Download or read book Spatially Resolved In situ Monitoring of Crack Growth Via the Coupling Current in Aluminum Alloy 5083 written by Krystaufeux Williams and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The work discussed in this dissertation is an experimental validation of a body of research that was created to model stress corrosion cracking phenomenon for 304 stainless steels in boiling water reactors. This coupled environment fracture model (CEFM) incorporates the natural laws of the conservation of charge and the differential aeration hypothesis to predict the amount of stress corrosion crack growth as a function of many external environmental variables, including potential, stress intensity, solution conductivity, oxidizer concentrations, and various other environmental parameters. Out of this approach came the concept of the coupling current; a local corrosion current that flows from within cracks, crevices, pits, etc... of a metal or alloy to the external surface. Because of the deterministic approach taken in the mentioned research, the coupling current analysis and CEFM model can be applied to the specific problem of SCC in aluminum alloy 5083 (the alloy of interest for this dissertation that is highly sought after today because of its corrosion resistance and high strength to weight ratio). This dissertation research is specifically devoted to the experimental verification of the coupling current, which results from a coupling between the crack's internal and external environments, by spatially resolving them using the scanning vibrating probe (SVP) as a tool. Hence, through the use of a unique fracture mechanics setup, simultaneous mechanical and local electrochemical data may be obtained, in situ.The SVP is an alternating current device designed to obtain highly localized potential gradients (with a best resolution of microns) in a solution conductivity of 100s of [mu]S/cm. In order to enhance resolution of the SVP maps as much as possible, without being too far away from the desired test conditions of 0.6M saltwater (utilized in the lab as a substitute for seawater), dilution of the saltwater by an order of magnitude (0.06 M) was used throughout all experiments unless otherwise noted. Initial experiments of localized corrosion events from 10s of micron to mm-sized galvanic couples were first mapped in order to obtain confidence in the ability to map the current flowing through the solution above a stress corrosion crack. Furthermore, because of these feasibility studies, the current density that flows between an alloys matrix to or from an intermetallic compound can be spatially mapped as well.Standard fracture mechanics of AA5083-H116 bend bars were performed in diluted saltwater (0.06M) to obtain the critical fracture toughness for cracking in air and in saltwater. During loading in a bending test setup, standard load and crack mouth opening signals were obtained until the sample broke, or until the crack arrested. It was discovered that when the data was analyzed by plotting the load as a function of crack mouth opening displacement, the critical stress intensity (air), or threshold stress intensity (electrolyte) could be determined by identifying the decreasing of unload/reload slopes from a constant value. Transitions to and from different characteristic zones of cracking (different characteristics for different environments) are observed in the provided light and scanning electron microscopy images.The posited existence of the coupling current provides a different and more convenient marker for analyzing stress corrosion cracking, corrosion fatigue, and other forms of localized corrosion attack involving applied loads. For the first time, through the research in this dissertation, the positive current flowing from a crack were mapped, in situ, providing the changes in the anodic current density through the solution as a function of position. A collage of SVP maps were constructed on a grand scale according to their observed location with the light microscope by using features (such as the notch, or the growing crack) from the larger SVP maps taken at lower fracture toughness values with less resolution. These larger maps were then lined up with the extremes of the same features in smaller, SVP maps taken at a later time with a new location and higher resolution to keep up with the advancing crack tip. From that collage, a crack length vs. time graph was plotted to examine the characteristics of the crack growth. Finally, a crack growth rate vs. fracture toughness trend was constructed to compare with the CEFM and other studies on stress corrosion cracking of AA5083.In order to accommodate the expansion of the CEFM to predict crack growth in heavily sensitized AA5083 specimens, more electrochemical data (i.e., polarization scans taken from recent literature and compiled in this dissertation) was needed. The experimental findings from this dissertation also contributed to the model's expansion with the spatial analysis of the crack internal and external environments. Future work will incorporate testing of the more sensitive specimen orientations, acoustic emission analysis for probing micro-fracture processes, and coating effectiveness for SCC mitigation.

Download or read book Metals Abstracts written by and published by . This book was released on 1993 with total page 1220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Japanese Science and Technology written by and published by . This book was released on 1986 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Nondestructive Evaluation 4 0 written by Norbert Meyendorf and published by Springer. This book was released on 2022-03-09 with total page 1263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook comprehensively covers the cutting-edge trends and techniques essential for the integration of nondestructive evaluation (NDE) into the changing face of the modern industrial landscape. In particular, it delves into the marriage of NDE with new techniques in e.g. data mining, cloud computing and autonomous operation, highlighting the potential for cyber-physical controlled production and discussing the myriad possible applications across many different industries. The Handbook of NDE 4.0 centers around the Internet of Things and Industry 4.0 – the next generation of industrial production encompassing all aspects of networking across all industrial areas. It discusses the adaptation of existing NDE techniques to emerging new technological areas, such as 3D printing, via the introduction of cyber systems into the inspection and maintenance processes. In addition, the handbook covers topics such as the management and processing of big data with respect to real-time monitoring of structural integrity and reliable inspection of individual components. Remote NDE to include competence not available on-site will be a potential technique to increase reliability of NDE inspections by integrating additional specialist inputs into the decision process by methods such as telepresence, thereby better leveraging the scarce resources of senior inspectors into industrial inspections at multiple sites. The handbook houses a wealth of essential information to help academics, industry professionals and entrepreneurs navigate through this burgeoning new field. The material in this handbook is presented with the intention of ultimately improving human safety through reliable inspections and dependable maintenance of critical infrastructure, while also enhancing business value through reduced downtime, affordable maintenance, and talent optimization.

Download or read book Extrusion of Aluminium Alloys written by T. Sheppard and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years the importance of extruded alloys has increased due to the decline in copper extrusion, increased use in structural applications, environmental impact and reduced energy consumption. There have also been huge technical advances. This text provides comprehensive coverage of the metallurgical, mathematical and practical features of the process.

Download or read book Stress Corrosion Cracking written by V S Raja and published by Elsevier. This book was released on 2011-09-22 with total page 817 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of stress corrosion cracking (SCC), which causes sudden failure of metals and other materials subjected to stress in corrosive environment(s), has a significant impact on a number of sectors including the oil and gas industries and nuclear power production. Stress corrosion cracking reviews the fundamentals of the phenomenon as well as examining stress corrosion behaviour in specific materials and particular industries. The book is divided into four parts. Part one covers the mechanisms of SCC and hydrogen embrittlement, while the focus of part two is on methods of testing for SCC in metals. Chapters in part three each review the phenomenon with reference to a specific material, with a variety of metals, alloys and composites discussed, including steels, titanium alloys and polymer composites. In part four, the effect of SCC in various industries is examined, with chapters covering subjects such as aerospace engineering, nuclear reactors, utilities and pipelines. With its distinguished editors and international team of contributors, Stress corrosion cracking is an essential reference for engineers and designers working with metals, alloys and polymers, and will be an invaluable tool for any industries in which metallic components are exposed to tension, corrosive environments at ambient and high temperatures. Examines the mechanisms of stress corrosion cracking (SCC) presenting recognising testing methods and materials resistant to SCC Assesses the effect of SCC on particular metals featuring steel, stainless steel, nickel-based alloys, magnesium alloys, copper-based alloys and welds in steels Reviews the monitoring and management of SCC and the affect of SCC in different industries such as petrochemical and aerospace

Download or read book Stress corrosion Cracking written by Russell H. Jones and published by ASM International(OH). This book was released on 1992 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details the many conditions under which stress-corrosion cracking (SCC) can occur, the parameters which control SCC, and the methodologies for mitigating and testing for SCC, plus information on mechanisms of SCC with experimental data on a variety of materials. Contains information about environmen

Download or read book Additive Friction Stir Deposition written by Hang Z. Yu and published by Elsevier. This book was released on 2022-07-19 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive Friction Stir Deposition is a comprehensive summary of the state-of-the-art understanding on this emerging solid-state additive manufacturing technology. Sections cover additive friction stir deposition, encompassing advances in processing science, metallurgical science and innovative applications. The book presents a clear description of underlying physical phenomena, shows how the process determines the printing quality, covers resultant microstructure and properties in the as-printed state, highlights its key capabilities and limitations, and explores niche applications in repair, cladding and multi-material 3D printing. Serving as an educational and research guide, this book aims to provide a holistic picture of additive friction stir deposition-based solid-state additive manufacturing as well as a thorough comparison to conventional beam-based metal additive manufacturing, such as powder bed fusion and directed energy deposition. Provides a clear process description of additive friction stir deposition and highlights key capabilities Summarizes the current research and application of additive friction stir deposition, including material flow, microstructure evolution, repair and dissimilar material cladding Discusses future applications and areas of research for this technology

Download or read book Advanced Joining Processes written by Lucas F. M. da Silva and published by Springer Nature. This book was released on 2020-03-31 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent material science-based and mechanical analysis-based advances in joining processes. It includes all related processes, e.g. friction stir welding, joining by plastic deformation, laser welding, clinch joining, and adhesive bonding, as well as hybrid joints. It gathers selected full-length papers from the 1st Conference on Advanced Joining Processes.

Download or read book Hybrid Laser Arc Welding written by F O Olsen and published by Elsevier. This book was released on 2009-06-26 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid laser-arc welding (HLAW) is a combination of laser welding with arc welding that overcomes many of the shortfalls of both processes. This important book gives a comprehensive account of hybrid laser-arc welding technology and applications. The first part of the book reviews the characteristics of the process, including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality. Part two discusses applications of the process to such metals as magnesium alloys, aluminium and steel as well as the use of hybrid laser-arc welding in such sectors as ship building and the automotive industry. With its distinguished editor and international team of contributors, Hybrid laser-arc welding is a valuable source of reference for all those using this important welding technology. Reviews arc and laser welding including both advantages and disadvantages of the hybrid laser-arc approach Explores the characteristics of the process including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality Examines applications of the process including magnesium alloys, aluminium and steel with specific focus on applications in the shipbuilding and automotive industries

Download or read book Engineering Materials 2 written by Michael F. Ashby and published by Elsevier. This book was released on 2014-06-28 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a thorough explanation of the basic properties of materials; of how these can be controlled by processing; of how materials are formed, joined and finished; and of the chain of reasoning that leads to a successful choice of material for a particular application. The materials covered are grouped into four classes: metals, ceramics, polymers and composites. Each class is studied in turn, identifying the families of materials in the class, the microstructural features, the processes or treatments used to obtain a particular structure and their design applications. The text is supplemented by practical case studies and example problems with answers, and a valuable programmed learning course on phase diagrams.

Download or read book Fatigue of Materials II written by T. S. Srivatsan and published by John Wiley & Sons. This book was released on 2012-10-19 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second International Symposium of Fatigue of Materials:Advances and Emergences in Understanding is a five-sessionsymposium held in conjunction with the Materials Science andTechnology Conference 2012 (MS&T 2012) at Pittsburgh,Pennsylvania, during October 7-11, 2012. The abstracts that weresubmitted for presentation at this symposium cover a diverse rangeof topics. We have made an attempt to group these papers intosessions that focus on closely-related topics. However, as can beexpected, many of the papers could fit into more than one session.In the ensuing discussion, we provide a cohesive, complete andcompelling overview of the symposium as well as a summary of theabstracts that were submitted. Session 1(Overview 1) and Session 2(Overview II) contain papers that (i) Review the current state of knowledge both related andrelevant to the subject of fatigue behavior of materials, and (ii) New, innovative, and emerging techniques for experimentalevaluation of the fatigue behavior. In concurrence the papers attempt to analyze the data foraspects relevant to design and simultaneously predicting the usefullife of components and structures. Session 3 (AerospaceMaterials I) and Session 4 (Aerospace MaterialsII) focus on advanced materials that are used inperformance-critical applications in the aerospace and automotiveindustries, such as the alloys of titanium, nickel, aluminum, andmagnesium. Session 5 is a collection of papers relating toother materials of engineering interest, such as iron andsteel, polymer, rubber, and even composites. In the summarypresented below, the session number and paper number are identifiedby S and P. Topics related to the influence of both processing and theenvironment are covered in papers presented in all the sessions ofthis symposium, and are briefly summarized here as a group withadditional discussion included in the individual sessions.

Download or read book Stress corrosion Cracking of Aluminum Alloys written by F. H. Haynie and published by . This book was released on 1966 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report deals with the stress-corrosion cracking of aluminum alloys, and it represents an effort by DMIC to expand on the information contained in DMIC Memorandum 202, 'Stress-Corrosion Cracking of Aluminum Alloys', dated February 15, 1965. DMIC Report 228 begins by presenting a comprehensive definition of stress-corrosion cracking. This is followed by sections dealing with (1) the historical development and growth in awareness of the problem, (2) the mechanisms involved, and (3) the theory of stress-corrosion cracking. A section on experimental techniques is presented. These techniques include test methods used to determine the susceptibility of alloys to stress-corrosion cracking, as well as more refined methods of studying the fundamental mechanisms of the problem. Different evaluation methods, applicable to obtaining the different objectives of stress-corrosion testing, are also presented. All of the foregoing serve as background to the sections on stress-corrosion-cracking behavior of aluminum alloys and preventive measures. (Author).

Download or read book Aluminum Structures written by J. Randolph Kissell and published by John Wiley & Sons. This book was released on 2002-10-02 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the First Edition: "The book is a success in providing a comprehensive introduction to the use of aluminum structures . . . contains lots of useful information." —Materials & Manufacturing Processes "A must for the aluminum engineer. The authors are to be commended for their painstaking work." —Light Metal Age Technical guidance and inspiration for designing aluminum structures Aluminum Structures, Second Edition demonstrates how strong, lightweight, corrosion-resistant aluminum opens up a whole new world of design possibilities for engineering and architecture professionals. Keyed to the revised Specification for Aluminum Structures of the 2000 edition of the Aluminum Design Manual, it provides quick look-up tables for design calculations; examples of recently built aluminum structures-from buildings to bridges; and a comparison of aluminum to other structural materials, particularly steel. Topics covered include: Structural properties of aluminum alloys Aluminum structural design for beams, columns, and tension members Extruding and other fabrication techniques Welding and mechanical connections Aluminum structural systems, including space frames, composite members, and plate structures Inspection and testing Load and resistance factor design Recent developments in aluminum structures

Download or read book Friction Stir Welding and Processing in Alloy Manufacturing written by Carlos Agelet de Saracibar and published by MDPI. This book was released on 2019-08-02 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue Friction Stir Welding and Processing in Alloy Manufacturingthat was published in Metals

Download or read book Elements of Metallurgy and Engineering Alloys written by Flake C. Campbell and published by ASM International. This book was released on 2008-01-01 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical reference provides thorough and systematic coverage on both basic metallurgy and the practical engineering aspects of metallic material selection and application.

Download or read book Light Alloys written by Ian Polmear and published by Elsevier. This book was released on 2005-11-11 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive overview of the science and metallurgy of aluminum, magnesium, titanium and beryllium alloys, this is the only book available covering the background materials science, properties, manufacturing processes and applications of these key engineering metals in a single accessible volume. Use of these metals is now more widespread than ever, and they are routinely found in motor vehicles and aircraft. New material includes materials characteristics and applications; heat treatment properties; fabrication; microstructure/property relationships; new applications and processes. The definitive single volume overview New material on processing, characteristics and applications of these essential metals Covers the latest applications and processes in the auto and aero industries