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The influence of ECAP on the small punch creep of Al–4 vol.% Al4C3 composite

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Abstract

The creep behaviour of a composite based on an aluminium matrix reinforced by 4 vol.% Al4C3 was studied at temperatures of 623 and 723 K by small punch testing with a constant force. The composite was tested in two different states: (i) as received by mechanical alloying with hot extrusion (HE) as the final operation and (ii) with equal channel angular pressing (ECAP) superimposed on the hot-extruded material. The ECAP does not improve the observed creep resistance. The reduction of force leading to the same deflection rate is not very significant. This points out that the ECAP process of the present composite, which produces substantial strengthening at lower temperatures, is not accompanied by pronounced weakening of creep resistance at elevated temperatures. The threshold force in the ECAP material is about 5 N weaker than in the HE material.

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Acknowledgements

This paper is based on work supported by the Academy of Sciences of the Czech Republic under Grant 1QS200410502 and by the grant agency VEGA, Slovak Republic within the project 2/5142/25. Special thanks are due to Prof. Dr. Gerhard Jangg, Dr. h.c. (formerly of Vienna University of Technology, Vienna, Austria) for providing the experimental material.

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Authors and Affiliations

  1. Institute of Physics of Materials, Academy of Science of the Czech Republic, Žižkova 22, 616 62, Brno, Czech Republic

    Ferdinand Dobeš & Karel Milička

  2. Institute of Materials Research of Slovak Academy of Sciences, Watsonova 47, 043 53, Košice, Slovak Republic

    Michal Besterci

  3. Department of Non-ferrous Metals and Waste Treatment, Faculty of Metallurgy, Technical University, Letná 9/A, 042 00, Košice, Slovak Republic

    Tibor Kvačkaj

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  1. Ferdinand Dobeš
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  2. Karel Milička
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  4. Tibor Kvačkaj
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Correspondence to Ferdinand Dobeš.

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Dobeš, F., Milička, K., Besterci, M. et al. The influence of ECAP on the small punch creep of Al–4 vol.% Al4C3 composite. J Mater Sci 45, 5171–5176 (2010). https://doi.org/10.1007/s10853-010-4554-9

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  • DOI: https://doi.org/10.1007/s10853-010-4554-9

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