Stress Corrosion Testing of 7079-T6 Aluminum Alloy in Various Environments
Stress Corrosion Testing of 7079-T6 Aluminum Alloy in Various Environments

Author: B. W. Lifka

Publisher:

Published: 1967

Total Pages: 21

ISBN-13:

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Stress corrosion cracking of certain 7079-T6 aluminum alloy aircraft structures involving sustained tensile stress acting in an unfavorable grain direction has occurred sometimes in surprisingly mild environments. The resistance of short-transverse specimens of 7079-T6 products has been evaluated at different levels of applied stress in several different seacoast and inland industrial atmospheres. It was found that the atmosphere was more critical than the generally accepted alternate-immersion test using 3.5 per cent sodium chloride. The results of the outdoor tests are correlated with eight accelerated exposures; and consideration is given to the most suitable laboratory stress corrosion test environment for this alloy. A detailed analysis of the constant deformation methods of stressing is included.

Stress-Corrosion and Corrosion-Fatigue Susceptibility of High-Strength Aluminum Alloys
Stress-Corrosion and Corrosion-Fatigue Susceptibility of High-Strength Aluminum Alloys

Author: G. E. Nordmark

Publisher:

Published: 1970

Total Pages: 140

ISBN-13:

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The 'stress-corrosion-fatigue' performance of several high strength- aluminum alloys was investigated by tests of hydraulic cylinders and other types of specimens. Specimens were prepared from forgings and forging stock of alloys 2014-T6, 7075-T6, 7075-T73, 7079-T6, and X7080-T7 and from premium castings of alloy CH70-T7. Alloy 7075-T73 rated best in the corrosion-fatigue tests; no stress-corrosion cracking occurred in this alloy, and the lives of forged cylinders subjected to repeated loadings to 80% of design stress in a corrosive environment were at least 10 times as long for this alloy as for forged cylinders of alloys 2014-T6, 7075-T6, or 7079-T6. Fractographic examination showed that stress-corrosion cracking as well as fatigue cracking occurred in alloys 2014-T6, 7075-T6, and 7079-T6 in the stress-corrosion-fatigue tests. The investigation demonstrated that stress corrosion and fatigue can interact under certain conditions to produce failures in shorter times and fewer cycles than for either phenomenon occurring by itself.

New Methods for Corrosion Testing of Aluminum Alloys
New Methods for Corrosion Testing of Aluminum Alloys

Author: Vinod S. Agarwala

Publisher: ASTM International

Published: 1992

Total Pages: 227

ISBN-13: 0803114354

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Evaluates the usefulness of the current standards on exfoliation and corrosion testing of aluminum alloys and their applicability to new requirements and advanced alloys. The 13 papers, from an international symposium in San Francisco, May 1990, discuss whether the existing standards should be revis

Stress-corrosion Cracking of Aluminum Alloys
Stress-corrosion Cracking of Aluminum Alloys

Author: Gunter Ogiermann

Publisher:

Published: 1968

Total Pages: 18

ISBN-13:

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The report summarizes information from selected European papers and lectures that were published or presented between mid 1967 and July 1, 1968. Subjects discussed include: the nature of stress-corrosion, stress-corrosion in AlMg, AlMgZn, and AlMgSi alloys and testing for susceptibility to stress-corrosion cracking. (Author).

Stress-corrosion Studies of Aluminum Alloy 7079-t6 in Seawater
Stress-corrosion Studies of Aluminum Alloy 7079-t6 in Seawater

Author: George A. Wacker

Publisher:

Published: 1966

Total Pages: 22

ISBN-13:

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The stress-corrosion susceptibility of Aluminum Alloy 7079 in the T6 temper was investigated as a function of longitudinal, long-transverse, and short-transverse plate orientations. The alloy was found to be susceptible to stress-corrosion and pitting attack. Specimens oriented in the short transverse direction had the lowest resistance to damage in seawater. Variations in orientation-dependent stress-corrosion cracking susceptibility were related to microstructural characteristics. The alloy is considered unsuitable for naval applications under conditions conducive to stress corrosion. (Author).