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Eddy current analysis of precipitation kinetics in aluminum alloys

  • Symposium on Nondestructive Evaluation—Predictive and Descriptive Probes of Mechanical Behavior of Metals
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Abstract

Electrical conductivity measurements by means of the eddy current technique were performed during precipitation hardening of an aluminum alloy, in order to determine dynamically the kinetics of the process. The data obtained from samples subjected to controlled precipitation hardening conditions, over a wide temperature range, provided an insight into the reaction mechanism. Correlations of the conductivity, data with hardness, measurements demonstrated the capability of this technique to determine nondestructively changes in the mechanical properties during the age hardening process. The eddy current method proved to be unique in being able to provide a quantitative evaluation of the extent of removal of the minor constituents (copper and magnesium) from the aluminum matrix. The adequacy of the eddy current method for real-time, in-process, monitoring, and control is discussed.

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Authors and Affiliations

  1. Materials Science Department and Nondestructive Evaluation Center, Johns Hopkins University, 21218, Baltimore, MD

    M. Rosen

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  1. M. Rosen
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Rosen, M. Eddy current analysis of precipitation kinetics in aluminum alloys. Metall Trans A 20, 605–610 (1989). https://doi.org/10.1007/BF02667578

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  • DOI: https://doi.org/10.1007/BF02667578

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