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Partager le résultat de cette recherche Interroger des sources externesCaractérisation par électron Back Scattering diffraction(EBSD) de l'évolution des textures de déformation en traction d'un acier doux / Abdelhak Ayad
Titre : Caractérisation par électron Back Scattering diffraction(EBSD) de l'évolution des textures de déformation en traction d'un acier doux Type de document : texte imprimé Auteurs : Abdelhak Ayad, Auteur ; N. Rouag, Directeur de thèse ; Univ. de Constantine, Éditeur scientifique Année de publication : 2005 Importance : 110 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale 01 CD Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Texture Acier Déformation plastique EBSD Plastic deformation Low-carbon steel البنية النسيجية التشوه اللذن الفولاذ Index. décimale : 530 Physique Résumé : The present study examines deformation textures in a low-carbon steel. Electron Back-Scattering Diffraction (EBSD) has been used in order to follow the evolution of the texture. EBSD is a local analysis technique performed in a Scanning Electron Microscope. This technique was developed as a result of the progress made in electronic imagery and image analysis. It is useful methode for microstructure progress and characterisation. In this study, the non-deformed material shows a {111} -fibre texture (known as γ-fibre), with one dominant orientation {111}<110>.
Generaly a material with this texture has good formability. Its deformation aptitude may thus be related to the evolution of this texture component. To follow the evolution of the deformation textures, tensile tests were performed from 5% up to failure. During deformation, the {111}<110> component sharpens and the value of the texture function F(g) increases from 7.3, for the non-deformed sample, to 9.5, for deformed sample (20%). In the presence of this component in the non-deformed sheet, plastic flow is easier. Using EBSD, we could also show the heterogeneous structure that develops during deformation and induces heterogeneous mechanical behaviour which is not predictable using global characterization techniques.Diplôme : Magistère En ligne : ../theses/physique/AYA4344.pdf Permalink : index.php?lvl=notice_display&id=3573 Caractérisation par électron Back Scattering diffraction(EBSD) de l'évolution des textures de déformation en traction d'un acier doux [texte imprimé] / Abdelhak Ayad, Auteur ; N. Rouag, Directeur de thèse ; Univ. de Constantine, Éditeur scientifique . - 2005 . - 110 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Texture Acier Déformation plastique EBSD Plastic deformation Low-carbon steel البنية النسيجية التشوه اللذن الفولاذ Index. décimale : 530 Physique Résumé : The present study examines deformation textures in a low-carbon steel. Electron Back-Scattering Diffraction (EBSD) has been used in order to follow the evolution of the texture. EBSD is a local analysis technique performed in a Scanning Electron Microscope. This technique was developed as a result of the progress made in electronic imagery and image analysis. It is useful methode for microstructure progress and characterisation. In this study, the non-deformed material shows a {111} -fibre texture (known as γ-fibre), with one dominant orientation {111}<110>.
Generaly a material with this texture has good formability. Its deformation aptitude may thus be related to the evolution of this texture component. To follow the evolution of the deformation textures, tensile tests were performed from 5% up to failure. During deformation, the {111}<110> component sharpens and the value of the texture function F(g) increases from 7.3, for the non-deformed sample, to 9.5, for deformed sample (20%). In the presence of this component in the non-deformed sheet, plastic flow is easier. Using EBSD, we could also show the heterogeneous structure that develops during deformation and induces heterogeneous mechanical behaviour which is not predictable using global characterization techniques.Diplôme : Magistère En ligne : ../theses/physique/AYA4344.pdf Permalink : index.php?lvl=notice_display&id=3573 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité AYA/4344 AYA/4344 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude de l'évolution microstructurale au cours de la croissance des revetements de nitrures , analyse par MEB-EDX-EBSD Type de document : texte imprimé Auteurs : Fatima-Zohra Mammeri ; N. Rouag, Directeur de thèse ; Univ. de Constantine, Éditeur scientifique Année de publication : 2007 Importance : 102 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Texture Films minces MEB CrN et CrAIN Pulvérisation magnétron EDX EBSD Index. décimale : 530 Physique En ligne : ../theses/physique/MAM4834.pdf Permalink : index.php?lvl=notice_display&id=3488 Etude de l'évolution microstructurale au cours de la croissance des revetements de nitrures , analyse par MEB-EDX-EBSD [texte imprimé] / Fatima-Zohra Mammeri ; N. Rouag, Directeur de thèse ; Univ. de Constantine, Éditeur scientifique . - 2007 . - 102 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Texture Films minces MEB CrN et CrAIN Pulvérisation magnétron EDX EBSD Index. décimale : 530 Physique En ligne : ../theses/physique/MAM4834.pdf Permalink : index.php?lvl=notice_display&id=3488 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MAM/4834 MAM/4834 Thèse Bibliothèque principale Thèses Disponible 
Titre : Etude de l’influence de l’anisotropie sur la recristallisation et la croissance des grains. : Simulation et application aux aciers IF. Type de document : texte imprimé Auteurs : Abdelhak Ayad, Auteur ; Nadjet Rouag, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2013 Importance : 132 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Aciers IF DRX EBSD Monte Carlo croissance normale cinétique texture distribution de
tailles de grains désorientations recristallisation déformation IF steels XRD normal grain growth kinetics grain size
distribution misorientation recrystallization deformation
الفولادIF النمو العادي للحبيبات حركية البنيةالنسيجية توزيع حجم الحبيبات تباين الاتجاهات إعادةالبلورة الأولية تشوهDRXIndex. décimale : 530 Physique Résumé : The present study is a contribution to understanding and modeling the microstructural mechanisms that control the changes in the crystallographic texture during recrystallization and grain growth. Our aim is to determine the characteristics that allow the following of texture evolutions and identifying the fundamental mechanisms that govern this evolution, in order to model the normal grain growth stage, in IF steel. The comparison of grain growth simulation results with the experimental behavior requires initial data for the model development and final data for its validation. For this, a detailed experimental study was performed of primary recrystallization grain growth stages, starting from 75% rolled state. We characterized the crystallographic texture, global by XRD and local by EBSD, in parallel of following the recrystallized fractions, the grain sizes and misorientations distributions and the kinetics of recrystallization and grain growth. For the simulation of normal grain growth, a modified version of the Monte Carlo technique was implemented. An original concept, using a consideration of an adjustable effect of grain size, has been introduced. This concept is based on the role of certain subpopulations of grains in the control of the final texture. It allows not only better account for the pressure at the grain boundaries but also accelerates significantly large calculations. The introduction of such grain size parameter allows to
control the growth kinetics and generates the parabolic law (n = 2), predicted by theory. In addition, the self-similarity of the distribution of grain sizes is preserved and the distributions obtained are in agreement with the experimental observations. In all simulations, the intensity of the component {111} <110> increases and reaches a level that corresponds to the experimental reality. The intensity of component {111} <112> increases slightly in all calculations, which opposes to the experimental trend which provides a slight decrease of this component. It should be noted that the introduced grain size parameter has a very limited effect on the texture evolution in our model.Diplôme : Doctorat en sciences En ligne : ../theses/physique/AYA6373.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6339 Etude de l’influence de l’anisotropie sur la recristallisation et la croissance des grains. : Simulation et application aux aciers IF. [texte imprimé] / Abdelhak Ayad, Auteur ; Nadjet Rouag, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2013 . - 132 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Aciers IF DRX EBSD Monte Carlo croissance normale cinétique texture distribution de
tailles de grains désorientations recristallisation déformation IF steels XRD normal grain growth kinetics grain size
distribution misorientation recrystallization deformation
الفولادIF النمو العادي للحبيبات حركية البنيةالنسيجية توزيع حجم الحبيبات تباين الاتجاهات إعادةالبلورة الأولية تشوهDRXIndex. décimale : 530 Physique Résumé : The present study is a contribution to understanding and modeling the microstructural mechanisms that control the changes in the crystallographic texture during recrystallization and grain growth. Our aim is to determine the characteristics that allow the following of texture evolutions and identifying the fundamental mechanisms that govern this evolution, in order to model the normal grain growth stage, in IF steel. The comparison of grain growth simulation results with the experimental behavior requires initial data for the model development and final data for its validation. For this, a detailed experimental study was performed of primary recrystallization grain growth stages, starting from 75% rolled state. We characterized the crystallographic texture, global by XRD and local by EBSD, in parallel of following the recrystallized fractions, the grain sizes and misorientations distributions and the kinetics of recrystallization and grain growth. For the simulation of normal grain growth, a modified version of the Monte Carlo technique was implemented. An original concept, using a consideration of an adjustable effect of grain size, has been introduced. This concept is based on the role of certain subpopulations of grains in the control of the final texture. It allows not only better account for the pressure at the grain boundaries but also accelerates significantly large calculations. The introduction of such grain size parameter allows to
control the growth kinetics and generates the parabolic law (n = 2), predicted by theory. In addition, the self-similarity of the distribution of grain sizes is preserved and the distributions obtained are in agreement with the experimental observations. In all simulations, the intensity of the component {111} <110> increases and reaches a level that corresponds to the experimental reality. The intensity of component {111} <112> increases slightly in all calculations, which opposes to the experimental trend which provides a slight decrease of this component. It should be noted that the introduced grain size parameter has a very limited effect on the texture evolution in our model.Diplôme : Doctorat en sciences En ligne : ../theses/physique/AYA6373.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6339 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité AYA/6373 AYA/6373 Thèse Bibliothèque principale Thèses Disponible Documents numériques
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