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Development of evaluation technique for microcharacteristics of thixoforged wrought aluminum alloy by nanoindention and atomic force microscopy

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Abstract

This study demonstrated nanoindentation techniques of investigating the effects of size and feature in a microstructure on the mechanical properties of thixoforged aluminum alloy. Mechanical properties and tribological characteristics of rheology-forged Al2024 wrought aluminum alloy in terms of T6 heat treatment were investigated by varying the aging time by nanoindentation and nanoscratch techniques. By nanoindentation/nanoscratch tests and atomic force microscopy, it was demonstrated that the 4-h aged material exhibited the highest hardness because of the intermediate precipitate phase θ″, which was precipitated by T6 heat treatment. Moreover, the friction coefficients in the precipitates in the eutectic phase region were lower than those in the primary α phase region.

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Authors and Affiliations

  1. School of Mechanical Engineering, Pusan National University, Busan, 609-735, South Korea

    S. H. Cho & C. G. Kang

  2. Engineering Research Center for Net Shape and Die Manufacturing, Pusan National University, Busan, 609-735, South Korea

    S. M. Lee

Authors
  1. S. H. Cho
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  2. C. G. Kang
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  3. S. M. Lee
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Correspondence to C. G. Kang.

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Cho, S.H., Kang, C.G. & Lee, S.M. Development of evaluation technique for microcharacteristics of thixoforged wrought aluminum alloy by nanoindention and atomic force microscopy. Int J Adv Manuf Technol 42, 892–909 (2009). https://doi.org/10.1007/s00170-008-1650-y

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  • DOI: https://doi.org/10.1007/s00170-008-1650-y

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