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The effect of prestrain on the natural aging and fracture behaviour of AA6111 aluminum

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Abstract

In this paper, the effect of prestrain on the T4 behaviour as well as fracture behaviour of AA6111 has been investigated with a view to understanding its strengthening characteristics under this condition. The evaluation methods include tensile testing, differential scanning calorimetry (DSC) and fractography using scanning electron microscopy (SEM). It was found that AA6111 develops increased strength with increasing levels of prestrain during natural aging. The application of plastic prestrain prior to natural aging increases the speed with which the various phases form during natural aging, while decreasing the volume fraction of GPI zones. Prior prestrain and subsequent natural aging show improvement in the dimpled tensile fracture. However, the role of intermetallic particles is significant in that they serve as nucleation sites for fracture.

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  1. Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9

    G. K. Quainoo & S. Yannacopoulos

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  1. G. K. Quainoo
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  2. S. Yannacopoulos
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Quainoo, G.K., Yannacopoulos, S. The effect of prestrain on the natural aging and fracture behaviour of AA6111 aluminum. Journal of Materials Science 39, 4841–4847 (2004). https://doi.org/10.1023/B:JMSC.0000035323.96458.68

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  • DOI: https://doi.org/10.1023/B:JMSC.0000035323.96458.68

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