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Ultrasound And Irrecoverable Deformation In Metals
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Book Synopsis Ultrasound and Irrecoverable Deformation in Metals by : Andrew Rusinko
Download or read book Ultrasound and Irrecoverable Deformation in Metals written by Andrew Rusinko and published by LAP Lambert Academic Publishing. This book was released on 2012-05 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical vibrations of ultrasonic frequency exert a considerable influence upon the mechanical properties of metals, in particular, their deformation characteristics. The following three phenomena are considered: ultrasonic softening, ultrasonic hardening and the influence of preliminary ultrasonic treatment upon the steady-state creep of metals. Ultrasonic softening takes place when a ultrasonic loading is superimposed upon a static one, which results in the decrease of static load needed to deform the metal. Ultrasonic hardening occurs during the sonication of annealed material without a static loading. The ultrasonic hardening manifests itself in the increase of the yield strength of material due to the defects of crystalline structure nucleated and developed in acoustic field. Ultrasonic treatment consists of the ultrasonic irradiation of material and subsequent annealing. Materials treated in such a way can offer a considerable resistance to creep deformation. However, this tendency is not a monotonic function of the preliminary sonification parameters. A new theory, the synthetic theory of irrecoverable deformation, is employed to model the phenomena discussed above.
Book Synopsis The Application of Ultrasonic Energy in the Deformation of Metals by : Alan R. Rosenfield
Download or read book The Application of Ultrasonic Energy in the Deformation of Metals written by Alan R. Rosenfield and published by . This book was released on 1963 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: On June 21 a symposium was sponsored by the Bureau of Naval Weapons on the application of ultrasonic energy in the deformation of metals. At this session, a number of investigators actively working in the field reported informally on the results of their research. The reports revealed that the results achieved by incorporating ultrasonic transducers into conventional metalforming and-cutting operations are sufficiently promising that the technique merits further attention. Data are available to indicate that application of ultrasonic vibrations during metal working can increase speeds, lower forces, and improve surface finishes. All of these results have been obtained without any observed difference in properties between ultrasonically and conventionally fabricated parts. (Author).
Book Synopsis Effects of Ultrasound on Deformation Characteristics of Structural Metals by : B. Langenecker
Download or read book Effects of Ultrasound on Deformation Characteristics of Structural Metals written by B. Langenecker and published by . This book was released on 1964 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-intensity ultrasound at 20 kc/sec is used in studies of mechanisms metal deformation and treatment. Quantitative details ab6ut the experimental conditions are providedin the five parts of this report: (1) modes of intense ultrasonic stress waves in rods and bars, (2) conversion of acoustic energy into heat, (3) applications of ultrasound at high-strain-rate tensile tests, (4) measurements of internal friction during high-intensity ultrasonic radiation of metals, and (5) discussion of ultrasonic metal deformation along with a comparison between our observations and other reports on the subject of ultrasonic metal forming processes. (Author).
Book Synopsis Effects of Ultrasound on Deformation Characteristics of Structural Metals, 1 July 1963-30 June 1964, Part 5. Discussion by : B. Langenecker
Download or read book Effects of Ultrasound on Deformation Characteristics of Structural Metals, 1 July 1963-30 June 1964, Part 5. Discussion written by B. Langenecker and published by . This book was released on 1965 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-intensity ultrasound at 20 kc/sec is used in studies of mechanisms of metal deformation and treatment. Quantitative details about the experimental conditions are provided in the five parts of this report: (1) modes of intense ultrasonic stress waves in rods and bars, (2) conversion of acoustic energy into heat, (3) applications of ultrasound at high-strain-rate tensile tests, (4) measurements of internal friction during high-intensity ultrasonic radiation of metals, and (5) discussion of ultrasonic metal deformation along with a comparison between our observations and other reports on the subject of ultrasonic metal forming processes. (Author).
Book Synopsis Effects of Ultrasound on Deformation Characteristics of Structural Metals 1 July 1963-30 June 1964. Part 1. Application of Photoelasticity by : W. H. Frandsen
Download or read book Effects of Ultrasound on Deformation Characteristics of Structural Metals 1 July 1963-30 June 1964. Part 1. Application of Photoelasticity written by W. H. Frandsen and published by . This book was released on 1964 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intense ultrasound having power levels up to 100 w/sq cm at 20 kc is used in studies of mechanisms of metal deformation and treatment. To provide accurate quantitative information about the underlying experimental conditions, Part 1 of this progress report describes detailed investigations of modes of propagation of intense ultrasonic stress waves in rods and bars. Part 2 will be concerned with measurements of conversion of acoustic energy into heat and kinetic energy of lattice imperfections. Parts 3 and 4 will illustrate experiments in which high strain rate tensile tests, and intense pulsed ultrasound were applied. A discussion of ultrasonic metal deformation will be given in the final Part 5 along with a comparison of our observations with results and viewpoints from other reports on this subject. (Author).
Book Synopsis Effects of Ultrasound on Deformation Characteristics of Structural Metals. Part 2. Acoustic Heating and Zone Melting by : B. LANGENECKER
Download or read book Effects of Ultrasound on Deformation Characteristics of Structural Metals. Part 2. Acoustic Heating and Zone Melting written by B. LANGENECKER and published by . This book was released on 1965 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-intensity ultrasound at 20 kc/sec is used in studies of mechanisms of metal deformation and treatment. Quantitative details about the experimental conditions are provided in the five parts of this report: (1) modes of intense ultrasonic stress waves in rods and bars, (2) conversion of acoustic energy into heat, (3) applications of ultrasound at high strain rate tensile tests, (4) measurements of internal friction during highintensity ultrasonic radiation of metals, and (5) discussion of ultrasonic metal deformation along with a comparison between our observations and other reports on the subject of ultrasonic metal forming processes. (Author).
Book Synopsis Metal Deformation with Ultrasound by : Donald Ray Culp
Download or read book Metal Deformation with Ultrasound written by Donald Ray Culp and published by . This book was released on 1972 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Ultrasound on Deformation Characteristics of Structural Metals, 1 July 1963-30 June 1964. Part 4. Internal Friction and Crystal Plasticity in Intense Ultrasonic Fields by : B. Langenecker
Download or read book Effects of Ultrasound on Deformation Characteristics of Structural Metals, 1 July 1963-30 June 1964. Part 4. Internal Friction and Crystal Plasticity in Intense Ultrasonic Fields written by B. Langenecker and published by . This book was released on 1965 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultrasound in Liquid & Solid Metals by : O. V. Abramov
Download or read book Ultrasound in Liquid & Solid Metals written by O. V. Abramov and published by Springer. This book was released on 1994-04-08 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasound in Liquid and Solid Metals focuses on the effect of intensive ultrasound on metals, including the analysis of the development of cavitation and acoustic flows in melts, mechanism of metals' spraying and crystallization, the formation of dislocation structure in crystals, diffusion, phase transformation, and plastic deformation. Physical fundamentals of intensive ultrasound effects are covered, and detailed discussions are presented on the engineering principles of equipment and material design for the practical use of ultrasound in the refining of melts, crystallization of ingots and molds, pulverization, plating, pressure working of metals, surface strengthening, and other processes.
Book Synopsis Acousto-plastic Deformation of Metals by Nonlinear Stress Waves by : Minghao Cai
Download or read book Acousto-plastic Deformation of Metals by Nonlinear Stress Waves written by Minghao Cai and published by . This book was released on 2006 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The present dissertation summarizes the results of research and development for elastic-plastic deformation of metals by nonlinear stress waves. The focus of the present work is the development of a new theoretical and numerical framework to simulate nonlinear stress waves in solids. The application of the new method focuses on modeling the plateau stage of a novel ultrasound welding process. Superimposed by ultrasonic vibrations, metal specimens under static loading experience remarkable transitory softening, which has been called the Blaha effect or the Acousto-Plastic Effect (APE). Previous microscopy studies showed that the metals experience significant plastic deformation and the morphology resembles the Kelvin-Helmholtz instability waves in the presence of shear stresses. The present research addresses the need to understand the APE beyond phenomenological descriptions in the literature. Theoretical and numerical studies have been performed to understand the unusual metal deformation induced by ultrasonic vibrations. A comprehensive continuum mechanics model for macroscopic description of nonlinear stress waves in solids has been developed, including conservation laws of mass, momentum, and energy in the Eulerian frame, in conjunction with a set of transport equations for stress components, which have been derived based on the elastic-plastic constitutive relation employed. The present approach aims to directly address the dynamic nature of the processes rather than treating transitory metal softening by proposing "effective constitutive relations" to relate the nominal "static stress" to the nominal "static strain." Various forms of the governing equations have been systematically derived. The eigensystem of each set of model equations has been analyzed in details with clear presentation of the analytical forms of eigenvalues and the associated eigenvector matrices. To solve these governing equations for the nonlinear stress waves, the space-time Conservation Element and Solution Element (CESE) method has been used. Numerical results of one- and two-dimensional elastic and elastic-plastic stress waves are reported in the dissertation. The numerical results are validated by a series of comparison between the one-dimensional numerical results of elastic and elastic-plastic waves and the available analytical solutions, experimental results and published numerical works.
Download or read book Metals and Materials written by and published by . This book was released on 1979 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Binder Characterization and Evaluation by : David A. Anderson
Download or read book Binder Characterization and Evaluation written by David A. Anderson and published by Strategic Highway Research Program (Shrp). This book was released on 1994 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Plasticity and Creep of Metals by : Andrew Rusinko
Download or read book Plasticity and Creep of Metals written by Andrew Rusinko and published by Springer Science & Business Media. This book was released on 2011-07-24 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves both as a textbook and a scientific work. As a textbook, the work gives a clear, thorough and systematic presentation of the fundamental postulates, theorems and principles and their applications of the classical mathematical theories of plasticity and creep. In addition to the mathematical theories, the physical theory of plasticity, the book presents the Budiansky concept of slip and its modification by M. Leonov. Special attention is given to the analysis of the advantages and shortcomings of the classical theories. In its main part, the book presents the synthetic theory of irreversible deformations, which is based on the mathematical Sanders flow plasticity theory and the physical theory, the Budiansky concept of slip. The main peculiarity of the synthetic theory is that the formulae for both plastic and creep deformation, as well their interrelations, can be derived from the single constitutive equation. Furthermore, the synthetic theory, as physical one, can take into account the real processes that take place in solids at irreversible deformation. This widens considerably the potential of the synthetic theory. In the framework of the synthetic theory such problems as creep delay, the Hazen-Kelly effect, the deformation at the break of the load trajectory, the influence of the rate of loading on the stress-strain diagram, creep at the changes of load, creep at unloading and reversed creep, have been analytically described. In the last chapter, the book shows the solution of some contemporary problems of plasticity and creep: Creep deformation at cyclic abrupt changes of temperature, The influence of irradiation on the plastic and creep deformation, Peculiarities of deformation at the phase transformation of some metals.
Download or read book Hot Embossing written by Matthias Worgull and published by William Andrew. This book was released on 2009-09-28 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an overview of replication technology for micro- and nanostructures, focusing on the techniques and technology of hot embossing, a scaleable and multi-purpose technology for the manufacture of devices such as BioMEMS and microfluidic devices which are expected to revolutionize a wide range of medical and industrial processes over the coming decade.The hot embossing process for replicating microstructures was developed by the Forschungszentrum Karlsruhe (Karlsruhe Institute of Technology) where the author is head of the Nanoreplication Group. Worgull fills a gap in existing information by fully detailing the technology and techniques of hot embossing. He also covers nanoimprinting, a process related to hot embossing, with examples of actual research topics and new applications in nanoreplication. A practical and theoretical guide to selecting the materials, machinery and processes involved in microreplication using hot embossing techniques Compares different replication processes such as: micro injection molding, micro thermoforming, micro hot embossing, and nanoimprinting Details commercially available hot embossing machinery and components like tools and mold inserts
Book Synopsis Introduction to Permanent Plug and Abandonment of Wells by : Mahmoud Khalifeh
Download or read book Introduction to Permanent Plug and Abandonment of Wells written by Mahmoud Khalifeh and published by Springer Nature. This book was released on 2020-01-27 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book offers a timely guide to challenges and current practices to permanently plug and abandon hydrocarbon wells. With a focus on offshore North Sea, it analyzes the process of plug and abandonment of hydrocarbon wells through the establishment of permanent well barriers. It provides the reader with extensive knowledge on the type of barriers, their functioning and verification. It then discusses plug and abandonment methodologies, analyzing different types of permanent plugging materials. Last, it describes some tests for verifying the integrity and functionality of installed permanent barriers. The book offers a comprehensive reference guide to well plugging and abandonment (P&A) and well integrity testing. The book also presents new technologies that have been proposed to be used in plugging and abandoning of wells, which might be game-changing technologies, but they are still in laboratory or testing level. Given its scope, it addresses students and researchers in both academia and industry. It also provides information for engineers who work in petroleum industry and should be familiarized with P&A of hydrocarbon wells to reduce the time of P&A by considering it during well planning and construction.
Book Synopsis Internal Friction in Metallic Materials by : Mikhail S. Blanter
Download or read book Internal Friction in Metallic Materials written by Mikhail S. Blanter and published by Springer. This book was released on 2010-11-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a unique collection of experimental data in the field of internal friction, anelastic relaxation, and damping properties of metallic materials. It reviews virtually all anelastic relaxation phenomena ever published. The reader is also supplied with explanations of the basic physical mechanisms of internal friction, a summary of typical effects for different groups of metals, and more than 2000 references to original papers.
Book Synopsis Catheter-Based Cardiovascular Interventions by : Peter Lanzer
Download or read book Catheter-Based Cardiovascular Interventions written by Peter Lanzer and published by Springer Science & Business Media. This book was released on 2012-08-01 with total page 1029 pages. Available in PDF, EPUB and Kindle. Book excerpt: Operator skills, and in particular decision-making and strategic skills, are the most critical factor for the outcome of catheter-based cardiovascular interventions. Currently, such skills are commonly developed by the empirical trial and error method only. In this textbook, for the first time, an explicit teaching, training, and learning approach is set out that will enable interventional operators, whether cardiologists, vascular surgeons, vascular specialists, or radiologists, to learn about and to develop the cognitive skills required in order to achieve consistent expert-level catheter-based interventions. It is anticipated that adoption of this approach will allow catheter-based interventions to become a domain of excellence, with rapid transfer of knowledge, steep learning curves, and highly efficient acquisition of complex skills by individual operators — all of which are essential to meet successfully the challenges of modern cardiovascular care.
