Effect Of Corrosion On The Fatigue Behavior Of 2024-T4 Aluminum Alloy
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Report Number: ASD TR 61-121
Author(s): Harmsworth, Clayton L.
Corporate Author(s): Directorate of Materials and Processes
Laboratory: Directorate of Materials and Processes
Date of Publication: 1961-07
Pages: 31
Contract: Laboratory Research - No Contract
DoD Project: 7381
DoD Task: 73812
Identifier: AD0268569
Abstract:
An investigation was conducted to determine the effect of corrosion pitting on the fatigue behavior of 2024-T4 aluminum alloy and to establish a method of measuring pitting corrosion damage with respect to fatigue. It was found that surface roughness measurements could be used to give a useful indication of the fatigue life that may be expected from a corroded structural member of 2024-T4 aluminum. The effect of pre-existing corrosion on the mechanism of fatigue was determined to be largely that of a stress raiser. In the case of pitting corrosion, calculations could be made, based upon critical pit measurements, to determine the stress concentration effect of the corrosion pit.
Provenance: Lockheed Martin Missiles & Fire Control
Author(s): Harmsworth, Clayton L.
Corporate Author(s): Directorate of Materials and Processes
Laboratory: Directorate of Materials and Processes
Date of Publication: 1961-07
Pages: 31
Contract: Laboratory Research - No Contract
DoD Project: 7381
DoD Task: 73812
Identifier: AD0268569
Abstract:
An investigation was conducted to determine the effect of corrosion pitting on the fatigue behavior of 2024-T4 aluminum alloy and to establish a method of measuring pitting corrosion damage with respect to fatigue. It was found that surface roughness measurements could be used to give a useful indication of the fatigue life that may be expected from a corroded structural member of 2024-T4 aluminum. The effect of pre-existing corrosion on the mechanism of fatigue was determined to be largely that of a stress raiser. In the case of pitting corrosion, calculations could be made, based upon critical pit measurements, to determine the stress concentration effect of the corrosion pit.
Provenance: Lockheed Martin Missiles & Fire Control