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Book Development of High strength Aluminum Alloys with Improved Stress corrosion Resistance

Download or read book Development of High strength Aluminum Alloys with Improved Stress corrosion Resistance written by J. Corey McMillan and published by . This book was released on 1967 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the program is to develop a stress corrosion resistant high strength aluminum alloy through addition of minor elements and variations in heat treatment. In Phase I, fifteen special chemistry alloys based on the 7075 composition were prepared in plate form with additions of silver, boron, cerium, yttrium and zirconium. The materials evaluation consisted of metallographic and aging studies, stress corrosion testing and determination of mechanical and fracture properties. The silver bearing alloys, while not immune, were the only alloys to show increased resistance to stress corrosion cracking in the T6 temper. Overaging treatments improved the stress corrosion resistance of all alloy combinations tested. Mechanical property evaluations and transmission electron microscopy studies indicate that silver additions retard the rate of overaging and promote a finer dispersion of M' precipitate, which allow these materials to attain stress corrosion resistance without large decreases in tensile strength. However, the increased quench sensitivity of silver-bearing alloys may limit this strength advantage to thinner sections unless other changes are made in chemical composition. On the basis of stress corrosion, fatigue, fracture toughness, and strength requirements, five step-aged special chemistry alloys are proposed for Phase II testing. (Author).

Book Aluminum Alloys Contemporary Research and Applications

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.

Book New Materials for Next Generation Commercial Transports

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.

Book Development of a High strength Stress Corrosion Resistant Aluminum Aircraft Alloy

Download or read book Development of a High strength Stress Corrosion Resistant Aluminum Aircraft Alloy written by J. T. STALEY and published by . This book was released on 1971 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Investigation to Develop a High Strength Stress Corrosion Resistant Naval Aircraft Aluminum Alloy

Download or read book Investigation to Develop a High Strength Stress Corrosion Resistant Naval Aircraft Aluminum Alloy written by J. T. Staley and published by . This book was released on 1970 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents the results of an evaluation of three tempers of commercially fabricated alloy MA15 plate in 1 in. to 6 in. thickness. Compared at equal strengths, MA15 developed higher resistance to stress-corrosion cracking, greater resistance to exfoliation corrosion, higher toughness, and better fatigue performance than established commercial aluminum alloys. Compared at equal resistance to stress-corrosion cracking, MAl5 developed substantially higher strength than established commercial aluminum alloys. Field testing of this material is recommended. (Author).

Book Stress corrosion Cracking of Aluminum Alloys

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).

Book Exploratory Development of High strength Stress corrosion Resistant Aluminum Alloys Usable in Thick Section Applications

Download or read book Exploratory Development of High strength Stress corrosion Resistant Aluminum Alloys Usable in Thick Section Applications written by James T. Staley and published by . This book was released on 1969 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Exploratory Development of High Strength Stress Corrosion Resistant Aluminum Alloy for Use in Thick Section Applications

Download or read book Exploratory Development of High Strength Stress Corrosion Resistant Aluminum Alloy for Use in Thick Section Applications written by James T. Staley and published by . This book was released on 1970 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: An alloy has been developed which exhibits a good resistance to stress-corrosion cracking at 25 ksi or higher stress in the short-transverse direction based on 30 days exposure in the 3.5% NaCl alternate immersion test. Estimated minimum strength of three-inch thick plate exceeds the guaranteed minimum strength of the closest competing aluminum alloy by 3 ksi and the advantage increases with increasing thickness. Eccentricities in the results of 84 day alternate immersion tests and lack of data regarding performance of alloys of this type in natural environments for longer than 10 months, however, indicate that caution must be used in extrapolating the results of the accelerated tests to predict service performance. (Author).

Book Stress Corrosion Resistance of a New High Strength Aluminum Alloy Developed for Use in Thick Sections

Download or read book Stress Corrosion Resistance of a New High Strength Aluminum Alloy Developed for Use in Thick Sections written by Irving S. Shaffer and published by . This book was released on 1971 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the investigation was to evaluate the stress corrosion behavior of a new high strength aluminum alloy plate in the T6+35 hours at 325F temper. Using smooth specimens, stress corrosion tests were conducted in two different laboratory environments. No evidence of stress corrosion cracking was found in any of the test specimens. Exfoliation tests were also conducted on stepped panels which exposed different interior planes through the thickness. The material displayed excellent resistance to exfoliation corrosion. (Author).

Book Philosophical Transactions of the Royal Society of London

Download or read book Philosophical Transactions of the Royal Society of London written by and published by . This book was released on 1976 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Advanced Welding Systems

Download or read book Advanced Welding Systems written by Jean Cornu and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: HE ORIGINS of welding are buried in the depths of antiquity, T commencing with the forging of native gold and copper, progressing in the bronze age with the braze welding of castings, but not developing greatly until relatively recently. It has been this century, and the latter half in particular, that welding has developed to the stage where there are more than 100 variants. Furthermore, joining by welding has become such an efficient technique that much of our modem way oflife would not be possible without it. The giant oil rigs, built to withstand the rigours of the North Sea, the minute wire connectors in the computer and transistor, and the automobile and truck, could not exist were it not for welding processes. Originally a uniquely manual process, the needs of industry have this century required welding techniques which could be mechanised. Some processes, such as friction welding, were readily mechanised but the most flexible and adaptable fusion processes awaited develop ments which allowed a continuous wire to be rapidly fed into the fusion zone. These processes, such as MAG and submerged arc, rapidly gave rise to machines for welding, with many appearing before the Second World War.

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.