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Fatigue Resistance of Duralumin

Description: Where, in the following report, mention is made of fatigue, it always refers to the weakening of the material produced by rapidly changing stresses below the point of elasticity. The alternating stress was obtained by a test bar which was held at one end and subjected to rotation. Most of the tests were conducted on connecting rods.
Date: September 1922
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Recent Developments in Light Alloys

Description: This report is intended to cover the progress that has been made in both the manufacture and utility of light alloys in the United States since the first part of 1919. Duralumin is extensively discussed both as to manufacture and durability.
Date: November 1920
Creator: Woodward, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Duralumin

Description: Various properties of duralumin as used in aircraft construction are discussed, including the effects of temperature, working, tempering, and strength.
Date: July 1920
Creator: Unger, E. & Schmidt, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tests on Riveted Joints in Sheet Duralumin

Description: In making tension tests, the slippage of the joints was noted at three points across each joint. In addition, stress strain curves were obtained for plain tension specimens, and a chemical analysis was made of the sheet.
Date: November 1923
Creator: Rettew, H. F. & Thumin, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin III: Effect of the Previous Treatment of Sheet Material on the Susceptibility to This Type of Corrosion

Description: As a result of testing, it was determined that control of the rate of quenching and the avoidance of accelerated aging by heating are the only means of modifying duralumin itself so as to minimize the intercrystalline form of corrosive attack. It is so simple a means that it should be adopted even though it may not completely prevent, but only reduce, this form of corrosive attack. By so doing, the need for protection of the surface is less urgent.
Date: April 1928
Creator: Rawdon, Henry S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin IV: The Use of Protective Coatings

Description: Although the corrosion resistance of sheet duralumin can be greatly improved by suitable heat treatment, protection of the surface is still necessary if long life under varied service conditions is to be insured. The coatings used for this purpose may be grouped into three classes: the varnish type of coating, the oxide type produced by a chemical treatment of the surface, and metallic coatings, of which aluminum appears to be the most promising. Since the necessary weather exposure tests are n… more
Date: April 1928
Creator: Rawdon, Henry S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin. V: Results of Weather-Exposure Tests

Description: In a series of weather exposure tests of sheet duralumin, upon which accelerated corrosion tests in the laboratory by the wet-and-dry corrosion method in a sodium chloride solution has already been carried out, a close parallelism between the results of the two kinds of tests was found to exist. The exposure tests showed that the lack of permanence of sheet duralumin is largely, if not entirely, due to corrosion. A corrosion attack of an intercrystalline nature is very largely responsible for t… more
Date: February 1929
Creator: Rawdon, Henry S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin I: Practical Aspects of the Problem

Description: Since aircraft design is tending toward all-metal construction, the strong heat-treatable light aluminum alloy, duralumin (a generic name for a class of heat-treatable alloys containing Cu, Mg, Mn, and Si), is finding increasing application. Doubt has been expressed concerning the reliability and permanence of these materials. Information is given on the effect of corrosion on the tensile properties of 14-gauge sheet duralumin, heat treated by quenching in hot water after being heated for 15 mi… more
Date: April 1928
Creator: Rawdon, Henry S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin. VI: The Effect of Corrosion Accompanied by Stress on the Tensile Properties of Sheet Duralumin

Description: The effect of corrosion on the tensile properties of duralumin while stressed is shown in graphical form. According to the test results, duralumin sheet, coated with aluminum, maintains its initial properties unimpaired for corrosion periods as long as 60 days with an applied tensile stress as high as 20,000 lb/sq.in., which is approximately one-half the stress corresponding to the yield point as defined here. In these tests, that material which had been heat-treated by being quenched in cold w… more
Date: May 1929
Creator: Rawdon, Henry S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin II: Accelerated Corrosion Tests and the Behavior of High-Strength Aluminum Alloys of Different Compositions

Description: The permanence, with respect to corrosion, of light aluminum alloy sheets of the duralumin type, that is, heat-treatable alloys containing Cu, Mg, Mn, and Si is discussed. Alloys of this type are subject to surface corrosion and corrosion of the interior by intercrystalline paths. Results are given of accelerated corrosion tests, tensile tests, the effect on corrosion of various alloying elements and heat treatments, electrical resistance measurements, and X-ray examinations.
Date: April 1928
Creator: Rawdon, Henry S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Duralumin, Its Properties and Uses

Description: A historical sketch of duralumin is presented, especially in regards to its manufacture by various countries. The properties of duralumin are discussed and strength characteristics listed. Increasing the hardness of duralumin by tempering is discussed as well as the uses of the metal.
Date: October 1924
Creator: Beck, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Heat Treatment of Duralumin

Description: When certain light aluminum alloys are heat-treated, quenched and aged, there is considerable improvement in their tensile properties. This paper presents different methods of accomplishing these heat treatments.
Date: March 1927
Creator: Nelson, Wm.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Duralumin Welding

Description: Gas and electric welding of duralumin are discussed. Some of the elements that go into determining a successful weld and inspecting for faults are also described.
Date: February 1927
Creator: Nelson, Wm.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Duralumin and Its Corrosion

Description: The types of corrosion and factors of corrosion of duralumin are investigated. Salt water is the most common of the corroding media with which designers have to contend in using duralumin in aircraft and ships.
Date: April 1927
Creator: Nelson, Wm.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Duralumin - Defects and Failures

Description: It is proposed in this paper to identify some of the defects and failures in duralumin most frequently encountered by the aircraft industry with a view to indicate their importance. The defects and failures in duralumin may be classified into the following groups: 1) defects produced during manufacture; 2) defects produced during fabrication; 3) corrosion and erosion; and 4) fatigue failures. Only the first two will be covered in this report.
Date: December 1927
Creator: Nelson, Wm.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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