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The impact behavior of aluminum alloy 6061: Effects of notch severity

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Abstract

In this paper the influence of notch acuity and test temperature on the impact behavior of aluminum alloy 6061 is presented and discussed. Notch angles of 45°, 60°, 75° and 90° were chosen for a standard charpy impact test specimen containing two such notches positioned at right angles to the applied load. For a given angle of the notch the dynamic fracture toughness increased with an increase in test temperature. At a given test temperature, the impact toughness of a ductile microstructure decreased with an increase in notch severity. For the least severe notch dynamic fracture surfaces revealed the occurrence of localized mixed-mode deformation at the elevated temperature. An increase in notch severity resulted in essentially Mode-I dominated fracture at all test temperatures. The results are discussed in light of alloy microstructure, fracture mechanisms and deformation field ahead of the advancing crack tip.

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Authors and Affiliations

  1. Department of Mechanical Engineering, The University of Akron, Akron, Ohio, 44325-3903, USA

    T. S. Srivatsan, J. Champlin & P. C. Lam

  2. Division of Materials Engineering, School of Applied Sciences, Nanyang Technological University, Nanyang Avenue, Singapore, 639798

    M. Manoharan

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  1. T. S. Srivatsan
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  2. J. Champlin
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  3. P. C. Lam
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  4. M. Manoharan
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Srivatsan, T.S., Champlin, J., Lam, P.C. et al. The impact behavior of aluminum alloy 6061: Effects of notch severity. Journal of Materials Science 34, 2793–2800 (1999). https://doi.org/10.1023/A:1004614814112

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