Описание: The mineral resources of the industrialized countries, especially the member nations of the North Atlantic Treaty Organiza- tion, are being depleted at such a rate that more and more of these count ries are beginning to depend on ore imported from other coun- tries. To sustain the economic and strategie well-being of these member countries, it becomes imperative that a program of developing and exploiting other non-conventional mineral resources and a con- servation program where metal values from waste dumps and scrap metals and alloys are recycled must be initiated and implemented. In order to meet this challenge, new processes and technology must be available for consideration in the design and operation of the new plants. One of the possible routes of extracting the metals from their ores, especially for multimetal complex ores and very low grade ores, is by hydrometallurgical processing. The hydrometallurgical route of metal recovery where dissolution (leaching), separation and concentration (ion exchange, solvent extraction, and membrane separation) and reduction to metal (cementation, precipitation by gaseous reduction, and electrolysis) is carried out at near ambient temperature is becoming more competi- tive with the conventional high temperature processes used in the smelting of metals from high grade and beneficiated ores.
Автор: Hosford Название: Fundamentals of Engineering Plasticity ISBN: 1107037557 ISBN-13(EAN): 9781107037557 Издательство: Cambridge Academ Рейтинг: Цена: 4485 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: William Hosford's book is ideal for those involved in designing sheet metal forming processes. Knowledge of plasticity is essential for the computer simulation of metal forming processes and understanding the advances in plasticity theory is key to formulating sound analyses. The author makes the subject simple by avoiding notations used by specialists in mechanics. R. Hill's authoritative book, Mathematical Theory of Plasticity (1950), presented a comprehensive treatment of continuum plasticity theory up to that time; much of the treatment in this book covers the same ground, but focuses on more practical topics. Hosford has included recent developments in continuum theory, including a newer treatment of anisotropy that has resulted from calculations of yielding based on crystallography, analysis of the role of defects, and forming limit diagrams. A much greater emphasis is placed on deformation mechanisms and the book also includes chapters on slip and dislocation theory and twinning.
Автор: J Paulo Davim Название: Machining and Machine-tools, ISBN: 0857091549 ISBN-13(EAN): 9780857091543 Издательство: Elsevier Science Рейтинг: Цена: 17243 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This book is the third in the Woodhead Publishing Reviews: Mechanical Engineering Series, and includes high quality articles (full research articles, review articles and case studies) with a special emphasis on research and development in machining and machine-tools. Machining and machine tools is an important subject with application in several industries. Parts manufactured by other processes often require further operations before the product is ready for application. Traditional machining is the broad term used to describe removal of material from a work piece, and covers chip formation operations including: turning, milling, drilling and grinding. Recently the industrial utilization of non-traditional machining processes such as EDM (electrical discharge machining), LBM (laser-beam machining), AWJM (abrasive water jet machining) and USM (ultrasonic machining) has increased. The performance characteristics of machine tools and the significant development of existing and new processes, and machines, are considered. Nowadays, in Europe, USA, Japan and countries with emerging economies machine tools is a sector with great technological evolution.
Название: Machining ISBN: 1848002122 ISBN-13(EAN): 9781848002128 Издательство: Springer Рейтинг: Цена: 16719 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Divided into two parts, the first part of this book explains the fundamentals of machining, with special emphasis on the mechanics of machining, tools, and work-piece integrity. The second part is dedicated to recent advances in machining.
Описание: Despite decades of extensive research in this field, no solution to the problem of optimal part surface generation has been found. "Kinematic Geometry Surface
Machining" fills the gap between the capabilities of modern multi-axis numerical controlled machines and the demands of the market. This book presents the latest research in the field
of optimal surface generation.
It provides an overview of modern CAD/CAM systems for high precision sculptured part surfaces. Including real-world examples and
end-of-chapter references, the text also explains in detail how to develop the most cost-effective methods of machining for high quality sculptured surfaces on a multi-axis numerical
Описание: Advanced Machining Processes of Metallic Materials updates our knowledge on the metal cutting processes in relation to theory and industrial practice. In particular, many topics reflect recent developments, e.g. modern tool materials, computational machining, computer simulation of various process phenomena, chip control, monitoring of the cutting state, progressive and hybrid machining operations, and generation and modelling of surface integrity. This book addresses the present state and future development of machining technologies. It provides a comprehensive description of metal cutting theory, experimental and modelling techniques along with basic machining processes and their effective use in a wide range of manufacturing applications. Topics covered include fundamental physical phenomena and methods for their evaluation, available technology of machining processes for specific classes of materials and surface integrity. The book also provides strategies for optimalization techniques and assessment of machinability. Moreover, it describes topics not currently covered in other sources, such as high performance and multitasking (complete) machining with a high potential for increasing productivity, and virtual and e-machining. The research covered here has contributed to a more generalized vision of machining technology, including not only traditional manufacturing tasks but also new potential (emerging) applications such as micro- and nanotechnology.
Автор: Dixit, Prakash M. Dixit, Uday S. Название: Modeling of metal forming and machining processes ISBN: 1848001886 ISBN-13(EAN): 9781848001886 Издательство: Springer Рейтинг: Цена: 24415 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The physics of metal forming and metal removing is normally expressed using non-linear partial differential equations which can be solved using the finite element method (FEM). Using FEM, fuzzy set theory and neural networks as modelling tools, this book gives an explanation of FEM and its application to the modelling of manufacturing processes.
Автор: Olling Название: Machining Impossible Shapes ISBN: 0412846802 ISBN-13(EAN): 9780412846809 Издательство: Springer Рейтинг: Цена: 22886 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Advanced Machining Processes of Metallic Materials: Theory, Modelling and Applications, Second Edition, explores the metal cutting processes with regard to theory and industrial practice. Structured into three parts, the first section provides information on the fundamentals of machining, while the second and third parts include an overview of the effects of the theoretical and experimental considerations in high-level machining technology and a summary of production outputs related to part quality. . In particular, topics discussed include: modern tool materials, mechanical, thermal and tribological aspects of machining,computer simulation of various process phenomena, chip control, monitoring of the cutting state, progressive and hybrid machining operations, as well as practical ways for improving machinability and generation and modeling of surface integrity. . This new edition addresses the present state and future development of machining technologies, and includes expanded coverage on machining operations, such as turning, milling, drilling, and broaching, as well as a new chapter on sustainable machining processes. In addition, the book provides a comprehensive description of metal cutting theory and experimental and modeling techniques, along with basic machining processes and their effective use in a wide range of manufacturing applications. The research covered here has contributed to a more generalized vision of machining technology, including not only traditional manufacturing tasks, but also potential (emerging) new applications, such as micro and nanotechnology.
Описание: This Book Provides A Comprehensive Introduction To The Unique Theory Developed Over Years Of Research On Materials And Process Modelling And Its Application In Metal Forming Technologies. It Starts With The Introduction Of Fundamental Theories On The Mechanics Of Materials, Computational Mechanics And The Formulation Of Unified Constitutive Equations. Particular Attention Is Paid To Elastic–Plastic Formulations For Cold Metal Forming And Unified Elastic–Viscoplastic Constitutive Equations For Warm/Hot Metals Processing. Damage In Metal Forming And Numerical Techniques To Solve And Determine The Unified Constitutive Equations Are Also Detailed. Examples Are Given For The Application Of The Unified Theories To Solve Practical Problems Encountered In Metal Forming Processes. This Is Particularly Useful To Predict Microstructure Evolution In Warm/Hot Metal Forming Processes. Crystal Plasticity Theories And Modelling Techniques With Their Applications In Micro-Forming Are Also Introduced In The Book. The Book Is Self-Contained And Unified In Presentation. The Explanations Are Highlighted To Capture The Interest Of Curious Readers And Complete Enough To Provide The Necessary Background Material To Further Explore/Develop New Theories And Applications.
Описание: Creep and fatigue are the most prevalent causes of rupture in superalloys, which are important materials for industrial usage, e.g. in engines and turbine blades in aerospace or in energy producing industries. As temperature increases, atom mobility becomes appreciable, affecting a number of metal and alloy properties. It is thus vital to find new characterization methods that allow an understanding of the fundamental physics of creep in these materials as well as in pure metals. Here, the author shows how new in situ X-ray investigations and transmission electron microscope studies lead to novel explanations of high-temperature deformation and creep in pure metals, solid solutions and superalloys. This unique approach is the first to find unequivocal and quantitative expressions for the macroscopic deformation rate by means of three groups of parameters: substructural characteristics, physical material constants and external conditions. Creep strength of the studied up-to-date single crystal superalloys is greatly increased over conventional polycrystalline superalloys. From the contents: *Macroscopic characteristics otrain at high temperatures *Experimental equipment and technique of in situ X-ray investigations *Experimental data and structural parameters in deformed metals *Subboundaries as dislocation sources and obstacles *The physical mechanism of creep and the quantitative structural model *Simulation of the parameters evolution *System of differential equations *High-temperature deformation of industrial superalloys *Single crystals of superalloys *Effect of composition, orientation and temperature on properties *Creep of some refractory metals For materials scientists, solid state physicists, solid state chemists, researchers and practitioners from industry sectors including metallurgical, mechanical, chemical and structural engineers.
Автор: Gary S. Was Название: Fundamentals Of Radiation Materials Science ISBN: 1493934368 ISBN-13(EAN): 9781493934362 Издательство: Springer Рейтинг: Цена: 9926 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The revised second edition of this established text offers readers a significantly expanded introduction to the effects of radiation on metals and alloys. It describes the various processes that occur when energetic particles strike a solid, inducing changes to the physical and mechanical properties of the material. Specifically it covers particle interaction with the metals and alloys used in nuclear reactor cores and hence subject to intense radiation fields. It describes the basics of particle-atom interaction for a range of particle types, the amount and spatial extent of the resulting radiation damage, the physical effects of irradiation and the changes in mechanical behavior of irradiated metals and alloys.Updated throughout, some major enhancements for the new edition include improved treatment of low- and intermediate-energy elastic collisions and stopping power, expanded sections on molecular dynamics and kinetic Monte Carlo methodologies describing collision cascade evolution, new treatment of the multi-frequency model of diffusion, numerous examples of RIS in austenitic and ferritic-martensitic alloys, expanded treatment of in-cascade defect clustering, cluster evolution, and cluster mobility, new discussion of void behavior near grain boundaries, a new section on ion beam assisted deposition, and reorganization of hardening, creep and fracture of irradiated materials (Chaps 12-14) to provide a smoother and more integrated transition between the topics.The book also contains two new chapters. Chapter 15 focuses on the fundamentals of corrosion and stress corrosion cracking, covering forms of corrosion, corrosion thermodynamics, corrosion kinetics, polarization theory, passivity, crevice corrosion, and stress corrosion cracking. Chapter 16 extends this treatment and considers the effects of irradiation on corrosion and environmentally assisted corrosion, including the effects of irradiation on water chemistry and the mechanisms of irradiation-induced stress corrosion cracking. The book maintains the previous style, concepts are developed systematically and quantitatively, supported by worked examples, references for further reading and end-of-chapter problem sets. Aimed primarily at students of materials sciences and nuclear engineering, the book will also provide a valuable resource for academic and industrial research professionals.Reviews of the first edition:'…nomenclature, problems and separate bibliography at the end of each chapter allow to the reader to reach a straightforward understanding of the subject, part by part. … this book is very pleasant to read, well documented and can be seen as a very good introduction to the effects of irradiation on matter, or as a good references compilation for experimented readers.' - Pauly Nicolas, Physicalia Magazine, Vol. 30 (1), 2008“The text provides enough fundamental material to explain the science and theory behind radiation effects in solids, but is also written at a high enough level to be useful for professional scientists. Its organization suits a graduate level materials or nuclear science course… the text was written by a noted expert and active researcher in the field of radiation effects in metals, the selection and organization of the material is excellent… may well become a necessary reference for graduate students and researchers in radiation materials science.” - L.M. Dougherty, 07/11/2008, JOM, the Member Journal of The Minerals, Metals and Materials Society.
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