Download or read book Development of Super high Strength Aluminum Alloys for Cryogenic Applications written by and published by . This book was released on 2003 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aluminium Alloys written by Giulio Timelli and published by BoD – Books on Demand. This book was released on 2022-07-20 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminium alloys are among the most interesting materials being adopted for weight reduction and recycling benefits. The increasing importance of aluminium alloys over the years is due to their widespread use and applications in automotive, aerospace, food handling, building, heat exchange, and electrical transmission industries. Their high strength/weight ratio makes aluminium alloys useful for applications where simultaneous high strength and lightness are needed.This book provides a comprehensive review of the design and development of innovative aluminium alloys and composites. Chapters discuss manufacturing processes and applications and are heavily illustrated to make the concepts clear.

Download or read book Development of Aluminum Base Alloys section i written by J. P Lyle (Jr) and published by . This book was released on 1966 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is possible to fabricate high quality, high strength hot-worked products of heat treatable aluminum alloys from prealloyed atomized powders. Preliminary and limited testing indicates that extrusions made this way with appropriate heat treatments have the following combination of properties: (1) Tensile and yield strengths 12-36% higher than conventional 7075-T73 combined with resistance to stress corrosion cracking (SCC) equal to 7075-T73, (2) Tensile and yield strengths 11-25% higher than conventional 7178-T6 combined with resistance to SCC equal resistance to SCC equal to 7178-T6, (3) Tensile and yield strengths equal to conventional 7178-T6, combined with better resistance to SCC than 7178-T6, (4) Tensile strengths of 125,000 psi and yield strength: Density ratios of 1.16 million inches, (5) High resistance to exfoliation, (6) Tensile and yield strengths higher than X2020-T6 from -112 to at least 212 F and higher than 7075-T6 from -112 to at least 400 F, (7) Fatigue strengths (smooth and notched specimens) at least as high as 7075-76, (8) Toughness in strongest tempers inferior to 7075-T6 and 7178-T6, but toughness may be made competitive by more extensive aging, and (9) Poor fusion weldability (low strength and ductility) due to porosity.

Download or read book Advances in Cryogenic Engineering written by K.D. Timmerhaus and published by Springer Science & Business Media. This book was released on 2013-12-18 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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).

Download or read book Integrated Product and Process Design and Development written by Edward B. Magrab and published by CRC Press. This book was released on 2009-07-28 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of a bestseller, this book discusses an integrated product and process design that has been successfully used to conceptualize, design, and rapidly product competitively-priced quality products. It examines the overlapping, interacting, and iterative nature of the engineering aspects that impact the product realization process. A detailed introduction to the creation of high quality products, the new edition explores the role of innovation, requirements engineering, smart materials, different rapid prototyping methods, and life-cycle cost determination, to name just a few. The book delineates proven methods that have been used successfully to create products.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 804 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.

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:

Download or read book Metallic Materials with High Structural Efficiency written by Oleg N. Senkov and published by Springer Science & Business Media. This book was released on 2004-06-29 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the fall of 1998, Prof. Sergey Firstov invited me to the Frantcevych Institute for Problems of Materials Science (IPMS) in Kyiv, Ukraine to discuss possible collaborations in the area of advanced metals research. During this visit, a strong mutual interest was evident in a broad range of structural metals technologies, and a quick friendship was established. Countless subsequent emails and a reciprocal visit to the U. S Air Force Research Laboratory by Prof. Firstov and a team of scientists from IPMS ensued to discuss and detail a broad collaboration in the area of structural metals. Two years after the initial visit, a major investment by the U. S. Air Force Office of Scientific Research (AFOSR) was established to pursue the technologies defined by these interactions. The annual reviews of the AFOSR Ukrainian Metals Initiative were held in late May, a most beautiful time in Kyiv when the lilacs are in bright display and the air is scented with the smell of falling blossoms from the chestnut trees that line the major streets and many parks. The sunny days and mild evenings provide a welcome break from winter, and on weekend evenings festive crowds spill onto the Khreshchatyk, Kyiv’s downtown boulevard, to listen to street musicians, watch jugglers and comedians, or simply to celebrate with friends. The annual reviews featured long days of intensive discussion of technical progress, followed in the evenings by the warm hospitality of the Ukrainian hosts.

Download or read book High Strength Cast Aluminum Alloy Development written by Edward A. Drushitz and published by . This book was released on 2013 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this research was to understand how chemistry and processing affect the resulting microstructure and mechanical properties of high strength cast aluminum alloys. Two alloy systems were investigated including the Al-Cu-Ag and the Al-Zn-Mg-Cu systems. Processing variables included solidification under pressure (SUP) and heat treatment. This research determined the range in properties that can be achieved in BAC 100TM (Al-Cu micro-alloyed with Ag, Mn, Zr, and V) and generated sufficient property data for design purposes. Tensile, stress corrosion cracking, and fatigue testing were performed. CuAl2 and Al-Cu-Fe-Mn intermetallics were identified as the ductility limiting flaws. A solution treatment of 75 hours or longer was needed to dissolve most of the intermetallic CuAl2. The Al-Cu-Fe-Mn intermetallic was unaffected by heat treatment. These results indicate that faster cooling rates, a reduction in copper concentration and a reduction in iron concentration might increase the ductility of the alloy by decreasing the size and amount of the intermetallics that form during solidification. Six experimental Al-Zn-Mg-Cu series alloys were produced. Zinc concentrations of 8 and 12wt% and Zn/Mg ratios of 1.5 to 5.5 were tested. Copper was held constant at 0.9%. Heat treating of the alloys was optimized for maximum hardness. Al-Zn-Mg-Cu samples were solution treated at 441°C (826°F) for 4 hours before ramping to 460°C (860°F) for 75 hours and then aged at 120°C (248°F) for 75 hours. X-ray diffraction showed that the age hardening precipitates in most of these alloys was the T phase (Mg32Zn31.9Al17.1). Tensile testing of the alloys showed that the best mechanical properties were obtained in the lowest alloy condition. Chilled Al-8.2Zn-1.4Mg-0.9Cu solidified under pressure resulted in an alloy with a yield strength of 468MPa (68ksi), tensile strength of 525MPa (76ksi) and an elongation of 9%.

Download or read book Fundamental Investigations of Plasticity in High Strength Nanostructured Aluminum Alloys written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cryomilled aluminum alloys are being developed for aerospace applications. These high-strength aluminum alloys are currently targeted for low-temperature rocket applications. This research focused on the fundamental strengthening mechanisms in these alloys. The primary sources of strengthening in cryomilled aluminum alloys are dispersion of nanocrystalline particles and ultrafine grain size that form during the cryomilling stage. Optimized thermo-mechanical processing of cryomilled powder results in an ultrafine grain size material with nanocrystalline particles. This study investigated the temperature dependence of strength and ductility in these alloys. The theoretical models predict strengthening at low temperatures and decrease of flow stress with decreasing grain size because of diffusional flow and grain boundary sliding at elevated temperatures. The results from this study show discrepancies with theoretical models. Significant work hardening was observed at room temperature in both Al-Ti-Cu and Al-Mg alloys. The strain hardening exponents suggest contributions from both direct and indirect work hardening mechanisms. At elevated temperatures, the stress-strain rate data for Al-Mg alloys can be best described by a power law constitutive relationship with a stress exponent of 5 and threshold stress. However, the activation energy is very high even after compensating for threshold approach. This indicates that dissolution of Al3Mg2 precipitates influence the deformation kinetics. (6 figures, 8 refs.).

Download or read book Reactor Materials written by and published by . This book was released on 1968 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Literature Survey Weldable High Strength Aluminum Alloys written by William George Fricke and published by . This book was released on 1963 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of High strength Aluminum Alloys with Improved Stress Corrosion Resistance phase 2 written by J. Corey McMillan and published by . This book was released on 1968 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Cryogenic Engineering written by Klaus D. Timmerhaus and published by . This book was released on 1975 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fracture Resistance of Aluminum Alloys written by John Gilbert Kaufman and published by ASM International. This book was released on 2001-01-01 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Kaufman prevents this summary of data on the fracture characteristics of aluminum alloys, broadly based on a publication by Alcoa in 1964, Fracture Characteristics of Aluminum Alloys. Coverage includes tensile properties as indicators of fracture behavior; notched-bar impact and related tests for toughness; notch toughness and sensitivity; tear resistance; fracture toughness; the interrelation of fracture characteristics; toughness at subzero and elevated temperatures; subcritical crack growth; and metallurgical considerations in fracture resistance. Most of the data is presented in only the English/engineering units, contrary to normal ASM International and Aluminum Association, Inc. policies. The author's credentials are not stated. c. Book News Inc

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.