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The effect of D2O on fatigue-crack propagation in a high-strength aluminum alloy

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Abstract

The rates of fatigue-crack propagation for a high-strength aluminum alloy (7075-T651) in an environment of D2O (99.98% purity) at room temperature were determined and compared with data obtained in high-purity argon and distilled water. The results showed that D2O caused a ten-fold increase in the rate of fatigue-crack propagation (up to 10−4 inch per cycle), which is equal to the increase caused by distilled water. These results lend further support to the previous observation that the rate controlling process for fatigue-crack propagation in this alloy (at rates below 10−4 inch per cycle) is the mechanical process of creating new crack surfaces, instead of either the transport of aggressive environment to the crack-tip or diffusion of hydrogen ions into the material ahead of the crack tip.

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Authors and Affiliations

  1. Department of Mechanical Engineering and Mechanics and Center for Surface and Coatings Research, Lehigh University, Bethlehem, Pennsylvania

    R. P. Wei & J. D. Landes

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  1. R. P. Wei
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  2. J. D. Landes
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Wei, R.P., Landes, J.D. The effect of D2O on fatigue-crack propagation in a high-strength aluminum alloy. Int J Fract 5, 69–71 (1969). https://doi.org/10.1007/BF00189941

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  • DOI: https://doi.org/10.1007/BF00189941

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