Fracture toughness and fatigue crack propagation behavior of Al-Li 8090 alloy

We present results of fatigue tests of high-strength 8090 Al-Li alloy and data on its fatigue crack growth resistance. High strength combined with fairly high crack growth resistance and endurance limit results in much better service characteristics compared to other high-strength aluminum alloys. W...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) N.Y.), 1995-01, Vol.31 (1), p.39-53
Main Authors: Burzic, Z, Sedmak, S, Maksimovic, S, Grahovac, N, Curovic, J, Stefanovic, V
Format: Article
Language:English
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Summary:We present results of fatigue tests of high-strength 8090 Al-Li alloy and data on its fatigue crack growth resistance. High strength combined with fairly high crack growth resistance and endurance limit results in much better service characteristics compared to other high-strength aluminum alloys. We discuss results of tensile and impact tests of Charpy specimens and the critical values of the J-integral and K sub IC for 10 mm thick specimens in the T-L and L-T orientations subjected to complete and partial aging. The experimental results are compared with published data for 8090 and other high-strength Al alloys. We suggest a numerical method for the evaluation of fatigue strenth according to da/dN- Delta K diagrams.
ISSN:1068-820X