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Novel microstructures from severely deformed Al–Ti alloys created by chip formation in machining

  • Ultrafine-Grained Materials
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Abstract

We present some consequences of Severe Plastic Deformation (SPD) of Al–Ti alloys by chip formation in machining that can enable opportunities for creating novel microstructures. Chips cut from Al-6wt%Ti are composed of a refined dispersion of the fragmented remains of a hitherto coarse Al3Ti embedded in a nanostructured matrix. This multi-phase nanostructured chip material demonstrates considerable resistance to coarsening owing to the thermally stable dispersion of ultra-fine Al3Ti dispersions and thus has promise in structural alloy applications. Furthermore, the Al–Ti machining chips are shown to possess excellent grain refining characteristics, leading to microstructurally refined and homogeneous Al alloy castings. This realization enables a low-cost route for enhancing the efficiency of the grain refiner master alloy systems by exploiting SPD during chip formation.

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Acknowledgements

Shankar and Cai acknowledge support from the Central Research Development Fund, University of Pittsburgh.

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Authors and Affiliations

  1. Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA

    Jiazhao Cai & M. Ravi Shankar

  2. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261, USA

    Andreas Kulovits & Jörg Wiezorek

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  1. Jiazhao Cai
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  2. Andreas Kulovits
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  3. M. Ravi Shankar
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  4. Jörg Wiezorek
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Correspondence to M. Ravi Shankar.

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Cai, J., Kulovits, A., Ravi Shankar, M. et al. Novel microstructures from severely deformed Al–Ti alloys created by chip formation in machining. J Mater Sci 43, 7474–7480 (2008). https://doi.org/10.1007/s10853-008-2887-4

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  • DOI: https://doi.org/10.1007/s10853-008-2887-4

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