Caractérisation et identification de propriétés de matériaux métalliques à gradients de microstructure PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Caractérisation et identification de propriétés de matériaux métalliques à gradients de microstructure PDF full book. Access full book title Caractérisation et identification de propriétés de matériaux métalliques à gradients de microstructure by Pierre Baudoin. Download full books in PDF and EPUB format.
Author: Pierre Baudoin
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
Get Book Here
Book Description
L'objectif de ces travaux de thèse est de proposer une démarche de caractérisation et de simulation de matériaux métalliques à gradients de microstructure. Ces résultats doivent permettre de modéliser l'impact du procédé de forgeage sur la tenue en fatigue à grand nombre de cycles d'essieux ferroviaires, produits dans le cadre du projet Innovaxle par la société Valdunes. Des essais de caractérisation réalisés sur un essieu forgé mettent en évidence un gradient de taille de grain entre le cœur et la surface de la pièce. Ce gradient est reproduit à une échelle plus fine sur des éprouvettes recristallisées en fer ARMCO, dont la caractérisation révèle un comportement élasto-plastique fortement hétérogène. Ce comportement est caractérisé à l'aide de la méthode F.E.M.U. (Finite Element Model Updating), qui appuie une hypothèse de modélisation basée sur l'application de la loi Hall-Petch à l'échelle mésoscopique. Cette modélisation sert de base à des simulations en fatigue décrivant la réponse à des sollicitations non-uniformes d'agrégats polycristallins à gradient de microstructure. L'intérêt de microstructures conçues en prévision de chargements spécifiques est mise en avant par ces simulations. Les calculs éléments finis présentés dans ces travaux sont réalisés avec le logiciel Code Aster, et le logiciel libre YADICS est utilisé pour la corrélation d'images numériques.
Author: Pierre Baudoin
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
Get Book Here
Book Description
L'objectif de ces travaux de thèse est de proposer une démarche de caractérisation et de simulation de matériaux métalliques à gradients de microstructure. Ces résultats doivent permettre de modéliser l'impact du procédé de forgeage sur la tenue en fatigue à grand nombre de cycles d'essieux ferroviaires, produits dans le cadre du projet Innovaxle par la société Valdunes. Des essais de caractérisation réalisés sur un essieu forgé mettent en évidence un gradient de taille de grain entre le cœur et la surface de la pièce. Ce gradient est reproduit à une échelle plus fine sur des éprouvettes recristallisées en fer ARMCO, dont la caractérisation révèle un comportement élasto-plastique fortement hétérogène. Ce comportement est caractérisé à l'aide de la méthode F.E.M.U. (Finite Element Model Updating), qui appuie une hypothèse de modélisation basée sur l'application de la loi Hall-Petch à l'échelle mésoscopique. Cette modélisation sert de base à des simulations en fatigue décrivant la réponse à des sollicitations non-uniformes d'agrégats polycristallins à gradient de microstructure. L'intérêt de microstructures conçues en prévision de chargements spécifiques est mise en avant par ces simulations. Les calculs éléments finis présentés dans ces travaux sont réalisés avec le logiciel Code Aster, et le logiciel libre YADICS est utilisé pour la corrélation d'images numériques.
Author:
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 358
Get Book Here
Book Description
Author: Nicolas Boyard
Publisher: John Wiley & Sons
ISBN: 1848217617
Category : Science
Languages : en
Pages : 464
Get Book Here
Book Description
This book addresses general information, good practices and examples about thermo-physical properties, thermo-kinetic and thermo-mechanical couplings, instrumentation in thermal science, thermal optimization and infrared radiation.
Author: Madeleine Durand-Charre
Publisher: Routledge
ISBN: 1351409824
Category : Technology & Engineering
Languages : en
Pages : 139
Get Book Here
Book Description
Presents all the main aspects of the microstructure of nickel-base superalloys, and includes micrographs chosen from among a large range of commercial and academic alloys, from the as-cast product to in-situ components, worn from in-service use. Including more than 100 illustrations, the text explains all the transformation mechanisms involved in the origination (creation) of microstructures during solidification or heat treatments (crystallization paths, segregation, crystal orientation, precipitation, TCP, coarsening and rafting, etc.). It includes up-to-date information and data such as phase diagrams, crystallographic structures, and relationships with functional properties. Nearly 300 references provide a key to further investigation.
Author: A. Vautrin
Publisher: Springer Science & Business Media
ISBN: 9401136580
Category : Technology & Engineering
Languages : en
Pages : 458
Get Book Here
Book Description
Author: P.R.N. Childs
Publisher: Butterworth-Heinemann
ISBN: 0080524028
Category : Technology & Engineering
Languages : en
Pages : 420
Get Book Here
Book Description
Metal machining is the most widespread metal-shaping process in the mechanical manufacturing industry. World-wide investment in metal machining tools increases year on year - and the wealth of nations can be judged by it. This text - the most up-to-date in the field - provides in-depth discussion of the theory and application of metal machining at an advanced level. It begins with an overview of the development of metal machining and its role in the current industrial environment and continues with a discussion of the theory and practice of machining. The underlying mechanics are analysed in detail and there are extensive chapters examining applications through a discussion of simulation and process control. "Metal Machining: Theory and Applications" is essential reading for senior undergraduates and postgraduates specialising in cutting technology. It is also an invaluable reference tool for professional engineers. Professors Childs, Maekawa, Obikawa and Yamane are four of the leading authorities on metal machining and have worked together for many years.Of interest to all mechanical, manufacturing and materials engineersTheoretical and practical problems addressed
Author: Télesphore Sime-Ngando
Publisher: Springer
ISBN: 3319399616
Category : Science
Languages : en
Pages : 422
Get Book Here
Book Description
This book represents the first multidisciplinary scientific work on a deep volcanic maar lake in comparison with other similar temperate lakes. The syntheses of the main characteristics of Lake Pavin are, for the first time, set in a firmer footing comparative approach, encompassing regional, national, European and international aquatic science contexts. It is a unique lake because of its permanently anoxic monimolimnion, and furthermore, because of its small surface area, its substantially low human influence, and by the fact that it does not have a river inflow. The book reflects the scientific research done on the general limnology, history, origin, volcanology and geological environment as well as on the geochemistry and biogeochemical cycles. Other chapters focus on the biology and microbial ecology whereas the sedimentology and paleolimnology are also given attention. This volume will be of special interest to researchers and advanced students, primarily in the fields of limnology, biogeochemistry, and aquatic ecology.
Author: Mark Alexander
Publisher: Springer Science & Business Media
ISBN: 9400754132
Category : Technology & Engineering
Languages : en
Pages : 471
Get Book Here
Book Description
Concrete and cement-based materials must operate in increasingly aggressive aqueous environments, which may be either natural or industrial. These materials may suffer degradation in which ion addition and/or ion exchange reactions occur, leading to a breakdown of the matrix microstructure and consequent weakening. Sometimes this degradation can be extremely rapid and serious such as in acidic environments, while in other cases degradation occurs over long periods. Consequences of material failure are usually severe – adversely affecting the health and well-being of human communities and disturbing ecological balances. There are also large direct costs of maintaining and replacing deteriorated infrastructure and indirect costs from loss of production during maintenance work, which place a great burden on society. The focus of this book is on addressing issues concerning performance of cement-based materials in aggressive aqueous environments , by way of this State-of-the-Art Report. The book represents the work of many well-known and respected authors who contributed chapters or parts of chapters. Four main themes were addressed: I. Nature and kinetics of degradation and deterioration mechanisms of cement-based materials in aggressive aqueous environments, II. Modelling of deterioration in such environments, III. Test methods to assess performance of cement-based materials in such environments, and which can be used to characterise and rate relative performance and inform long term predictions, IV. Engineering implications and consequences of deterioration in aggressive aqueous environments, and engineering approaches to the problem.
Author: Giacomo Cao
Publisher: Elsevier
ISBN: 0128177446
Category : Technology & Engineering
Languages : en
Pages : 334
Get Book Here
Book Description
Spark Plasma Sintering: Current Status, New Developments and Challenges looks at the progress made in the field of SPS. It includes a review of the scientific mechanisms, materials synthesis and industry applications for this processing technique. Chapters are written by leading experts in the field, encompassing topics surrounding the densification mechanism and microstructure evolution, the classification of high-performance materials, a review of numerical simulation, discussions of new technology advances, such as HP-SPS, flash sintering and related challenges. This book will be useful for researchers, engineers and students within the materials science and engineering fields.
Author: Pasquale Cavaliere
Publisher: Springer
ISBN: 3319671839
Category : Technology & Engineering
Languages : en
Pages : 566
Get Book Here
Book Description
This book combines the contributions of experts in the field to describe the behavior of various materials, micromechanisms involved during processing, and the optimization of cold-spray technology. It spans production, characterization, and applications including wear resistance, fatigue, life improvement, thermal barriers, crack repair, and biological applications. Cold spray is an innovative coating technology based on the kinetic energy gained by particles sprayed at very high pressures. While the technique was developed in the 1990s, industrial and scientific interest in this technology has grown vastly in the last ten years. Recently, many interesting applications have been associated with cold-sprayed coatings, including wear resistance, fatigue life improvement, thermal barriers, biological applications, and crack repair. However, many fundamental aspects require clarification and description.
