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Solute Diffusion Characteristics of a Rapid Hardening Al-Cu-Mg Alloy during the Early Stages of Age Hardening

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Abstract

The heat-transfer characteristics of a rapid hardening Al-1.1Cu-1.7Mg at. pct alloy during the early stages of age hardening have been tested, both by experiment and finite element modeling, for a typical laboratory-scale sample, and subsequently a maximum diffusion distance by random walk has been calculated for the solute atom species. It is found that due to small diffusion distances compared to the average dislocation loop interspacing, the dislocation-locking hardness mechanism is not likely, and rather, the cluster hardening model is more accurate.

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Funding from the Australian Research Council is gratefully acknowledged. One of the authors (RKWM) also acknowledges support from the CSIRO Light Metals Flagship postgraduate scholarship scheme. The authors are grateful for scientific and technical input and support from the Australian Microscopy & Microanalysis Research Facility (AMMRF) node at The University of Sydney, particularly Mr. Peter Liddicoat and Dr. Tomoyuki Honma. The authors also thank Dr. Chris Hutchinson, Monash University, for fruitful discussions.

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Authors and Affiliations

  1. Australian Centre for Microscopy & Microanalysis, The University of Sydney, Sydney, NSW, 2006, Australia

    R.K.W. Marceau, N. Tsafnat, D. Haley & S.P. Ringer

Authors
  1. R.K.W. Marceau
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  2. N. Tsafnat
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  3. D. Haley
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  4. S.P. Ringer
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Correspondence to R.K.W. Marceau.

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Manuscript submitted June 10, 2009.

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Marceau, R., Tsafnat, N., Haley, D. et al. Solute Diffusion Characteristics of a Rapid Hardening Al-Cu-Mg Alloy during the Early Stages of Age Hardening. Metall Mater Trans A 41, 1887–1890 (2010). https://doi.org/10.1007/s11661-010-0252-0

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  • DOI: https://doi.org/10.1007/s11661-010-0252-0

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