Download or read book Investigation of the Negative and Positive Effects of Natural Aging on Artificial Aging Response in Al Mg Si Alloys written by and published by . This book was released on 2014 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of the Negative and Positive Effect of Natural Aging on Artificial Aging Response in Al Mg Si Alloys written by Yong Yan and published by . This book was released on 2014 with total page 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 Fundamentals of Aluminium Metallurgy written by Roger Lumley and published by Woodhead Publishing. This book was released on 2018-05-22 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Aluminium Metallurgy: Recent Advances updates the very successful book Fundamentals of Aluminium Metallurgy. As the technologies related to casting and forming of aluminum components are rapidly improving, with new technologies generating alternative manufacturing methods that improve competitiveness, this book is a timely resource. Sections provide an overview of recent research breakthroughs, methods and techniques of advanced manufacture, including additive manufacturing and 3D printing, a comprehensive discussion of the status of metalcasting technologies, including sand casting, permanent mold casting, pressure diecastings and investment casting, and recent information on advanced wrought alloy development, including automotive bodysheet materials, amorphous glassy materials, and more. Target readership for the book includes PhD students and academics, the casting industry, and those interested in new industrial opportunities and advanced products. - Includes detailed and specific information on the processing of aluminum alloys, including additive manufacturing and advanced casting techniques - Written for a broad ranging readership, from academics, to those in the industry who need to know about the latest techniques for working with aluminum - Comprehensive, up-to-date coverage, with the most recent advances in the industry

Download or read book Light Metals 2016 written by The Minerals, Metals & Materials Society (TMS) and published by John Wiley & Sons. This book was released on 2016-02-09 with total page 1083 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2016 collection will include papers from the following symposia: Alumina and Bauxite Aluminum Alloys, Processing, and Characterization Aluminum Reduction Technology Cast Shop Technology Electrode Technology Strip Casting

Download or read book Light Metals 2016 written by Edward Williams and published by Springer. This book was released on 2016-12-20 with total page 983 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Light Metals symposia are a key part of the TMS Annual Meeting & Exhibition, presenting the most recent developments, discoveries, and practices in primary aluminum science and technology. Publishing the proceedings from these important symposia, the Light Metals volume has become the definitive reference in the field of aluminum production and related light metal technologies. The 2016 collection includes papers from the following symposia: 1.Alumina and Bauxite 2.Aluminum Alloys, Processing, and Characterization 3.Aluminum Reduction Technology 4.Cast Shop Technology 5.Electrode Technology 6.Strip Casting

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 Optimisation of the Heat Treatment Cycles of CSIR Semi solid Metal Processed Al 7Si Mg Alloys A356 7 written by Heinrich Moller and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional casting alloys Al-7Si-Mg A356/7 contain between 6.5 and 7.5% Si, together with 0.25-0.7% Mg and are used for critical castings in the automotive and aerospace industries. These alloys are also the most popular alloys used for semi-solid metal (SSM) forming due to good castability and fluidity imparted by the large volumes of the Al-Si eutectic. Despite their industrial importance, there is a lack of detailed research work revealing precipitate micro- and nanostructural evolution during aging of these alloys compared with the Al-Mg-Si 6000 series wrought alloys. This study characterises the heat treatment response of SSM-processed Al-7Si-Mg alloys in comparison with conventionally liquid cast alloys (investment casting and gravity die casting). It is shown that, provided that the maximum quantity of the alloy's Mg is placed into solid solution during solution treatment, and that the alloy's Fe content is within specification, the response to age hardening of Al-7Si-Mg alloys is independent of the processing technique used. The nanostructural evolution of Al- 7Si-Mg alloys after artificial aging with and without natural pre-aging has been characterized using transmission electron microscopy and atom probe tomography and correlated with hardness and mechanical tensile properties. The number densities and Mg:Si ratios of solute clusters, GP zones and ;?-needles were determined. The heat treatment response of SSM-processed casting alloys A356/7 alloys are also compared with SSM-processed Al-Mg-Si 6000 series wrought alloys, with the advantage of having similar globular microstructures. The high Si-content of the casting alloys compared to the wrought alloys offers several advantages, including a faster artificial aging response (shorter T6 aging cycles), higher strength for comparable Mg contents and less sensitivity to prior natural aging on peak strength. Finally, an age-hardening model was developed for the Al-7Si-Mg alloys, including a method of incorporating the effects of changes in Mg-content on the aging curves.

Download or read book Corrosion Resistance of Aluminum and Magnesium Alloys written by Edward Ghali and published by John Wiley & Sons. This book was released on 2010-05-05 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt: Valuable information on corrosion fundamentals and applications of aluminum and magnesium Aluminum and magnesium alloys are receiving increased attention due to their light weight, abundance, and resistance to corrosion. In particular, when used in automobile manufacturing, these alloys promise reduced car weights, lower fuel consumption, and resulting environmental benefits. Meeting the need for a single source on this subject, Corrosion Resistance of Aluminum and Magnesium Alloys gives scientists, engineers, and students a one-stop reference for understanding both the corrosion fundamentals and applications relevant to these important light metals. Written by a world leader in the field, the text considers corrosion phenomena for the two metals in a systematic and parallel fashion. The coverage includes: The essentials of corrosion for aqueous, high temperature corrosion, and active-passive behavior of aluminum and magnesium alloys The performance and corrosion forms of aluminum alloys The performance and corrosion forms of magnesium alloys Corrosion prevention methods such as coatings for aluminum and magnesium Electrochemical methods of corrosion investigation and their application to aluminum and magnesium alloys Offering case studies and detailed references, Corrosion Resistance of Aluminum and Magnesium Alloys provides an essential, up-to-date resource for graduate-level study, as well as a working reference for professionals using aluminum, magnesium, and their alloys.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1971 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Light Metals 2020 written by Alan Tomsett and published by Springer Nature. This book was released on 2020-01-28 with total page 1385 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Light Metals symposia at the TMS Annual Meeting & Exhibition present the most recent developments, discoveries, and practices in primary aluminum science and technology. The annual Light Metals volume has become the definitive reference in the field of aluminum production and related light metal technologies. The 2020 collection includes papers from the following symposia: • Alumina and Bauxite• Aluminum Alloys, Processing and Characterization• Aluminum Reduction Technology• Cast Shop Technology• Cast Shop Technology: Recycling and Sustainability Joint Session• Electrode Technology for Aluminum Production

Download or read book Microscopic Aspects of Ageing in Al Mg Si Alloys written by Mazen Madanat and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aluminium Alloys 2006 ICAA10 written by Warren J. Poole and published by Trans Tech Publications Ltd. This book was released on 2006-07-15 with total page 2100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world production of primary and recycled aluminum continues to increase and, over the past twenty years, has risen from ~15 Mt/y in 1985 to ~32 Mt/y in 2005. The main consumers are transportation, beverage and other packaging, and building construction. The global primary aluminum production has been growing by about 2-3% per year. However, growth rates over the last decade have been much higher. In particular, during the past five years, China has played a critical role in aluminum production and has gone through a dramatic period of growth.

Download or read book Effects of Ageing on Internal Friction of Al mg si Alloys written by T. YAMANE and published by . This book was released on 1969 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Be and Na on Precipitation Process in Al Mg sub 2 Si Alloys Studies on Aging Phenomena of Al Alloys 2nd Report written by S. Nishi and published by . This book was released on with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.