The Influence of Testing Parameters on Stress Corrosion Crack Growth in the High Strength Aluminium Alloy 7010-T651 PDF Download
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Author: L. Schra Publisher: ISBN: Category : Alloys Languages : en Pages : 60
Book Description
An interlaboratory testing programme to evaluate the rising displacement test for stress corrosion crack (SCC) growth investigations was carried out within the framework of the "Measurements and Testing" programme of the European Community under BCR contract nr. MATI CT 930038. The contribution of the NLR to the project consisted of testing of precracked Double Cantilever Beam (DCB) Specimens made from the high strength aluminium alloy 7010-T651 under constant displacement and by continuous immersion in substitute ocean water. The results of these static tests were to be used as reference data for the dynamic rising displacement tests carried out by other participants in the project. Further, additional static tests were carried out by the NLR using alternate y. Duriimmersion in substitute ocean water. The results of these tests were compared with those of 7010-T651 plate from another batch of material tested previously at the NLR.
Author: L. Schra Publisher: ISBN: Category : Alloys Languages : en Pages : 60
Book Description
An interlaboratory testing programme to evaluate the rising displacement test for stress corrosion crack (SCC) growth investigations was carried out within the framework of the "Measurements and Testing" programme of the European Community under BCR contract nr. MATI CT 930038. The contribution of the NLR to the project consisted of testing of precracked Double Cantilever Beam (DCB) Specimens made from the high strength aluminium alloy 7010-T651 under constant displacement and by continuous immersion in substitute ocean water. The results of these static tests were to be used as reference data for the dynamic rising displacement tests carried out by other participants in the project. Further, additional static tests were carried out by the NLR using alternate y. Duriimmersion in substitute ocean water. The results of these tests were compared with those of 7010-T651 plate from another batch of material tested previously at the NLR.
Author: JE. Finnegan Publisher: ISBN: Category : Aluminum Languages : en Pages : 17
Book Description
Stress-corrosion cracking experiments have been performed on double-cantilever-beam specimens of 7079-T651 aluminum in 3 percent sodium chloride in distilled water and in seawater. At relatively low-stress intensities (Region I of the crack-growth rate/stress-intensity plot) crack length versus exposure time curves were comprised of steps, plateaus, and straight-line segments. These could not be related to any variations in the stress-intensity parameter; so, where such behavior was encountered, no unique relationship between stress intensity and crack-growth rate was apparent. On the other hand, crack-growth rate did vary inversely with exposure time for the range 25 to 200 h. Such an observation was interpreted to mean that properties of the local environment within a crack control extension rate.
Author: JW. Coursen Publisher: ISBN: Category : Aluminum alloys Languages : en Pages : 14
Book Description
Propagation rates for stress-corrosion cracking (SCC) of high-strength aluminum alloys determined with mechanically precracked double-cantilever-beam (DCB) specimens provide a quantitative means of comparing the resistance to SCC of alloys and tempers. For relatively resistant materials however, the rates can be markedly influenced by test conditions and interpretation of the crack-growth data. This paper describes a relatively simple, accelerated testing method for determining SCC velocities that rank the SCC behavior of aluminum alloys in the same order as SCC propagation rates in a seacoast or industrial atmosphere. Practical difficulties associated with this test method, however, warrant further evaluation to justify this as a primary method of testing.
Author: Gunter Ogiermann Publisher: ISBN: Category : Aluminum alloys Languages : en Pages : 18
Book Description
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).
Author: A. M. Willner Publisher: ISBN: Category : Languages : en Pages : 19
Book Description
The tests performed indicate that if the phenomenon of slow crack growth due to stress corrosion is present in the two aluminum alloys, 7075-T6 and 2024-T3, its effect is not clearly evident in short time tests performed on specimens having the geometry and dimensions indicated in fig. 1. By using thicker specimens which would exhibit a flat fracture surface and/or running the tests for a longer period of time the effect might be more pronounced. Of all the environments tested, the only one indicating any sign of inducing slow crack growth was the NaC1 solution. With this environment the corrosion process may be associated with the removal or breaking away of a protective surface film. Furthermore, the process of stress corrosion may be aided by the presence of an observed hardened zone near the tip of the notch. (Author).
Author: L. Schra
Author: L. Schra
Author: Benjamin Floyd Brown
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Author: 
Author: JE. Finnegan
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Author: J. D. Jackson
Author: JW. Coursen
Author: Gunter Ogiermann
Author: A. M. Willner