Download or read book Development Program for Natural Aging Aluminum Casting Alloys written by Dr. Geoffrey K. Sigworth and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of 7xx aluminum casting alloys are based on the ternary Al-Zn-Mg system. These alloys age naturally to high strength at room temperature. A high temperature solution and aging treatment is not required. Consequently, these alloys have the potential to deliver properties nearly equivalent to conventional A356-T6 (Al-Si-Mg) castings, with a significant cost saving. An energy savings is also possible. In spite of these advantages, the 7xx casting alloys are seldom used, primarily because of their reputation for poor castibility. This paper describes the results obtained in a DOE-funded research study of these alloys, which is part of the DOE-OIT ''Cast Metals Industries of the Future'' Program. Suggestions for possible commercial use are also given.
Download or read book Development Program on Natural Aging Alloys written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of 7xx aluminum casting alloys are based on the ternary Al-Zn-Mg system. These alloys age naturally to high strength at room temperature. A high temperature solution and aging treatment is not required. Consequently, these alloys have the potential to deliver properties nearly equivalent to conventional A356-T6 (Al-Si-Mg) castings, with a significant cost saving. An energy savings is also possible. In spite of these advantages, the 7xx casting alloys are seldom used, primarily because of their reputation for poor castibility. This paper describes the results obtained in a DOE-funded research study of these alloys, which is part of the DOE-OIT ''Cast Metals Industries of the Future'' Program. Suggestions for possible commercial use are also given.
Download or read book Diffusion in Solids written by Helmut Mehrer and published by Springer Science & Business Media. This book was released on 2007-07-24 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the central aspects of diffusion in solids, and goes on to provide easy access to important information about diffusion in metals, alloys, semiconductors, ion-conducting materials, glasses and nanomaterials. Coverage includes diffusion-controlled phenomena including ionic conduction, grain-boundary and dislocation pipe diffusion. This book will benefit graduate students in such disciplines as solid-state physics, physical metallurgy, materials science, and geophysics, as well as scientists in academic and industrial research laboratories.
Download or read book Army Research and Development written by and published by . This book was released on 1971 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book THE INFLUENCE OF PRIOR NATURAL AGING ON ARTIFICIAL AGE HARDENING IN AL MG SI ALLOYS written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : Aluminum alloys of the 6000 series (Al-Mg-Si) are among the most prevalent and established structural materials in the world. Their use dates back decades, and currently they are crucial to the construction and transportation industries. One of the primary reasons for this is heat-treatability, i.e. the ability to control strength and ductility relationships with a relatively low temperature artificial aging treatment. Although multiple aluminum alloys can be employed for this purpose (e.g. 2000, 7000 series), Al-Mg-Si alloys are capable of achieving a highly attractive combination of moderate to high strength (sometimes > 350 MPa UTS), high ductility (>20% elongation), and excellent corrosion resistance, extrudability, weldability, and surface finish. 350 MPa UTS), high ductility (>20% elongation), and excellent corrosion resistance, extrudability, weldability, and surface finish.20% elongation), and excellent corrosion resistance, extrudability, weldability, and surface finish. The largest unknown in the world of 6000 series alloys today is a result of natural aging (NA) prior to artificial aging (AA), and the rather mysterious impacts on strengthening precipitation and hardenability that are produced. The origins of these impacts involve complex interactions between solute atoms, solute-clusters, and vacancies, which ultimately influence the kinetics and thermodynamics of precipitation. Although this has been the topic of extensive research in recent years, the actual mechanisms responsible are still very controversial. This dissertation will focus on the effects of prior natural aging on artificial age hardening response under a wide range of compositional and heat treatment conditions. Ultimately it will be shown that the behavior of naturally aged solute-clusters during artificial aging is dependent on alloy composition, and furthermore that these clusters are directly responsible for the changes in strengthening precipitation and performance. General background to the topic and an overview of the experimental methods are described in Chapters 1-2. The most important chapters of this dissertation are Chapters 3-4, which focus on the influence of prior NA in high strength Al-Mg-Si alloys after a water quench from the solutionization temperature. In Chapter 3, a compositional (Mg/Si) dependence of the NA effect is identified, and proposed to due to a corresponding dependence of NA cluster stability during artificial aging. In Chapter 4, the actions of NA clusters at AA temperatures are investigated with atom probe tomography, and the relative thermal stabilities suggested in Chapter 3 are proven. The rest of the dissertation includes studies focused on the NA effect under different compositional and heat-treatment conditions, using the previous cluster thermal stability findings to aid in analysis (Chapter 5). Mechanical property characterization of key experimental conditions is performed in Chapter 6, and good agreement with the previous results is found. Finally, key conclusions, implications, and suggested future work is summarized in Chapter 7 & 8.
Download or read book Light Metals 2012 written by Carlos Suarez and published by Springer. This book was released on 2016-12-23 with total page 1314 pages. Available in PDF, EPUB and Kindle. Book excerpt: An update of the definitive annual reference source in the field of aluminum production and related light metals technologies, a great mix of materials science and practical, applied technology surrounding aluminum, bauxite, aluminum reduction, rolling, casting, and production.
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
Download or read book Structural Materials and Processes in Transportation written by Dirk Lehmhus and published by John Wiley & Sons. This book was released on 2013-08-07 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lightness, efficiency, durability and economic as well as ecological viability are key attributes required from materials today. In the transport industry, the performance needs are felt exceptionally strongly. This handbook and ready reference covers the use of structural materials throughout this industry, particularly for the road, air and rail sectors. A strong focus is placed on the latest developments in materials engineering. The authors present new insights and trends, providing firsthand information from the perspective of universities, Fraunhofer and independent research institutes, aerospace and automotive companies and suppliers. Arranged into parts to aid the readers in finding the information relevant to their needs: * Metals * Polymers * Composites * Cellular Materials * Modeling and Simulation * Higher Level Trends
Download or read book Aluminum Lithium Alloys written by N. Eswara Prasad and published by Elsevier Inc. Chapters. This book was released on 2013-09-20 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The low cycle fatigue (LCF) and high cycle fatigue (HCF) properties of Al–Li alloys are influenced by alloy composition, microstructural characteristics, tensile stretching prior to artificial aging, and crystallographic texture. In general the fatigue properties, notably the notched HCF resistances, of Al–Li alloys are similar to those of conventional aerospace aluminium alloys. Alloy development programs on newer Al–Li alloys aim to study further the effects of minor alloying additions (rare earths, beryllium, silver and TiB); various thermomechanical treatments; alloy microstructure, notably crystallographic texture and grain size; and the fatigue load history and environment on the mechanical behavior, including the fatigue properties. It is important to note that the occurrence of bilinearity in LCF life-dependence on strain amplitude in most Al–Li alloys engenders the overestimation of the LCF lives in both the hypo-transition (lower strain amplitudes; longer fatigue lives) and hyper-transition (higher strain amplitudes; shorter fatigue lives) regions if the lives are estimated by extrapolation from either of these regions. Further, in cases such as in Al-Li alloys where there are large differences in strength-based (Basquin-like) and plastic strain – based (Coffin-Manson) power-law relationships, it is appropriate to develop an alloy design philosophy based on either plastic strain energy per cycle (Halford-Morrow) or fatigue toughness (total plastic strain energy to fracture). All of these aspects are discussed in detail in this chapter.
Download or read book Aluminum Alloys Contemporary Research and Applications written by A. K. Vasudevan and published by Elsevier. This book was released on 2012-12-02 with total page 727 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the structure and properties of the current and potential aluminum alloys in terms of their structure (and structural transformations by new processing methods) and the relationship between structure and mechanical and other properties. The alternative materials that challenge aluminum are considered as well, since the challenge of new competitive materials is a strong influence on innovation. The book bridges the gap between current scientific understanding and engineering practice. It is an up-to-date reference that will be of use to researchers and advanced students in metallurgy and materials engineering.
Download or read book Welding of Aluminum and Aluminum Alloys written by R. P. Meister and published by . This book was released on 1967 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to summarize the present state of aluminum-welding technology. The major topics covered are: Basic metallurgy of various heat-treatable and non-heat-treatable alloy classes; welding processes used for joining aluminum with emphasis on newer processes and procedures which are considered important in defense metals industries; welding characteristics of various alloys; comparison of tensile properties, cracking tendencies, notch toughness, and stress-corrosion characteristics of various weldments; dissimilar metal welds; and causes of porosity and cracking of aluminum welds and the effect of porosity on weld strength. (Author).
Download or read book New Materials for Next Generation Commercial Transports written by Committee on New Materials for Advanced Civil Aircraft and published by National Academies Press. This book was released on 1996-03-29 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major objective of this book was to identify issues related to the introduction of new materials and the effects that advanced materials will have on the durability and technical risk of future civil aircraft throughout their service life. The committee investigated the new materials and structural concepts that are likely to be incorporated into next generation commercial aircraft and the factors influencing application decisions. Based on these predictions, the committee attempted to identify the design, characterization, monitoring, and maintenance issues that are critical for the introduction of advanced materials and structural concepts into future aircraft.
Download or read book Age hardenable Aluminium Alloys written by István Kovács and published by . This book was released on 1987 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents more than 60 papers on various topics of current interest, concerning the development of new types of alloys, trace elements, analytical techniques, the physics of the decomposition process, dislocation structure and technological applications.
Download or read book Corrosion of Aluminium written by Christian Vargel and published by Elsevier. This book was released on 2004-10-02 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of Aluminium highlights the practical and general aspects of the corrosion of aluminium alloys with many illustrations and references. In addition to that, the first chapter allows the reader who is not very familiar with aluminium to understand the metallurgical, chemical and physical features of the aluminium alloys. The author Christian Vargel, has adopted a practitioner approach, based on the expertise and experience gained from a 40 year career in aluminium corrosion This approach is most suitable for assessing the corrosion resistance of aluminium- an assessment which is one of the main conditions for the development of many uses of aluminium in transport, construction, power transmission etc. - 600 bibliographic references provide a comprehensive guide to over 100 years of related study - Providing practical applications to the reader across many industries - Accessible to both the beginner and the expert
Download or read book Simulation of Natural Aging in Al Mg Si Alloys written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Performance Structural Materials written by Yafang Han and published by Springer. This book was released on 2018-04-17 with total page 1035 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume gathers selected papers presented at the Chinese Materials Conference 2017 (CMC2017), held in Yinchuan City, Ningxia, China, on July 06-12, 2017. This book covers a wide range of powder metallurgy, high performance aluminum alloys, high performance titanium & titanium alloys, superalloys, metal matrix composite, space materials science and technology, rare metals, refractory metals and their applications, advanced ceramics materials, nanostructured metals and alloys. The Chinese Materials Conference (CMC) is the most important serial conference of the Chinese Materials Research Society (C-MRS) and has been held each year since the early 1990s. The 2017 installment included 37 Symposia covering four fields: Advances in energy and environmental materials; High performance structural materials; Fundamental research on materials; and Advanced functional materials. More than 5500 participants attended the congress, and the organizers received more than 700 technical papers. Based on the recommendations of symposium organizers and after peer reviewing, 490 papers have been included in the present proceedings, which showcase the latest original research results in the field of materials, achieved by more than 300 research groups at various universities and research institutes.
Download or read book Die Casting Engineer written by and published by . This book was released on 2004 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
