex properties in HSLA steels. This paper focuses on the results obtained using modern methods of thermomechanical rolling. Results and discussion. This work analyzes the characteristic

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19

Regone, Wiliam, and Sérgio Tonini Button. "Effects of deformation on the microstructure of a Ti-V microalloyed steel in the phase transition region." Rem: Revista Escola de Minas 57, no. 4 (2004): 303–11. http://dx.doi.org/10.1590/s0370-44672004000400014.

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Microalloyed steels are used in the forging of many automotive parts like crankshafts and connecting rods. They are hot worked in a sequence of stages that includes the heating to the soaking temperature, followed by forging steps, and finally the controlled cooling to define the microstructure and mechanical properties. In this work it was investigated the thermomechanical behavior and the microstructural evolution of a Ti-V microalloyed steel in the phase transition region. Torsion tests were done with multiple steps with true strain equal to 0.26 in each step. After each torsion step the sa

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Silva, M. A., and J. N. F. Holanda. "Electrical Porcelain Containing Ornamental Rock Waste: Microstructural Development." Materials Science Forum 660-661 (October 2010): 692–96. http://dx.doi.org/10.4028/www.scientific.net/msf.660-661.692.

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Aluminous electrical porcelains are used in the production of materials of high voltage insulators. The microstructure plays an important role in the performance of electrical porcelain. On the other hand, the porcelain materials undergo a series of physical and chemical transformations during firing. This makes the understanding of their microstructures rather complex. In this work was studied the microstructural development of electrical porcelain containing up to 35 wt.% of ornamental rock waste. The pieces ceramics were pressed at 50 MPa and sintered at 1300 °C. The porcelain pieces were c

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Rodriguez, Salvador Valtierra, Michael Greenwood, Delin Li, et al. "Phase-field modeling of austenitic steels used in turbines." IOP Conference Series: Materials Science and Engineering 1281, no. 1 (2023): 012047. http://dx.doi.org/10.1088/1757-899x/1281/1/012047.

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Abstract The performance in hydro-electric turbine casting and repair requires understanding of how process parameters and chemistry selection affect solidification microstructures. The aim of this study is to provide a quantitative phase-field formulation for process-microstructure relationships that seeks to model stainless steels. We have developed a phase-field model to simulate austenitic stainless steel solidification under experimental thermal histories. To this end we look at a pseudo-binary approximations for numerical efficiency. The pseudo-binary formulation is underpinned by the al

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Sfikas, Athanasios K., Spyros Kamnis, Martin C. H. Tse, et al. "Microstructural Evaluation of Thermal-Sprayed CoCrFeMnNi0.8V High-Entropy Alloy Coatings." Coatings 13, no. 6 (2023): 1004. http://dx.doi.org/10.3390/coatings13061004.

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The aim of this work is to improve the understanding of the effect of the cooling rate on the microstructure of high-entropy alloys, with a focus on high-entropy alloy coatings, by using a combined computational and experimental validation approach. CoCrFeMnNi0.8V coatings were deposited on a steel substrate with high velocity oxy-air-fuel spray with the employment of three different deposition temperatures. The microstructures of the coatings were studied and compared with the microstructure of the equivalent bulk high-entropy alloy fabricated by suction casting and powder fabricated by gas a

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Yamane, Gen, Vincent Velay, Vanessa Vidal, and Hiroaki Matsumoto. "Mechanical Behavior of Ti-6Al-2Sn-4Zr-2Mo Titanium Alloy under Hot and Superplastic Forming Conditions: Experiment and Modeling." Defect and Diffusion Forum 385 (July 2018): 413–18. http://dx.doi.org/10.4028/www.scientific.net/ddf.385.413.

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Titanium alloys are widely used in the aircraft industry. Under sheets form, they can be employed to the manufacturing of pylon or engine parts. With the aim of a cost reduction, this study proposes to act on the starting microstructure so as to improve the mechanical properties during the forming stages. In the present study, investigations are focused on Ti-6Al-2Sn-4Zr-2Mo (Ti6242) alloy specially used for the hot areas (e.g. parts close to the engine or the combustion chambe...). Presently, an important mechanical test campaign was performed on Ti6242 alloy, it examines, on the one hand, th

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Jirková, Hana, David Aišman, Indrani Sen, et al. "Mini-Thixoforming of a Steel Produced by Powder Metallurgy." Solid State Phenomena 192-193 (October 2012): 500–505. http://dx.doi.org/10.4028/www.scientific.net/ssp.192-193.500.

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Semi-solid processing is complicated by various inherent technical problems. However, once these problems are solved, thixoforming allows intricately shaped components to be manufactured very effectively – often with microstructures that cannot be produced by any other techniques. The recently introduced mini-thixoforming method is an example of such a novel technique for semi-solid processing of steel. The wall thicknesses of resulting parts are about 1 mm. Microstructures of semi-solid-processed steels typically consist of a high proportion of globular particles of metastable austenite embed

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Iza-Mendia, Amaia, and Isabel Gutiérrez. "Microstructure-Mechanical Properties Relationships for Complex Microstructures in High Strength Steels." Materials Science Forum 783-786 (May 2014): 783–88. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.783.

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Due to the increased complexity of steel microstructures, when considering the application of available Hall-Petch type equations for yield strength prediction, a number of difficulties raises. For example, the correlation between grain size measurements by EBSD technique and optical microscopy (OP) in complex microstructures is required in order to integrate data to the traditional equations developed for OP results and ferrite-pearlite microstructures. Besides, the introduction of some additional terms to the equations to account for precipitation, C in solution and forest dislocation contri

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Liu, Lishuai, Peng Wu, Yanxun Xiang, and Fu-Zhen Xuan. "Autonomous characterization of grain size distribution using nonlinear Lamb waves based on deep learning." Journal of the Acoustical Society of America 152, no. 3 (2022): 1913–21. http://dx.doi.org/10.1121/10.0014289.

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Characterization of grain microstructures of metallic materials is crucial to materials science and engineering applications. Unfortunately, the universal electron microscopic methodologies can only capture two-dimensional local observations of the microstructures in a time-consuming destructive way. In this regard, the nonlinear ultrasonic technique shows the potential for efficient and nondestructive microstructure characterization due to its high sensitivity to microstructural features of materials, but is hindered by the ill-posed inverse problem for multiparameter estimation induced by th

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

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

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di Schino, Andrea, and Mauro Guagnelli. "Metallurgical Design of High Strength/High Toughness Steels." Materials Science Forum 706-709 (January 2012): 2084–89. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.2084.

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The proper balance between yield strength, YS, and ductile to brittle transition temperature, DBTT, has been the main concern during development of high strength engineering steels and the effect of microstructure on impact toughness has attracted a great attention during the last decades. In this paper a review concerning the relationship between strength and toughness in steels will be presented and the effect of different microstructural parameters will be discussed, aiming toimprovesuch properties in designingnewhigh strength steels. Complex microstructures, obtained by quenching and tempe

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Nolan, T. P., R. Sinclair, T. Yamashita, and R. Ranjan. "Correlation of microstructural and magnetic properties of longitudinal recording media using TEM." Proceedings, annual meeting, Electron Microscopy Society of America 51 (August 1, 1993): 1016–17. http://dx.doi.org/10.1017/s0424820100150915.

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Cobalt alloy on chromium thin film media are used in industry because of their large values of coercivity (Hc), remanent magnetization (Mr), squareness (S*), and relatively low noise. The magnetic properties depend strongly on processing conditions and, as will be shown, the resulting microstructure.A complete structure-processing-properties analysis requires effective measurement of both magnetic and microstructural properties. Direct micromagnetic-microstructural comparison is not yet readily available, but bulk hysteresis loop parameters are reproducible and highly correlated with both desi

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Hanhan, Imad, and Michael D. Sangid. "Design of Low Cost Carbon Fiber Composites via Examining the Micromechanical Stress Distributions in A42 Bean-Shaped versus T650 Circular Fibers." Journal of Composites Science 5, no. 11 (2021): 294. http://dx.doi.org/10.3390/jcs5110294.

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Recent advancements have led to new polyacrylonitrile carbon fiber precursors which reduce production costs, yet lead to bean-shaped cross-sections. While these bean-shaped fibers have comparable stiffness and ultimate strength values to typical carbon fibers, their unique morphology results in varying in-plane orientations and different microstructural stress distributions under loading, which are not well understood and can limit failure strength under complex loading scenarios. Therefore, this work used finite element simulations to compare longitudinal stress distributions in A42 (bean-sha

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Sun, Jia, Lingyan Zhao, Huaxin Liang та ін. "A Review on Phase Field Modeling for Formation of η-Cu6Sn5 Intermetallic". Metals 12, № 12 (2022): 2043. http://dx.doi.org/10.3390/met12122043.

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Formation of intermetallic compounds (IMCs) exhibits remarkable microstructural features and provides opportunities for microstructure control of microelectronic interconnects. Excessive formation of brittle IMCs at the Cu/Sn interface such as η-Cu6Sn5 can deteriorate the reliability and in turn lead to solder joint failure in the Pb-free Sn-based solder joints. Phase field method is a versatile tool for prediction of the mesoscopic structure evolution in solders, which does not require tracking interfaces. The relationships between the microstructures, reliability and wettability were widely

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Go Roa, Stewart M., Eduardo Magdaluyo Jr., and Wojciech Gierlotka. "Microstructural Characterization and Properties of Sn-Ag-Cu (SAC) Compound Induced by Zn Alloying." Nano Hybrids and Composites 16 (June 2017): 33–36. http://dx.doi.org/10.4028/www.scientific.net/nhc.16.33.

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The microstructural properties and intermetallic (IMC) formation of Sn-Ag-Cu (SAC) through varying amounts of zinc were examined in this study while having tin held at constant composition. Samples were prepared and heated in a furnace for 168 hours to achieve complete solidification and homogenization. Results showed relatively fine microstructure primarily containing Sn dendrites, eutectic, and pro-eutectic phases. Microstructures for each alloy was similar for which majority of them formed copper-based IMCs and Sn dendrites. The alloy (0.7Sn-0.15Ag-0.1Cu-0.05Zn) containing minimal amount of

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Bandaru, Pravallika, Saswata Bhattacharyya, and Shourya Dutta-Gupta. "Insights into propagating surface plasmons in Ag–Cu alloy thin films: Enhancement of spin angular momentum of light." Journal of Applied Physics 132, no. 18 (2022): 183101. http://dx.doi.org/10.1063/5.0119124.

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Surface plasmon polaritons (SPPs) can be supported by metal–dielectric interfaces and have been exploited for various applications. Typically, most studies deal with plasmons excited in pure metallic films or homogenous alloy thin films and the understanding of plasmon behavior in films with complex microstructures is limited. In this work, we numerically study the surface plasmons that are supported at the interface of an Ag–Cu alloy film that undergoes spinodal decomposition to produce a two-phase microstructure, when an initially compositionally homogenous alloy film (with composition withi

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34

Wusatowska-Sarnek, Agnieszka M., Gautam Ghosh, Gregory B. Olson, Martin J. Blackburn, and Mark Aindow. "Characterization of the microstructure and phase equilibria calculations for the powder metallurgy superalloy IN100." Journal of Materials Research 18, no. 11 (2003): 2653–63. http://dx.doi.org/10.1557/jmr.2003.0371.

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The microstructure of the Ni-based superalloy IN100 processed by a powder metallurgy route was evaluated to reveal the structures, volume fractions, distributions, and chemistries of the various phases present. These data were compared with those predicted by computational thermodynamics. It is shown that the microstructural parameters expected on the basis of global equilibrium conditions differ significantly from those measured experimentally. However, modification of these calculations by use of constrained and successive equilibria compensated for kinetic effects and led to accurate (or be

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Rakesh, C., Ravi Babu T., Vandna Kumari, Sonali Jayronia, Fouad A. Al-Saady, and Amandeep Nagpal. "Multiscale Characterization of Microstructural Evolution in Powder Metallurgy and Ceramic Forming Processes." E3S Web of Conferences 430 (2023): 01128. http://dx.doi.org/10.1051/e3sconf/202343001128.

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The microstructural evolution of materials during powder metallurgy and ceramic forming processes is a complex phenomenon that spans multiple length scales. In this study, we present a comprehensive multiscale characterization of the microstructural changes occurring during these processes. We employ a combination of advanced experimental techniques, including high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and X-ray diffraction (XRD), to investigate the microstructural features at various length scales. Our results reveal the intricate interplay b

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Kučerová, Ludmila, Martin Bystrianský, and Josef Káňa. "The Effect of Isothermal Hold Temperature on Microstructure and Mechanical Properties of TRIP Steel." Solid State Phenomena 270 (November 2017): 253–57. http://dx.doi.org/10.4028/www.scientific.net/ssp.270.253.

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TRIP (transformation induced plasticity) steels are low alloyed low carbon steels with complex microstructures consisting of ferrite, bainite and retained austenite. This complex microstructure provides them with excellent strength to ductility balance, making them a member of advanced high strength steels (AHSS) group. Suitable microstructure can be obtained by either heat or thermo-mechanical treatment. A hold in bainite transformation region is an integral part of any form of commercial TRIP steel processing route, as it enables formation of sufficient volume fraction of bainite and also st

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Fan, Y., W. Tian, Y. Guo, Z. Sun, and J. Xu. "Relationships among the Microstructure, Mechanical Properties, and Fatigue Behavior in Thin Ti6Al4V." Advances in Materials Science and Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/7278267.

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The microstructures of Ti6Al4V are complex and strongly affect its mechanical properties and fatigue behavior. This paper investigates the role of microstructure on mechanical and fatigue properties of thin-section Ti6Al4V sheets, with the aim of reviewing the effects of microstructure on fatigue properties where suboptimal microstructures might result following heat treatment of assemblies that may not be suited to further annealing, for example, following laser welding. Samples of Ti6Al4V sheet were subjected to a range of heat treatments, including annealing and water quenching from tempera

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Aroca, V. P., C. Philippot, J. Pujante, D. Frómeta, F. G. Caballero, and C. Capdevila. "Crashworthiness evaluation of press hardened steels with different lath-like microstructures." IOP Conference Series: Materials Science and Engineering 1284, no. 1 (2023): 012034. http://dx.doi.org/10.1088/1757-899x/1284/1/012034.

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Abstract The deployment of Press Hardened Steels (PHSs) in the Body-In-White structures that took place during the two last decades is at the origin of a breakthrough weight saving on vehicles while guaranteeing the safety requirements of the automotive industry. The production of parts with complex shapes and a high strength between 1500-2000MPa was made possible by taking advantage of the hot rheology of austenite combined with the fast cooling obtained by in-die quenching leading to auto-tempered martensitic microstructures. In the present work, PHS1500 was hot stamped with different thermo

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Sakharova, Nataliya A., and José Valdemar Fernandes. "Dislocation Microstructure in Copper Multicrystals Deformed under the Sequences: Rolling - Tension and Tension - Rolling." Materials Science Forum 514-516 (May 2006): 589–93. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.589.

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The microstructure evolution of copper multicrystalline sheets, undergoing plastic deformation in the sequences of strain paths rolling – tension and tension – rolling, was studied in the present work. For both sequences, two different types of change of strain path were studied: the tensile and rolling directions were parallel and normal to each other. Samples submitted to these four complex strain paths were investigated by transmission electron microscopy (TEM). TEM observations have shown the typical dislocations microstructures for the prestrain paths in tension and rolling. The dislocati

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Malik, Affan, Danqi Qu, and Hui-Chia Yu. "Smoothed Boundary Method Electrochemical Simulation Framework for Complex Electrode Microstructures." ECS Meeting Abstracts MA2022-01, no. 46 (2022): 1968. http://dx.doi.org/10.1149/ma2022-01461968mtgabs.

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Battery and fuel cell electrodes possess highly complex microstructures: tortuous interparticle space, irregular particle surfaces, and various particle sizes. Additionally, coupled physical mechanisms, such as mass transport and electron transport, heat generation, and phase transformations, simultaneously occur during the electrode’s operations. All these combined complexity makes modeling electrochemical processes with explicit considerations of electrode microstructures very challenging. As such, electrode designs are still heavily relied on experimental trial-and-error methods even though

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Ramakrishna R, VSM, and JP Gautam. "Optimization of post weld heat treatment cycle of fiber laser welded bainitic steel." E3S Web of Conferences 184 (2020): 01039. http://dx.doi.org/10.1051/e3sconf/202018401039.

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Automobile industry has always been in look out for advanced materials that would account for greater crash resistance, high fatigue strength, optimum ductility and longer service life despite heavy mechanical loads applied on these engine components. These critical requirements are met through maintaining the complex microstructures and optimum phase constituents. The retention of microstructural constituents has always been a key parameter while fabricating these advanced automobile materials by fusion welding process. Carbide free bainitic steels are emerging out to be the candidate materia

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Fuentes, Sandrine. "LA TRADUCTION DES NOMS DE PROFESSION DANS UN SYSTÈME DE DICTIONNAIRES ÉLECTRONIQUES COORDONNÉS (ES-FR)." Verbum 7, no. 7 (2016): 66. http://dx.doi.org/10.15388/verb.2016.7.10259.

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Dans cet article, nous nous attachons à la problématique posée par la traduction des noms de professions de l’espagnol vers le français et ce, dans une perspective de Traitement Automatique des Langues (TAL). Malgré la proximité linguistique des deux langues mises en regard, des obstacles d’ordre général comme la polysémie ou le figement et d’autres plus spécifiques comme le haut degré de technicité des termes concernés ou encore la structure interne complexe des syntagmes terminologiques peuvent entraver le processus de traduction automatique. C’est pourquoi il est nécessaire de fournir au

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Fuentes, Sandrine. "LA TRADUCTION DES NOMS DE PROFESSION DANS UN SYSTÈME DE DICTIONNAIRES ÉLECTRONIQUES COORDONNÉS (ES-FR)." Verbum 7, no. 7 (2016): 66. http://dx.doi.org/10.15388/verb.2016.7.10287.

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Dans cet article, nous nous attachons à la problématique posée par la traduction des noms de professions de l’espagnol vers le français et ce, dans une perspective de Traitement Automatique des Langues (TAL). Malgré la proximité linguistique des deux langues mises en regard, des obstacles d’ordre général comme la polysémie ou le figement et d’autres plus spécifiques comme le haut degré de technicité des termes concernés ou encore la structure interne complexe des syntagmes terminologiques peuvent entraver le processus de traduction automatique. C’est pourquoi il est nécessaire de fournir au

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Chen, Ming, Xiaodong Hu, Hongyang Zhao, and Dongying Ju. "Recrystallization Microstructure Prediction of a Hot-Rolled AZ31 Magnesium Alloy Sheet by Using the Cellular Automata Method." Mathematical Problems in Engineering 2019 (September 16, 2019): 1–15. http://dx.doi.org/10.1155/2019/1484098.

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

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Choudhury, Amitava, Snehanshu Pal, Ruchira Naskar, and Amitava Basumallick. "Computer vision approach for phase identification from steel microstructure." Engineering Computations 36, no. 6 (2019): 1913–33. http://dx.doi.org/10.1108/ec-11-2018-0498.

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PurposeThe purpose of this paper is to develop an automated phase segmentation model from complex microstructure. The mechanical and physical properties of metals and alloys are influenced by their microstructure, and therefore the investigation of microstructure is essential. Coexistence of random or sometimes patterned distribution of different microstructural features such as phase, grains and defects makes microstructure highly complex, and accordingly identification or recognition of individual phase, grains and defects within a microstructure is difficult.Design/methodology/approachIn th

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Cai, Wen Zhong, Shan Tung Tu, Yang Yan Zheng, and Jian Ming Gong. "Microstructure Reconstruction and Numerical Simulation of Deformation in Particle-Reinforced Composites." Key Engineering Materials 353-358 (September 2007): 567–70. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.567.

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A new methodology of computer simulation is proposed to perform finite element (FE) calculations of uniaxial tensile deformation on the three-dimensional (3D) complex microstructures, through its application to the microstructure of aluminum matrix containing randomly distributed and oriented SiC particles of highly variable and angular geometry. Compared with the simplified microstructure model, the complex microstructure model shows significant differences in terms of micromechanical fields and macroscopic uniaxial deformation. The results reveal that a quantitative and convenient reconstruc

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Zhao, Chang Song, Jun Yong Wu, Fan Zhong Chu, Kai Rui Zhao, and Lei Yu. "Study on Preparation of Microstructured Optical Membrane." Key Engineering Materials 861 (September 2020): 159–64. http://dx.doi.org/10.4028/www.scientific.net/kem.861.159.

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Micro-structured optical film is one of the micro-optical elements and has a great market demand. This article studies the microstructured optical film formed by UV imprinting: The influence of embossing pressure on microstructure replication accuracy was explored. The larger the pressure, the better the material filling. When the pressure is 5N, the microstructure replication is complete; The relationship between the radiation intensity and warpage deformation was explored, and the decrease in the intensity of the UV light source can effectively reduce the warpage deformation; The influence o

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Larzabal, Gorka, Nerea Isasti, J. M. Rodriguez-Ibabe, Isabel Gutiérrez, and P. Uranga. "Effect of the Time between Last Deformation Pass and Accelerated Cooling on the Mechanical Properties in Nb and Nb-Mo Microalloyed Steels." Key Engineering Materials 716 (October 2016): 281–90. http://dx.doi.org/10.4028/www.scientific.net/kem.716.281.

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The microstructural refinement induced when the holding time between last deformation pass and accelerated cooling is reduced, affects the mechanical properties in low carbon Nb and Nb-Mo microalloyed steels. Plane strain compression tests were performed and mechanical property samples machined in order to quantify this effect using tensile and Charpy impact tests. A complete microstructural characterization was carried out using electron backscattered diffraction (EBSD) measuring unit size distributions and homogeneity of complex microstructures. The synergetic combination of Nb and Mo elemen

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da Silva, Elisabete Pinto, Wei Xu, Cecilia Föjer, Yvan Houbaert, Jilt Sietsma, and Roumen H. Petrov. "Combined Martensite and Bainite Formation from Austenite Decomposition in HSLA Steel." Advanced Materials Research 922 (May 2014): 682–87. http://dx.doi.org/10.4028/www.scientific.net/amr.922.682.

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Recent studies have shown the possibility to induce time-dependent phase transformations during isothermal treatment between the martensite start (MS)temperature and martensite finish(Mf,)temperature, i.e. after initial martensite formation. Such treatments result in specific complex microstructures consisting of bainite, martensite and retained austenite, depending on the holding temperature and time. However, the nature of the isothermal transformations belowMSis not completely understood and issues like isothermal formation of martensite and bainite formation are still under discussion. The

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Gao, Junjie, Daiying Deng, Haitao Han, and Jijun Yu. "Microstructure Evolution and Multiscale Heat Transfer Characteristics of Resin-Based Ablative Material under Aerodynamic Heating." International Journal of Aerospace Engineering 2023 (October 16, 2023): 1–21. http://dx.doi.org/10.1155/2023/9069416.

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This paper is aimed at investigating the microstructure evolution of resin-based ablative materials under aerodynamic heating. The microstructure, morphology, material density, and thermophysical parameters at different positions of the material after aerodynamic heating were deeply studied. The changes in the microstructural characteristics of materials caused by complex reaction processes were investigated, including microstructural morphology, porosity, the overlap relationship between microstructural components, and the mutual positional relationship. The relationship between microstructur

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