Download or read book Ultrafine Grained Materials II written by Yuntian Theodore Zhu and published by John Wiley & Sons. This book was released on 2013-09-25 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium sponsored by the Shaping and Forming Committee of the Materials Processing and Manufacturing Division (MPMD) and the Mechanical Behavior Committee (Jt. SMD/ASM-MSCTS) of the Structural Materials Division (SMD) of TMS (The Minerals, Metals & Materials Society) and held during the 2002 TMS Annual Meeting in Seattle, Washington February 17-21,2002.
Download or read book Superplasticity of Ultra Fine Grained Aluminium Alloys written by R. Valiev and published by . This book was released on 1997 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superplasticity requires a fine grain size, typically in the range of 1 - 10 microns. Experiments have established that much finer grain sizes, in the near-nanometer range, may be achieved in Al-based alloys by using an intense plastic straining technique such as equal-channel angular (ECA) pressing. This report presents the microstructural characteristics and mechanical properties of several ultrafine-grained Al-based alloys processed by ECA pressing. The first demonstration of enhanced superplasticity at low temperatures and high strain rates revealed in commercial Al-alloys, having ultrafine-grained structure, are described.
Download or read book Research and Application of Advanced Superplasticity in Ultrafine Grained Aluminum Alloys and Composites written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafine grained Al 1420 alloy and Al 6061 composite were processed by severe plastic deformation. The requirements to achieve high strain rate superplasticity in the UFG Al 1420 alloy are discussed. Examples of complex shape articles fabricated by high strain rate superplastic forming are demonstrated.
Download or read book Superplasticity and Grain Boundaries in Ultrafine Grained Materials written by Peter M. Burgess and published by Elsevier. This book was released on 2011-05-31 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superplasticity is a state in which solid crystalline materials, such as some fine-grained metals, are deformed well beyond their usual breaking point. The phenomenon is of importance in processes such as superplastic forming which allows the manufacture of complex, high-quality components in such areas as aerospace and biomedical engineering.Superplasticity and grain boundaries in ultrafine-grained materials discusses a number of problems associated with grain boundaries in metallic polycrystalline materials. The role of grain boundaries in processes such as grain boundary diffusion, relaxation and grain growth is investigated. The authors explore the formation and evolution of the microstructure, texture and ensembles of grain boundaries in materials produced by severe plastic deformation.Written by two leading experts in the field, Superplasticity and grain boundaries in ultrafine-grained materials significantly advances our understanding of this important phenomenon and will be an important reference work for metallurgists and those involved in superplastic forming processes. - Discusses significant problems associated with grain boundaries in polycrystals incorporating structural superplasticity and grain boundary sliding - Assesses the role of grain boundaries in processes such as grain boundary diffusion, relaxation and grain growth - Explores the formation and evolution of the microstructure, texture and ensembles of grain boundaries in materials produced by severe plastic deformation
Download or read book Research and Application of Advanced Superplasticity in Ultra Fine Grained Aluminum Alloys and Compositions written by R. Valiev and published by . This book was released on 1998 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials for investigations were selected and purchased. The results of structural characterization of ultrafine-grained A16061+10%Al2O3 composite processed by equal channel angular pressing are presented. In order to extend a range of industrial applications of ultrafine-grained Al alloys and composites, the ECA pressing die for processing the specimens of 40 mm in diameter and 150 nm in length was designed.
Download or read book Aluminum Lithium Alloys written by S. Balasivanandha Prabu and published by Elsevier Inc. Chapters. This book was released on 2013-09-20 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the late 1950s, lithium is being used as an alloying element in aluminum. Their excellent ductility, which allows superplastic forming, along with their ability to decrease the density, makes aluminum-lithium alloys a primary choice for many structural applications in aerospace industry. This chapter initially discusses the processes and mechanisms that give rise to significant plasticity/Superplasticity in these alloy systems. The superplastic behavior of Al-Li alloys and their applications in forming are then discussed. The thickness variation during superplastic forming strongly depends on the peak strain rate sensitivity index (m) of the material, and an increase in the m value reduces the thickness variation in the formed component. The factors that help increase the value of m are enumerated. Superplastic forming is carried out at temperatures ≥ 0.5 Tm (Tm is the absolute melting temperature), often closer to 0.7 − 0.8 Tm. Significant cavitation and grain growth are present at such high temperatures. This has ushered in low temperature superplastic forming by the production of ultra-fine grain sizes via dispersion strengthening and severe plastic deformation (SPD). The promise of superplastic forming of Al-Li alloys for the future and the factors including cost that limit the use of Al-Li alloys are also discussed.
Download or read book Superplasticity in Metals and Ceramics written by T. G. Nieh and published by Cambridge University Press. This book was released on 1997-01-23 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes advances in the field of superplasticity, the ability of certain materials to undergo very large tensile strains. This phenomenon has increasing commercial applications, but also presents a fascinating scientific challenge in attempts to understand the physical mechanisms that underpin it. The authors emphasize the materials aspects of superplasticity. Beginning with a brief history of the phenomenon, they describe the two major types of superplasticity-- fine-structure and internal-stress superplasticity-- and discuss their operative mechanisms. They also present microstructural factors controlling the ductility and fracture in superplastic materials. Observations of superplasticity in metals (including aluminum, magnesium, iron, titanium and nickel), ceramics (including monoliths and composites), intermetallics (including iron, nickel, and titanium base), and laminates are thoroughly described. This is a valuable text for graduate students and researchers in materials science and engineering.
Download or read book Superplasticity of Alloys Intermetallides and Ceramics written by Oscar A. Kaibyshev and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superplasticity is shown to be a universal phenomenon in materials ranging from metals and intermetallics to ceramics. Superplastic deformation facilitates the production of materials with specifically chosen properties. This is illustrated using the examples of Mg-, Al-, and Ti-based commercial alloys, steels, and superalloys. Some of the strenghts of this book are: the broad range of materials studied, the reduction of scientific results to a form suitable for the practitioner, a profound physical analysis of the phenomenon, a new approach to superplastic treatment as a kind of strain-heat treatment, the presentation of new data on superplastic flow and on production techniques of micro- and submicrocrystalline structures.
Download or read book Superplasticity and Grain Boundaries in Ultrafine Grained Materials written by Alexander P. Zhilyaev and published by Academic Press. This book was released on 2020-11-21 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superplasticity and Grain Boundaries in Ultrafine-Grained Materials, Second Edition, provides cutting-edge modeling solutions surrounding the role of grain boundaries in processes such as grain boundary diffusion, relaxation and grain growth. In addition, the book's authors explore the formation and evolution of the microstructure, texture and ensembles of grain boundaries in materials produced by severe plastic deformation. This updated edition, written by leading experts in the field, has been revised to include new chapters on the basics of nanostructure processing, the influence of deformation mechanisms on grain refinement, processing techniques for ultrafine-grained and nanostructured materials, and much more. - Provides practical applications and methods for the proper implementation of models, allowing for more effective complex metal forming processes - Features new chapters on the microstructure, mechanical behavior and functional properties of HCP metals, processing ultrafine-grained and nanostructured materials, and more - Covers experimental assessment and computational modeling techniques for adiabatic heating and saturation of grain refinement during SPD of metals and alloys
Download or read book Aluminium Alloys and Composites written by Kavian Cooke and published by BoD – Books on Demand. This book was released on 2020-03-04 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminium (Al) is a metal of great importance because of its excellent corrosion resistance, high electrical and thermal conductivity, good reflectivity, and very good recycling characteristics. The properties of heat-treatable Al-alloys can be further enhanced by the inclusion of a reinforcing phase that increases the mechanical properties of the overall composite. This book is a comprehensive guide on the different types of aluminum alloys and the new advances that have been made in developing and manufacturing aluminum alloys and composites. This text provides a comprehensive overview of the processing, formability, and chemical composition of aluminum alloys and composites. Part One is focused on evaluating the types and properties of advanced aluminum alloys and composites, while Part Two explores characterization. The advantage of this book is that it provides a detailed review of major advances that have occurred in the development and application of aluminum alloys and composites while outlining a development strategy for these materials.
Download or read book Ultrafine Grained Materials written by Ruslan Z. Valiev and published by Springer Nature. This book was released on with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Creep in Metals and Alloys written by Michael E. Kassner and published by Elsevier. This book was released on 2004-04-06 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: * Numerous line drawings with consistent format and units allow easy comparison of the behavior of a very wide range of materials * Transmission electron micrographs provide a direct insight in the basic microstructure of metals deforming at high temperatures * Extensive literature review of over 1000 references provide an excellent reference document, and a very balanced discussionUnderstanding the strength of materials at a range of temperatures is critically important to a huge number of researchers and practitioners from a wide range of fields and industry sectors including metallurgists, industrial designers, aerospace R&D personnel, and structural engineers. The most up-to date and comprehensive book in the field, Fundamentals of Creep in Metals and Alloys discusses the fundamentals of time-dependent plasticity or creep plasticity in metals, alloys and metallic compounds. This is the first book of its kind that provides broad coverage of a range of materials not just a sub-group such as metallic compounds, superalloys or crystals. As such it presents the most balanced view of creep for all materials scientists. The theory of all of these phenomena are extensively reviewed and analysed in view of an extensive bibliography that includes the most recent publications in the field. All sections of the book have undergone extensive peer review and therefore the reader can be sure they have access to the most up-to-date research, fully interrogated, from the world's leading investigators.· Numerous line drawings with consistent format and units allow easy comparison of the behavior of a very wide range of materials· Transmission electron micrographs provide a direct insight in the basic microstructure of metals deforming at high temperatures· Extensive literature review of over 1000 references provide an excellent reference document, and a very balanced discussion
Download or read book Achieving a Superplastic Forming Capability Through Severe Plastic Deformation written by and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Processing by severe plastic deformation (SPD) leads to very significant grain refinement in metallic alloys. Furthermore, if these ultra fine grains are reasonably stable at elevated temperatures, there is a potential for achieving high tensile ductilities, and superplastic elongations, in alloys that are generally not superplastic. In addition, the production of ultra fine grains leads to the occurrence of superplastic flow at strain rates that are significantly faster than in conventional alloys so that processing by SPD introduces the possibility of using these alloys for the rapid fabrication of complex parts through superplastic forming operations. This paper examines the development of superplasticity in various aluminum alloys processed by equal-channel angular pressing (ECAP).
Download or read book Developing a High Strain Rate Superplastic Forming Capability in Aluminum Alloys written by and published by . This book was released on 2003 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The applications for superplastic forming (SPF) are currently limited because the strain rates involved in the forming process tend to be relatively slow (typically 10(exp -3)-10 (exp -1) 1 s(exp -1). There would be a very significant increase in the applications for SPF if the forming rates were increased to 10(exp -1) 1 s(exp -1). It can be shown on theoretical grounds that SPF-may be achieved at faster rates by reducing the grain size of the superplastic material. Unfortunately, it is generally not possible to achieve grain sizes as small as the submicrometer level using conventional thermo-mechanical processing. This paper demonstrates the potential for achieving ultrafine grain sizes through the application of severe plastic deformation. It is shown that two aluminum- based alloys exhibit superplastic elongations at very rapid strain rates when the alloys are processed using the procedure of Equal-Channel Angular Pressing (ECAP) in which the samples are pressed through a die containing a channel bent into an L-shaped configuration. It is demonstrated also that samples processed by ECAP can be Superplastically formed at very rapid strain rates.
Download or read book Superplasticity of Fine Grained Aluminum Alloys written by José M. Belzunce and published by . This book was released on 1983* with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superplasticity in Advanced Materials written by José María Cabrera Marrero and published by Materials Research Forum LLC. This book was released on 2023-09-01 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents practical and theoretical works on superplasticity in metals and ceramics, on deformation mechanisms, on processes to obtain large ultrafine-grained structures, on advanced characterization techniques, and on hot deformation of advanced materials. Key papers focus on (1) processing of metallic alloys for achieving exceptional superplastic properties, (2) high-pressure sliding (HPS) processes, (3) in-situ neutron and synchrotron methods, and (4) ultra-severe plastic deformation. Keywords: Superplasticity, Superfunctionality, High-pressure Sliding, High-pressure Torsion, Precise Forming, Numerical Simulation, Aeronautical Parts, Near-unconstrained Superplastic Parts, Low-temperature Superplasticity, Friction Stir Processing, Microstructure Evolution, Corrosion Properties, Duplex Stainless Steel, Grain Boundary Sliding, Laminated Materials, Asymmetric Hot Rolling, Uniaxial Hot Pressing, Diffusion Bonding.
Download or read book Superplasticity written by Oskar Akramovich Kaĭbyshev and published by . This book was released on 2005 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The remarkable technology of superplastic forming was developed and perfected in the former Soviet Union. This volume, written by two Russian scientists at the Institute for Metals Superplasticity Problems in Ufa, Bashkortostan, Russia (of which Kaibyshev was the former director), presents a detailed and up-to-date treatment of the technology, with particular attention to the production of ultrafine grain materials, their use in superplastic shaping and forming, practical aspects of the process, and new developments in submicrocrystalline and nanocrystalline materials production. The comprehensive bibliography of the largely Russian literature will be a valuable resource for the serious scientist. Specialists in machine building and metallurgy, as well as graduate students and researchers will be the book's audience. Annotation :2004 Book News, Inc., Portland, OR (booknews.com).
