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Fatigue properties of the Alclad Al-Cu-Mg-Si-Mn alloy

Published online by Cambridge University Press:  04 July 2016

J. A. Sova  and
T. R. G. Williams
J. A. Sova
Affiliation:
Department of Mechanical Engineering, University of Southampton
T. R. G. Williams
Affiliation:
Department of Mechanical Engineering, University of Southampton
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Extract

Despite the wide use of Alclad aluminium alloy sheets in the aircraft industry, information on the effect of cladding on the mechanical strength of the strong alloy core is mainly limited to comparative fatigue testing of clad and unclad sheets, tested as plain specimens and subjected to constant-amplitude loadings. S/N curves obtained under such conditions were published by Smith, Brueggeman and Harwell for 24S-T3 material and by Shabalin for the D16T alloy (Russian specification). Both sets of data show that the soft cladding had a detrimental effect upon the fatigue strength of the strong alloy. Forrest has presented several comparative S/N curves which also show a reduction in the fatigue strength of the Alclad unnotched specimens compared with the bare alloy. Karlashov and Batov investigated the behaviour of cyclically-strained D16AT alloy (Russian specification), with particular reference to the nature of the mechanism of protection offered by pure aluminium. Although the core was electrochemi-cally protected against corrosion, intense damage occurred in the cladding layer.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 78 , Issue 764 , August 1974 , pp. 375 - 379
Copyright
Copyright © Royal Aeronautical Society 1974 

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Footnotes

*

Now at the School of Applied Sciences, University of Sussex, Brighton.

References

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