Download or read book Tear Resistance and Stress Relaxation Behavior of High strength AA7075 T6 Aluminum Alloy Sheet at Warm Temperatures Near 200 C written by Daniel Edward Nikolai and published by . This book was released on 2020 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of lightweight metals is of great interest to the automotive industry for improving vehicle efficiency. The automotive industry is particularly interested in lightweight metals with high strength-to-density ratios that can perform well in crash scenarios. To this end, high-strength aluminum alloys are investigated for body-in-white applications. Currently, 6xxx series aluminum alloys are the most commonly used aluminum materials for the body-in-white. AA7075-T6 offers comparable density to and significantly higher strength than the 6xxx series aluminum alloys. However, AA7075-T6 demonstrates low ductility and formability at room temperature, which are barriers to producing and mechanically fastening components for the body-in-white. Prior investigations by Rader et. al. demonstrated that the ductility of AA7075-T6 sheet is approximately doubled at warm temperatures near 200 °C, allowing it to be stamped to complex geometries. However, joining of AA7075-T6 sheet remains a significant challenge. The present study investigates the material behaviors necessary to determine the potential for joining of AA7075-T6 sheet at warm temperatures by self-piercing riveting. Self-piercing riveting is commonly used with the lower strength 6xxx series aluminum alloys in the automotive industry. Tear-resistance and stress-relaxation experiments are conducted to evaluate the potential for successfully implementing of self-pierce riveting in AA7075-T6 sheet at warm temperatures. Tear energy measurements at warm temperatures appropriate for retrogression heat treatments in AA7075-T6 are compared to measurements at room temperature. A four-fold increase in the tear energy of AA7075-T6 at warm temperatures suggests a high possibility for success with self-piercing riveting at these temperatures. Rapid stress relaxation of up to 45% of the flow stress produced during deformation at warm temperatures indicates a potentially significant reduction in residual stresses after deformation, which should reduce spring-back after forming and reduce the chance of delayed cracking in AA7075-T6 sheet after the application of a self-piercing rivet. These experimental results support the potential to successfully apply a self-piercing rivet to AA7075-T6 sheet at a warm temperature while simultaneously retrogressing the material. Because a subsequent reaging heat treatment is known to restore full strength following a retrogression heat treatment, the retrogression riveting and reaging process is proposed as a method to successfully join AA7075-T6 sheet material while retaining the full strength of the T6 condition
Download or read book Light Metals 2024 written by Samuel Wagstaff and published by Springer Nature. This book was released on 2024 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zusammenfassung: 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 2024 collection includes contributions from the following symposia: · Alumina & Bauxite · Aluminum Alloys: Development and Manufacturing · Aluminum Reduction Technology · Electrode Technology for Aluminum Production · Melt Processing, Casting and Recycling · Scandium Extraction and Use in Aluminum Alloys
Download or read book Compressive and Tensile Creep of 7075 T6 and 2024 T3 Aluminum alloy Sheet written by George J. Heimerl and published by . This book was released on 1959 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Tensile Behavior of AA6013 at Room Temperature and 240 C written by Dominic Gianni Fascitelli and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Automotive manufacturers are pursuing technologies, such as lightweighting, that improve vehicle fuel-efficiency and reduce emissions. High-strength aluminum alloys might provide performance equal to the current ultra-high-strength steels while decreasing vehicle weight. High-strength 6xxx-series aluminum alloys, such as AA6013, are candidates for lightweighting structural components of vehicles because of their high strength-to-weight ratios compared to steel. In the peak-aged condition, these alloys often lack the ductility necessary to form complex part geometries at room temperature. Forming at elevated temperatures increases the ductility but can reduce strength. Retrogression forming and reaging (RFRA) is a relatively new technology for warm forming parts in high-strength aluminum alloys and then recovering strength to equal the peak-aged condition. Previous studies on aluminum alloy AA6013 performed by Rader et al. demonstrated a significant response to retrogression and reaging. New data for AA6013 are presented from tension tests at room temperature and 240 °C, an appropriate temperature for retrogression of this alloy. The effects of different heat treatments on room temperature properties are investigated. The effects of temperature and time at temperature on plastic deformation are investigated using experiments at 240 °C. Retrogression from the T6 temper reduced room-temperature strength by 3.5%, but subsequent reaging restored strength to within 2% of the original T6 temper. At 240 °C, the yield stress was 25 to 30% lower and elongations after rupture were 42% higher than at room temperature for the T6 temper. Stress relaxation at 240 °C decreased stress by 32 to 43% at a fixed elongation within approximately three minutes. These results suggest that RFRA could be viable for forming complex components in AA6013-T6
Download or read book Investigation of the Compressive Strength and Creep of 7075 T6 Aluminum alloy Plates at Elevated Temperatures written by William D. Deveikis and published by . This book was released on 1957 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elevated-temperature compressive-strength test results from room temperature to 600 degrees F and creep test results from 350 degrees F to 500 degrees F are presented for V-groove edge-supported plates of 7075-T6 aluminum alloy. The test data are compared with calculations obtained from procedures for estimating maximum strength from material stress-strain curves and creep-failure stresses from isochronous stress-strain curves. The strength and creep results from this investigation are also compared with similar results from 2024-T3 aluminum-alloy plates.
Download or read book Elevated temperature Compressive Stress strain Data for 24S T3 Aluminum alloy Sheet and Comparisons with Extruded 75S T6 Aluminum Alloy written by William M. Roberts and published by . This book was released on 1949 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented of compressive stress-strain tests of 24S-T3 aluminum-alloy sheet at stabilized elevated temperatures up to 700 degrees F, exposure times of 1/2 to 2 hours, and strain rates of 0.002 to 0.006 per minute. Some general comparisons with extruded 75S-T6 aluminum alloy are included.
Download or read book Room Temperature Tensile Properties of Large 7075 T6 and 7075 T73 Aluminum alloy Forgings written by D. P. Moon and published by . This book was released on 1970 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Room-temperature tensile properties were determined for large 7075-T6 and 7075-T73 aluminum-alloy forgings. Forging sizes ranged from about 1.5 to 15 inches (short-transverse direction) for production forgings and up to 20 inches for step forgings. Heat-treated thickness was 0.75 to 1.000 inch for the T6 temper but ranged up to 10 inches for the T73 temper. Regression coefficients and standard d deviations are presented for three properties (TUS, TYS, and elongation) in each of three test directions. In addition, average values and two statistical minima are tabulated for each property and test direction at each of several discrete sizes, and a comparison is made with the corresponding requirements of Specification MIL-A-22771C(ASG). (Author).
Download or read book Fatigue Behavior and Residual Stress Stability of Deep rolled Aluminium Alloys AA5083 and AA6110 at Elevated Temperature written by Patiphan Juijerm and published by kassel university press GmbH. This book was released on 2007 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elevated Temperature Properties of 7075 T6 Aluminum Alloy written by D. R. Adolphson and published by . This book was released on 1958 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technical memorandum is a compilation of available elevated temperature data for 7075-T6 aluminum alloy. Included are mechanical and thermal data. Besides the variable of temperature, the effects of time at temperature, rate of loading, and rate of heating are included.
Download or read book Compressive Stress strain Properties of 7075 T6 Aluminum alloy Sheet at Elevated Temperatures written by Eldon E. Mathauser and published by . This book was released on 1956 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compressive stress-strain test results for 7075-T6 aluminum-alloy sheet are presented for temperatures ranging from room temperature to 700 degrees F and for exposure times from 0.1 to 100 hours. All specimens were loaded parallel to the rolling direction of the sheet and tested at a nominal strain rate of 0.002 per minute. Stress-strain curves are presented for each temperature and exposure time investigated, and significant design data obtained from the curves (compressive yield stress, Young's modulus, secant and tangent moduli, and two stresses useful for determining the maximum compressive strength of plates) are presented in graphical and tabular form. A time-temperature parameter derived from rate-process theory is used to present the compressive yield stresses as a single master curve.
Download or read book Tensile Behavior of Boron epoxy reinforced 7075 T6 Aluminum Alloy at Elevated Temperatures written by Daniel J. Chwirut and published by . This book was released on 1974 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tensile Behavior of Boron Epoxy Reinforced 7075 T6 Aluminum Alloy at Elevated Temperatures Classic Reprint written by Daniel J. Chwirut and published by Forgotten Books. This book was released on 2017-11-18 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Tensile Behavior of Boron/Epoxy-Reinforced 7075-T6 Aluminum Alloy at Elevated Temperatures Key words: Aluminum alloy; boron/epoxy; cc-cure; composite materials; fabrication process; load-deformation characteristics; residual stress. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Tensile Properties of 7075 T6 and 2024 T3 Aluminum alloy Sheet Heated at Uniform Temperature Rates Under Constant Load written by George J. Heimerl and published by . This book was released on 1955 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented of tests to determine the effect of heating at uniform temperature rates from 0.2 degrees to 100 degrees F. per second on the tensile properties of 7075-T6 d(75s-T6) and 2024-T3 (24s-T3) aluminum-alloy sheet under constant-load conditions. Yield and rupture stresses, obtained under rapid-heating conditions, are compared with results of elevated-temperature stress-strain tests for 1/2-hour exposure. Master yield-and-rupture-stress curves based on linear temperature-rate parameter are presented with which yield and rupture stresses or temperatures may be predicted for these materials for temperature rates from 0.2 to 100 degrees F per second. A description of the test equipment is included.
Download or read book Tensile Behavior of Boron epoxy reinforced 7075 T6 Aluminum Alloy at Elevated Temperatures with List of References written by and published by . This book was released on 1974 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rapid Heating and Loading of 7075 T6 Aluminum Alloy Sheet written by and published by . This book was released on 1970 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the report is to make available to the design engineer tensile property data on 7075-T6 aluminum, in the longitudinal and transverse directions, under conditions of rapid heating and loading. The tensile property data reported are: ultimate tensile stress, ultimate yield stress (at 0.2- percent offset), elastic modulus, percent total elongation, and percent uniform elongation. These tensile properties were determined at strain rates of 0.0047, 0.0201, and 0.0266 in./in./sec and at temperatures from room temperature (78F) to 700F at 100 degree intervals, excluding 100 and 200F. The time required to reach test temperature was, in most cases, less than 10 seconds. Primary consideration is given to ultimate tensile and yield properties. Other tensile property data reported are secondary and should be used for design criteria only after consideration has been given to the methods used for obtaining and reducing these data. The strength properties of the test material increased with an increase in strain rate from 300 to 700F with one exception at 500F on the transverse specimens. However, from room temperature to 300F, the strength properties showed almost no change with respect to strain rate except for a point at room temperature on the longitudinal specimens.
Download or read book Effect of Thermal Exposure Forming and Welding on High temperature Dispersion strengthened Aluminum Alloy Al 8Fe 1V 2Si written by and published by . This book was released on 1991 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sharp Notch Behavior of Some High Strength Sheet Aluminum Alloys and Welded Joints at 75 320 and 423 F written by M. P. Hanson and published by . This book was released on 1961 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminum alloys, because of their face-centered cubic structure, offer distinct advantages as structural materials for use at cryogenic temperatures, at which some other metals are brittle. Accordingly, tests of seven alloys (2014-T6, 2219-T62, 5456-H321, 6061-T6, 7075-T6, 7079-T6, and 7178-T6) using smooth and sharply notched, longitudinal and transverse specimens of plain and welded 1/8-in. sheet were made at 75, -320 (liquid nitrogen), and -423 F (liquid hydrogen). As parent metal, all alloys were found to be suitable for use at these temperatures, exhibiting ductile behavior throughout the full temperature range. For welded structures or in applications where notch sensitivity is important, the use of some of the higher strength heat treated alloys may necessitate special precautions in design. While as-welded joints in each alloy had lower strengths than the parent metal at all temperatures, welds in alloy 2219-T62 when reheat treated had strengths equal to those of the parent metal. The sharp-notch sensitivities of welds in some alloys were less than those of the parent metals.
