Contribution à l'étude de la pliabilité des alliages Zn-Cu-Ti à basse température PDF Download
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Author: Yacouba Galledou
Publisher:
ISBN:
Category :
Languages : fr
Pages : 238
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Book Description
L'alliage zinc-cuivre-titane, utilisé dans l'industrie du bâtiment pour la couverture possède une très bonne aptitude au pliage au-dela de 7° C. Au-dessous de cette température, on observe généralement une fragilisation du métal pendant son utilisation. Notre travail a consisté à mettre en évidence les paramètres structuraux qui régissent l'aptitude au pliage de ces alliages. Ceci en vue d'améliorer leur pliabilité à des températures aussi basses que possible. Les résultats obtenus montrent que la transition ductile fragile des alliages Zn-Cu-Ti étudiés est influencée à la fois par l'orientation (odf) et la désorientation (modf) des grains. Il ressort, également de cette étude, que les axes C inclinés d'environ 20 sont favorables au pliage. l'obtention de la texture optimisee pour le pliage, necessite non seulement un compromis judicieux entre le laminage à froid et la recristallisation, mais aussi la recherche d'éléments d'addition permettant de diminuer la taille de grain.
Author: Yacouba Galledou
Publisher:
ISBN:
Category :
Languages : fr
Pages : 238
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Book Description
L'alliage zinc-cuivre-titane, utilisé dans l'industrie du bâtiment pour la couverture possède une très bonne aptitude au pliage au-dela de 7° C. Au-dessous de cette température, on observe généralement une fragilisation du métal pendant son utilisation. Notre travail a consisté à mettre en évidence les paramètres structuraux qui régissent l'aptitude au pliage de ces alliages. Ceci en vue d'améliorer leur pliabilité à des températures aussi basses que possible. Les résultats obtenus montrent que la transition ductile fragile des alliages Zn-Cu-Ti étudiés est influencée à la fois par l'orientation (odf) et la désorientation (modf) des grains. Il ressort, également de cette étude, que les axes C inclinés d'environ 20 sont favorables au pliage. l'obtention de la texture optimisee pour le pliage, necessite non seulement un compromis judicieux entre le laminage à froid et la recristallisation, mais aussi la recherche d'éléments d'addition permettant de diminuer la taille de grain.
Author: Robert W. Cahn
Publisher: Wiley-VCH
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 864
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Book Description
This self-contained handbook provides a unique and comprehensive treatment of the history, development, processing and applications of non-ferrous alloys. Acknowledged international experts from industry and academia have contributed to the work, making it indispensable for materials scientists and engineers. Contents: Banerjee/Suri: Tin. Prengaman: Lead. Walmag/Coutsouradis: Zinc. Neite/Higashi/Kubota/Hehmann: Copper- based Alloys. Heubner: Nickel-based Alloys. Froes/Weidinger/Yau: Titanium-, Zirconium, and Hafnium-Based Alloys. Schlamp: Noble Metals and Their Alloys. Pink/Eck: Refractory Metals and Their Alloys. Sauthoff: Intermetallics. Singheiser: Oxidation and Hot Gas Corrosion.
Author: Société d'encouragement pour l'industrie nationale. Commission des alliages
Publisher:
ISBN:
Category : Alloys
Languages : fr
Pages : 586
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Book Description
Author: Ivan Beaujean
Publisher:
ISBN:
Category :
Languages : fr
Pages : 292
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Book Description
Nous avons travaillé sur différentes tôles en alliage zinc-cuivre-titane (matrice ZnCu avec TiZn15 en seconde phase). Nous avons étudié notamment la texture, la microstructure et les propriétés mécaniques de ces tôles, particulièrement leur pliabilité. En effet, il est apparu que la pliabilité de ces tôles est déterminée dans une large mesure par leurs texture et microstructure. Lorsque les tôles présentent de gros grains, (15 m) la texture est relativement peu marquée et de nombreux joints de grains montrent une grande désorientation ; il peut en résulter une fissure intergranulaire. Lorsque les tôles présentent des grains plus fins (8 m), la texture est plus marquée, les joints de grains montrent une faible désorientation et la pliabilité est plutôt satisfaisante à faible température. En réduisant davantage la taille de grain, une nouvelle composante de texture apparaît dont les axes c présentent un angle important d'inclinaison par rapport à la normale de la tôle. Dans la mesure ou une fissure intergranulaire apparaît facilement dans ces grains (clivage sur le plan 00.2), la pliabilité globale de la tôle est réduite
Author: Ali Argon
Publisher: Oxford University Press on Demand
ISBN: 0198516002
Category : Science
Languages : en
Pages : 425
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Book Description
Technologically important metals and alloys have been strengthened throughout history by empirical means. The scientific bases of the central mechanisms of such forms of strengthening, developed over the past several decades are presented here through mechanistic models and associated experimental results.
Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659
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Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author: Agnes Buka
Publisher: World Scientific
ISBN: 1848167997
Category : Science
Languages : en
Pages : 299
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Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: Sir Robin Nicholson
Publisher: Halsted Press
ISBN:
Category : Science
Languages : en
Pages : 648
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Book Description
Author: Fred T. Mackenzie
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 598
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Book Description
This book offers a general, interdisciplinary discussion of global environmental change oriented toward the non-specialist in science.The unifying theme of the book is consideration of aspects of both natural and human-induced global environmental change. The two part organization according to this distinction allows for easy reading on specific topics.This book is useful for anyone interested in learning more about Earth's systems.
Author: Lew Christopher
Publisher: Royal Society of Chemistry
ISBN: 1849735069
Category : Technology & Engineering
Languages : en
Pages : 323
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Book Description
This reference book describes how bioprocessing and biotechnology could enhance the value extracted from wood-based lignocellulosic fiber by employing both biochemical and thermochemical conversion processes. It documents recent accomplishments and suggests future prospects for research and development of integrated forest biorefineries (IFBR) as the path forward for the pulp, paper and other fiber-processing industries. This is the only book to cover this area of high economic, social, and environmental importance. It is aimed at industrialists and academics from diverse science and engineering backgrounds including chemical and biotechnology companies, governmental and professional bodies, and scholarly societies. The Editor and contributors are internationally recognized scientists and many are leaders in their respective fields. The book starts with an introductory overview of the current state of biorefining and a justification for future developments. The next four chapters deal with social, economic and environmental issues related to regulations, biomass production and supply, process modelling, and life cycle analysis. Subsequent chapters focus on the extraction of biochemicals from biomass and their potential utilization to add value to the IFBR prior to pulping. The book then presents, compares and evaluates two types of forest biorefineries based on kraft and organosolv pulping. Finally, the book assess the potential of waste biomass and streams, such paper mill sludge and black liquor, to serve as feedstock for biofuel production and value-added biomaterials through both the biochemical and thermochemical routes of biomass bioprocessing. The economics of the described IFBR processes and products, and their environmental impact, is a major focus in most of the chapters. Practical examples are presented where relevant and applicable.
