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Books > Professional & Technical > Industrial chemistry & manufacturing technologies > Metals technology / metallurgy
Tin (Sn) whiskers are electrically conductive, single crystal eruptions that grow from Sn film surfaces. Their high aspect ratio presents reliability problems for the electronics industry due to bridging and metal arcing, leading to malfunctions and catastrophic failures in many electronic systems (including satellite and defense sectors). Due to legislation in the EU, Japan, and the U.S., mandating a gradual shift from lead (Pb)-based to lead-free solders and board finishes, there has been a reemergence of Sn whiskers. Continuing reports of Sn whisker induced failures coupled with the lack of an industry-accepted understanding of whisker growth and/or test methods to identify whisker prone products has made pure/high Sn substitutes a risky proposition in high reliability systems. This thesis is designed to clarify and control the fundamental mechanisms that govern whisker formation. The research focuses on reproducible "laboratory" created whiskers under a variety of rigorously controlled environmental factors such as film thickness, film stress, substrate material, gas environment, and humidity exposure, which are known to play a significant role in whisker production. The ultimate question of how to impede and/or prevent whisker growth is also addressed and shows that whisker prevention is possible via hard metal capping films, which are impenetrable by whiskers.
This book equips a reader with knowledge necessary for critical
analysis of innovations in electric arc furnaces and helps to
select the most effective ones and for their successful
implementation. The book also covers general issues related to
history of development, current state and prospects of steelmaking
in Electric Arc Furnaces. Therefore, it can be useful for everybody
who studies metallurgy, including students of colleges and
universities.
Creep-resistant steels are widely used in the petroleum, chemical
and power generation industries. Creep-resistant steels must be
reliable over very long periods of time at high temperatures and in
severe environments. Understanding and improving long-term creep
strength is essential for safe operation of plant and equipment.
This book provides an authoritative summary of key research in this
important area.
Hydroforming uses a pressurised fluid to form component shapes. The
process allows the manufacture of lighter, more complex shapes with
increased strength at lower cost compared to more traditional
techniques such as stamping, forging, casting or welding. As a
result hydroformed components are increasingly being used in the
aerospace, automotive and other industries. This authoritative book
reviews the principles, applications and optimisation of this
important process.
This book introduces readers to the fundamental properties and practical applications of shape memory alloys (SMAs) from the perspective of seismic engineering. It objectively discusses the superiority of this novel class of materials, which could potentially overcome the limitations of conventional seismic control technologies. The results, vividly presented in the form of tables and figures, are demonstrated with rigorous experimental verifications, supplemented by comprehensive numerical and analytical investigations. The book allows readers to gain an in-depth understanding of the working mechanisms of various SMA-based structural devices and members, including beam-to-column connections, dampers, and braces, while also providing them with a broader vision of next-generation, performance-based seismic design for novel adaptive structural systems. Helping to bridge the gap between material science and structural engineering, it also sheds light on the potential of commercializing SMA products in the construction industry. The cutting-edge research highlighted here provides technical incentives for design professionals, contractors, and building officials to use high-performance and smart materials in structural design, helping them stay at the forefront of construction technology.
Sintering is fast becoming one of the most important industrial
techniques for optimising the capabilities of different materials.
The book includes a synthesis of research findings on the structure
and evolution of the Central Indian Ocean Basin and its
ferromanganese deposits, in particular, on the exploration campaign
since 1980s. A comprehensive mixture of recent studies along with
classical theories starting from the 1960s is the hallmark of the
book. Recent concepts and hypotheses, and also critical
appreciation of the state-of-the-art knowledge on nodule formation
and resource management are incorporated.
This book explores the interconnections and differentiations between artisanal workshops and alchemical laboratories and between the arts and alchemy from Antiquity to the eighteenth century. In particular, it scrutinizes epistemic exchanges between producers of the arts and alchemists. In the fifteenth and sixteenth centuries the term "laboratorium" uniquely referred to workplaces in which chemical operations were performed: smelting, combustion, distillation, dissolution and precipitation. Artisanal workshops equipped with furnaces and fire in which chemical operations were performed were also known as laboratories. Transmutational alchemy (the transmutation of all base metals into more noble ones, especially gold) was only one aspect of alchemy in the early modern period. The practice of alchemy was also about the chemical production of things--medicines, porcelain, dyes and other products as well as precious metals and about the knowledge of how to produce them. This book uses examples such as the "Uffizi" to discuss how Renaissance courts established spaces where artisanal workshops and laboratories were brought together, thus facilitating the circulation of materials, people and knowledge between the worlds of craft (today s decorative arts) and alchemy. Artisans became involved in alchemical pursuits beyond a shared material culture and some crafts relied on chemical expertise offered by scholars trained as alchemists. Above all, texts and books, products and symbols of scholarly culture played an increasingly important role in artisanal workshops. In these workplaces a sort of hybrid figure was at work. With one foot in artisanal and the other in scholarly culture this hybrid practitioner is impossible to categorize in the mutually exclusive categories of scholar and craftsman. By the seventeenth century the expertise of some glassmakers, silver and goldsmiths and producers of porcelain was just as based in the worlds of alchemical and bookish learning as it was grounded in hands-on work in the laboratory. This book suggests that this shift in workshop culture facilitated the epistemic exchanges between alchemists and producers of the decorative arts."
This book comprises chapters on research work done around the globe in the area of artificial intelligence (AI) applications in sheet metal forming. The first chapter offers an introduction to various AI techniques and sheet metal forming, while subsequent chapters describe traditional procedures/methods used in various sheet metal forming processes, and focus on the automation of those processes by means of AI techniques, such as KBS, ANN, GA, CBR, etc. Feature recognition and the manufacturability assessment of sheet metal parts, process planning, strip-layout design, selecting the type and size of die components, die modeling, and predicting die life are some of the most important aspects of sheet metal work. Traditionally, these activities are highly experience-based, tedious and time consuming. In response, researchers in several countries have applied various AI techniques to automate these activities, which are covered in this book. This book will be useful for engineers working in sheet metal industries, and will serve to provide future direction to young researchers and students working in the area.
This book introduces readers to titanium matrix composites (TMCs) with novel network microstructures. The bottleneck problem of extreme brittleness and low strengthening effect surrounding TMCs fabricated by means of powder metallurgy has recently been solved by designing network microstructures, which yield both high strength and superior ductility. As such, network structured TMCs will increasingly offer materials characterized by low weight, high strength, high temperature resistance and superior deformability. The book systematically addresses the design, fabrication, microstructure, properties, modification, and toughening mechanisms of these composites, which will help us find innovative solutions to a range of current and future engineering problems.
Solder joints are ubiquitous in electronic consumer products. The European Union has a directive to ban the use of Pb-based solders in these products on July 1st, 2006. There is an urgent need for an increase in the research and development of Pb-free solders in electronic manufacturing. For example, spontaneous Sn whisker growth and electromigration induced failure in solder joints are serious issues. These reliability issues are quite complicated due to the combined effect of electrical, mechanical, chemical, and thermal forces on solder joints. To improve solder joint reliability, the science of solder joint behavior under various driving forces must be understood. In this book, the advanced materials reliability issues related to copper-tin reaction and electromigration in solder joints are emphasized and methods to prevent these reliablity problems are discussed.
Magnesium, with a density of 1.74 g/cm, is the lightest structural metal, and magnesium and its alloys are increasingly the material of choice for weight-critical applications such as in land-based transport systems. Magnesium Technology substantially updates and complements existing reference sources on this key material. It assembles international contributions from seven countries covering the wide range of research programs into new alloys with the requisite property profiles, i.e., the current state of both research and technological application of magnesium. In particular, the international team of authors cover key topics, such as: casting and wrought alloys; fabrication methods; corrosion and protection; engineering requirements and strategies, examples from the automobile, aerospace, and consumer-goods industries, and recycling. This authoritative reference and overview addresses materials researchers as well as design engineers.
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). However, when the process parameters are uncertain and/or the physics of the process is not well understood, soft computing techniques can be used with FEM or alone to model the process. Using FEM, fuzzy set theory and neural networks as modeling tools; Modeling of Metal Forming and Machining Processes provides a complete treatment of metal forming and machining, and includes: a [ an explanation of FEM and its application to the modeling of manufacturing processes; a [ a discussion of the numerical difficulties of FEM; a [ chapters on the application of soft computing techniques in this modeling process. The algorithms and solved examples included make Modeling of Metal Forming and Machining Processes of value to postgraduates, senior undergraduates, lecturers and researchers in these fields. R&D engineers and consultants for the manufacturing industry will also find it of use.
This book helps designers and manufacturers to select and develop the most suitable and competitive steel structures, which are safe, fit for production and economic. An optimum design system is used to find the best characteristics of structural models, which guarantee the fulfilment of design and fabrication requirements and minimize the cost function. Realistic numerical models are used as main components of industrial steel structures. Chapter 1 containts some experiences with the optimum design of steel structures Chapter 2 treats some newer mathematical optimization methods. Chapter 3 gives formulae for fabrication times and costs. Chapters 4 deals with beams and columns. Summarizes the Eurocode rules for design. Chapter 5 deals with the design of tubular trusses. Chapter 6 gives the design of frame structures and fire-resistant design rules for a frame. In Chapters 7 some minimum cost design problems of stiffened and cellular plates and shells are worked out for cases of different stiffenings and loads. Chapter 8 gives a cost comparison of cylindrical and conical shells. The book contains a large collection of literatures and a subject list and a name index.
The application of microbiological methods to the extraction of metals from minerals has definitely gained a prominent role and is supported by the several bioleaching and biooxidation processes operating in different sites over the world. In recent years, new techniques and new results about proteomic and bioinformatics offer a new perspective on the microbial processes.This book focuses on the basic aspects of the process with special emphasis on recent contributions regarding the chemical and microbial aspects of the bioleaching process and the use of microorganisms in the treatment of complex ores and concentrates. It has been written by recognized researchers in order to introduce the main subjects of microbial processing to undergraduate and postgraduate students, scientists working in this field as well as interested industrialists.
Reviews in Plasmonics is a comprehensive collection of current trends and emerging hot topics in the field of Plasmonics and closely related disciplines. It summarizes the years progress in Plasmonics and its applications, with authoritative analytical reviews specialized enough to be attractive to professional researchers, yet also appealing to the wider audience of scientists in related disciplines of Plasmonics.
This edited volume presents new data and insights from the most internationally respected PGE experts, representing a variety of disciplines ranging from chemistry, geochemistry, biology, environmental science to toxicology and environmental health. It builds upon three previous co-edited books published by Springer, Zereini and Alt (Eds.) (1999, 2000 and 2006), incorporating the most recent advances on the topic. The book covers the following topical areas related to PGE: sources and applications, analytical methods, environmental fate, bioavailability and chemical behaviour, use of bioindicators and human exposures and health risk potential. Highly interdisciplinary in orientation, this book is a comprehensive guide to academics, students and professionals working in a number of different scientific fields, who are interested in topics related to platinum metal emissions in the environment.
Laser shock peening (LSP) is a relatively new surface treatment for
metallic materials. LSP is a process to induce compressive residual
stresses using shock waves generated by laser pulses. LSP can
greatly improve the resistance of a material to crack initiation
and propagation brought on by cyclic loading and fatigue. This
pioneering book was the first of its kind to consolidate scattered
knowledge into one comprehensive volume. It describes the
mechanisms of LSP and its substantial role in improving fatigue
performance in terms of modification of microstructure, surface
morphology, hardness and strength. In particular it describes
numerical simulation techniques and procedures which can be adopted
by engineers and research scientists to design, evaluate and
optimise LSP processes in practical applications.
Structure of Metals GRYSTALLOGRAPHIG METHODS, PRINCIPLES, AND - DATA BY CHARLES H. BARRETT, PH. D. Associate Professor of Metallurgical Engineering and Member of Staff of the Metals Research Laboratory Carnegie Institute of Technology FIRST EDITION F 1 FT 1 1 I M PRESS ION MoGBAW-HILL BOOK COMPANY, INC. NEW YORK AND LONDON 1943 STRUCTURE OF MKTALS COPYRIGHT. 1943, BY THE MrGRAW-HiLL BOOK COMPANY, INC. PRINTED IK THB UNITED STATES OF AMERICA All rights reserved. This book, or parts thereof, may not be reproduced in any form without permission of the publishers. PREFACE This book is intended to serve both as a text and as a reference book. The portions intended for classroom use have been written for courses in crystallography, particularly the courses offered to students of metallurgy. It is primarily intended for graduate courses, but a number of chapters are at a level appropriate for advanced undergraduate courses in applied x-rays, crystallography, and physical metallurgy Chaps. I to IV, IX to XI, XIII. In an effort to make the book more readable, certain advanced topics on x-ray diffraction and various tables of data have been placed in appendixes, and laboratory manipulations that would not interest the general reader have been printed in smaller type. The first four chapters of this book explain the fundamentals of crystal lattices and projections, and the general principles of the diffrac tion of x-rays from Crystals. Chapters V to VII cover the technique of x-ray diffraction, presenting the operating details of the methods that are in common use. Several chapters are included on the applica tions of x-ray diffraction in the field of physical metallurgy, covering techniques fordetermining constitution diagrams, identifying unknown materials, determining crystal structures, determining the orientation of single crystals, detecting and analyzing preferred orientations, and measuring stresses. One chapter is devoted to electron diffraction, its metallurgical uses, and the precautions to be observed in interpreting electron diffrac tion data. The electron microscope receives only a brief mention because at the time the manuscript was written the metallographic technique for this instrument was still being rapidly developed and, except for particle-size determinations, the instrument had not yet achieved the status of a widely accepted tool in metallographic or crystallographic research. The last half of the book is devoted to the results of research and contains extensive reviews of fields that are of current interest. In assembling these summaries, an effort has been made to include an ade quate number of references to the literature, to cover thoroughly the subjects that have not been extensively reviewed in readily available publications, and to maintain a critical but unbiased attitude toward the data and conclusions that are reviewed. The subjects treated include the following principles governing the crystal structure of metals and vi PREPACK alloys supcrlattices and their effect on properties imperfections in crystals the structure of liquid metals the processes of slip, twinning, and fracture and modern theories of these processes, including the cur rent dislocation theory the effects of cold work and annealing on the structure of metals, including the effects on diffraction patterns of static and fatigue stressing, rolling, grinding, and polishing theresults of x-ray studies of internal stresses preferred orientations resulting from cold work, hot work, recrystallization, freezing, electrodeposition, evapora tion, and sputtering directionality in commercial products and in single crystals and its relation to crystal orientation. The author is indebted to many colleagues and graduate students who have assisted directly and indirectly in the preparation of this book. He particularly wishes to thank Dr. R. F...
Data on the synthesis and physicochemical studies of salts of mono- or dibasic unsaturated carboxylic acids and macromolecular metal carboxylates are generalised and described systematically in this monograph. The structures and properties of the COO group in various compounds and characteristic features of the structures of carboxylate are analysed. The main routes and kinetics of polymerisation transformations of unsaturated metal carboxylates are considered. The attention is focused on the effect of the metal ion on the monomer reactivity and the polymer morphology and structure. The possibility of stereochemical control of radical polymerisation of unsaturated metal carboxylates is demonstrated. The electronic, magnetic, optical, absorption and thermal properties of metal (co)polymers and nanocomposites and their main applications are also considered.
This book presents selected research papers of the AIMTDR 2014 conference on application of laser technology for various manufacturing processes such as cutting, forming, welding, sintering, cladding and micro-machining. State-of-the-art of these technologies in terms of numerical modeling, experimental studies and industrial case studies are presented. This book will enrich the knowledge of budding technocrats, graduate students of mechanical and manufacturing engineering, and researchers working in this area. |
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