Literatura científica selecionada sobre o tema "Texture de recristallisation"
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Artigos de revistas sobre o assunto "Texture de recristallisation"
Baudin, T., A. Vadon, R. Penelle e J. J. Heizmann. "Caractérisation de la Texture de Recristallisation Primaire d'une Tole de Fe3%Si (Nuance HiB)". Le Journal de Physique IV 05, n.º C3 (abril de 1995): C3–285—C3–290. http://dx.doi.org/10.1051/jp4:1995328.
Texto completo da fonteRouag, N., e R. Penelle. "Prévision de Comportement en Recristallisation Secondaire des Grains d'Orientation <001;> dans Fe3%Si à partir de la Fonction Texture du Matériau". Le Journal de Physique IV 05, n.º C3 (abril de 1995): C3–115—C3–127. http://dx.doi.org/10.1051/jp4:1995310.
Texto completo da fonteVigna, G., N. Rouag e R. Penelle. "Évolution des caractéristiques des joints de grains en fonction de la texture cristallographique au cours de la recristallisation secondaire de tôles de Fe - 3 % Si". Matériaux & Techniques 76, n.º 9-10 (1988): 36–38. http://dx.doi.org/10.1051/mattech/198876090036.
Texto completo da fonteBaudin, T., P. Paillard e R. Penelle. "Caractérisation de la texture de recristallisation primaire et de la spécialité des joints de grains de tôles de Fe-3%Si par diffraction des electrons rétrodiffusés". Journal of Applied Crystallography 25, n.º 3 (1 de junho de 1992): 400–408. http://dx.doi.org/10.1107/s0021889891014553.
Texto completo da fonteFrancillette, H., e D. Ansel. "Influence du trajet de chargement sur l’évolution de texture de la phase α d’une tôle de Ti-6Al-4V après laminage à froid et recristallisation à 1025 °C". Matériaux & Techniques 93, n.º 5-6 (maio de 2005): 137–43. http://dx.doi.org/10.1051/mattech:2005002.
Texto completo da fontePaillard, P., T. Baudin e R. Penelle. "Simulation et Caractérisation des Textures de Recristallisation d'un Alliage Fer 3% de Silicium Obtenu par Coulée Directe en Bande Mince". Le Journal de Physique IV 05, n.º C3 (abril de 1995): C3–77—C3–86. http://dx.doi.org/10.1051/jp4:1995307.
Texto completo da fonteTeses / dissertações sobre o assunto "Texture de recristallisation"
Zhu, Kangying. "Etude des mécanismes de déformation et de recristallisation dans un alliage de zirconium". Paris 13, 2006. http://www.theses.fr/2006PA132021.
Texto completo da fontePiekos, Kristian. "Modéllisation de la recristallisation dans les métaux : prévision des cinétiques et des évolutions des texture et de microstructure". Paris 13, 2006. http://www.theses.fr/2006PA132011.
Texto completo da fonteBertrand, Drira Chloé. "Optimisation de la texture de catalyseurs zéolithiques pour l'oligomérisation des oléfines". Thesis, Montpellier, Ecole nationale supérieure de chimie, 2014. http://www.theses.fr/2014ENCM0002/document.
Texto completo da fonteRecently the demand in diesel has been exceeding the production of European refineries and, inversely for gasoline. The objective of this thesis is to increase the value of the gasoline excess and meet the demand in diesel using the olefin oligomerization process. We focused on the oligomerization of pentene, which can transform into heavier molecules from 10 to 25/30 carbon atoms in contact with a solid acid catalyst . We chose zeolites as catalysts and more specifically mordenite. To improve the molecular transport to the active sites we have modified the mordenite texture by creating a secondary mesoporous framework inside the crystals, using two different post-synthesis treatments: desilication and recrystallization. Desilication treatment generates intra and inter-crystalline mesopores (from 10 nm to 100 nm diameter) by partial dissolution of the zeolite in the presence of a basic solution. Recrystallization creates a well-organized mesoporosity with a uniform diameter (small mesopores of 4 nm) due to the use of an organic template of mesopores under hydrothermal conditions. Starting from the same parent mordenite we obtained micro-mesoporous mordenites with different textures, porosity and acidity properties depending on the treatment. Finally, after the development of the experimental pilot, we compared the performance (conversion, stability, selectivity, yield in oligomers C15-C20+, branching degree of the products) of our optimized catalysts of micro-mesoporous mordenite with some reference catalysts in order to establish relations between structure-acidity and catalytic performance. We highlighted the positive impact of the introduction of mesopores in the catalyst on the conversion, stability and yield in oligomers C15-C20+. A methodology to characterize the branching degree of the products has also been developed for completing the analysis of catalytic performances
Hary, Benjamin. "Compréhension et modélisation de l'influence du taux de renforts et de la texture de déformation sur la recristallisation des aciers ODS ferritiques". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS339/document.
Texto completo da fonteOxide dispersion strengthened steels are considered as cladding materials for Sodium Fast Reactor. Due to the nano-precipitates incorporated within the microstructure, their mechanical properties are very high, especially under creep loading. Moreover, the ferritic-martensitic lattice gives ODS steels a remarkable swelling resistance under radiation. The manufacturing route of ferritic ODS steels is complex and induces a strong morphologic and crystallographic texture. The microstructure needs to be recrystallized but this recrystallization is often heterogeneous and difficult to control. In this framework, this investigation aims at achieving a better understanding of the recrystallization mechanisms in ODS steels that strongly rely both on the nano-oxydes concentration and the applied deformation. Thereby, several model grades with various concentrations of oxydes were elaborated and characterized at different scales (EBSD, SANS, DSC). It appears that the chemical composition of the nano-oxydes strongly influence the microstructure stability and its ability to recover after consolidation. Throughout this study, the strong relationship between the cold-deformation path, the stored energy distribution and the recrystallized microstructure has been highlighted. When the thermo-mechanical treatment is optimal, homogeneous recrystallized microstructures weakly textured can be achieved. Experiments also showed that decreasing the nano-oxydes concentration does not clearly favor recrystallization. Monte Carlo modelling was performed to simulate grain growth and recrystallization in the presence of second phase particles and the simulations helped to identify the mechanisms that occur experimentally. Furthermore, the tensile properties of different metallurgical states were investigated and it came out that the recrystallization notably increases the ductility at high temperature without significantly affecting the yield strength. The results obtained on model materials allowed to achieve a better understanding of the mechanisms implied in the recrystallization process of ODS steels. Several possible optimizations to the current manufacturing route are discussed from the conclusions of this study
Yazidi, Samir. "Influence du caractère de spécialité des joints de grains sur la texture granulaire et la texture de joints dans l'oxyde de nickel". Paris 11, 1988. http://www.theses.fr/1988PA112155.
Texto completo da fonteThe purpose of this study is to verity whether the intrinsic properties of special and general grain boundaries (GB) may influence such characteristics as grain texture and grain boundary texture, during grain growth process in a polycristalline material. Three parameters are of importance: -average grain diameter which is an indicator of the residual driving force responsible for grain growth; -average grain growth rate, since GB mobility is a discriminative factor for special and general GB behavior and is a function of impurity conten; -specialness character Of the GB's which allows their classification. In order to examine the influence of the first two parameters, about 250 GB's belonging to several samples prepared by oxidation of nickel in various conditions, were characterized. The data which were obtained up to now do not seem to indicate that the specialness character of the, grain boundaries influences significantly grain texture or GB texture. This conclusion can be explained by topological requirements relative to a polycrystal tree of external stresses
Dewobroto, Natanael. "Etude de l'évolution de texture lors de la recristallisation et de la croissance de grains d'alliages de titane et de zirconium". Metz, 2004. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2004/Dewobroto.Natanael.SMZ0412.pdf.
Texto completo da fonteThe objective is to explain mechanisms leading to texture change during annealing for commercially pure Ti (T40) and a zirconium alloy (Zr702) by making relationships between phenomena occurred during deformation, recrystallization and grain growth. In this experimental study, X-Ray goniometry SEM-EBSD and TEM were used to give complete descriptions on microstructure and texture evolution from deformed state until grain growth stage. Texture evolution for both materials are similar during cold rolling and annealing. Texture changes mainly during grain growth. Recrystallization changes slightly the rolling texture (maxima at {Phi1=0° PHI Phi2=0°}. Different deformation behaviors of both materials during cold rolling give differences in recrystallization mechanisms. T40 and Zr702 showed a not oriented nucleation. The slight growth selection since recrystallization stage develops the texture component {Phi1=0° PHI Phi2=30°} which becomes main component at advanced stage of grain growth. T40 evolves by normal grain growth for annealing temperature at 600, 700 and 800°C. Grain growth kinetics parameters for T40 were determined. Zr702 showed lower grain growth kinetics due to precipitates which are also the responsible for abnormal grain growth when heat treatments were done for long time at 800°C
Mavrikakis, Nikolaos. "Effect of nano-segregation of tin on recrystallisation and grain growth in automotive steels". Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0545.
Texto completo da fonteThis Ph.D. thesis investigates the effect of Sn solute segregation on the formation of recrystallisation texture in ferritic alloys. Both electron back-scatter diffraction and atom probe tomography were used to investigate the texture development and the local solute segregation respectively. In-situ electron back-scatter diffraction reveals that the strain heterogeneity in the deformed microstructure is a crucial factor for subsequent annealing, especially in the solute added alloys. Solute was found to have a profound effect on the annealing texture. Mainly, Sn was shown to affect the annealing phenomena via solute-dislocation interaction and grain boundary segregation. Direct observations with atom probe tomography reveal and quantify the levels of segregation at grain boundaries during the development of the recrystallised microstructure. The role of segregation at each stage of recrystallisation is discussed and a strong effect at the recrystallisation nucleation stage is suggested. Atom probe tomography results in combination with atomistic modelling of equilibrium segregation, concluded that the segregation depends on the misorientation. Nonetheless, the solute segregation in high-angle grain boundaries was found to be independent of their geometric characteristics (i.e. general, special grain boundaries). Finally, texture development could be explained in terms of the oriented nucleation theory of recrystallisation, while the presence of some mobile interfaces may subsequently also contribute in the oriented growth of some recrystallised grains
HENRY, JEAN. "Influence de l'etat de precipitation sur la formation de la texture de recristallisation dans un acier sans interstitiel microallie au niobium". Paris 11, 1995. http://www.theses.fr/1995PA112139.
Texto completo da fonteDewobroto, Natanael Wagner Francis. "Etude de l'évolution de texture lors de la recristallisation et de la croissance de grains d'alliages de titane et de zirconium". Metz : Université Metz, 2008. ftp://ftp.scd.univ-metz.fr/pub/Theses/2004/Dewobroto.Natanael.SMZ0412.pdf.
Texto completo da fonteChhann, Sorphal. "Etude de la recristallisation de l'Invar (alliage Fe-36%Ni) déformé par laminage asymétrique". Paris 11, 2007. http://www.theses.fr/2007PA112105.
Texto completo da fonteLn this study, we are interested in the development of recrystallized texture of invar deformed by asymmetrical rolling. The texture and the microstructure have been characterized at different scales using XXray and neutron diffraction, Scanning Electron Microscopy (SEM) associated with Electron Back Scattered Diffraction (EBSD) and Transmission Electron Microscopy (TEM). The deformed microstructure consists of elongated bands with a dislocation network substructure. There is not any cellular substructure. Concerning the texture, classical rolling components are obtained. However, in the case of the one-way asymmetrical rolling, the texture is Iightly turned around the transverse direction. After annealing, the recrystallized grains are more or less equiaxe, and the texture contained a large fraction of the cubic component associated with its twin. For the same thickness reduction, the acuity of the cubic component is larger after asymmetrical rolling than after symmetrical rolling. Concerning the microstructure evolution during annealing, we have observed the evolution of the dislocation networks into cellular substructures. Recovery is faster in the grains with the éubic orientation. As a consequence, the difference in stored energy between grains with the cubic orientation and the other orientation increases and explain the nucleation b Strain Induced Bounda Mi ration SIBM mechanism