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Crack growth kinetics of 7050-T73651 aluminium alloy under constant load at 150°C

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Abstract

Crack growth tests at 150°C under constant load conditions were performed on compact tension specimens of 7050-T73651 aluminium alloy. The d.c. potential drop method was employed to monitor crack lengths throughout the tests. Fracture mechanics parameters such as the stress intensity factor (K) and energy-rate line integral (C *) were used to establish correlation with the crack propagation rates. As a result of experiments it was found that crack growth rates (da/dt) versus K, over discrete ranges of rates, can be described as a power-law equation in the form da/dt = AK n. The parameter C * appears to correlate well with the crack propagation rates through a single power law over a wide range of rates.

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Authors and Affiliations

  1. Department of Metallurgical Engineering, Middle East Technical University, Ankara, Turkey

    F. Sarioğlu, P. Abachi & M. Doruk

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  1. F. Sarioğlu
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  2. P. Abachi
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  3. M. Doruk
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Sarioğlu, F., Abachi, P. & Doruk, M. Crack growth kinetics of 7050-T73651 aluminium alloy under constant load at 150°C. Journal of Materials Science 28, 1430–1434 (1993). https://doi.org/10.1007/BF00363334

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