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High-strength bulk Al-based bimodal ultrafine eutectic composite with enhanced plasticity

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Abstract

An in situ bulk ultrafine bimodal eutectic Al-Cu-Si composite was synthesized by solidification. This heterostructured composite with microstructural length scale hierarchy in the eutectic microstructure, which combines an ultrafine-scale binary cellular eutectic (α-Al + Al2Cu) and a nanometer-sized anomalous ternary eutectic (α-Al + Al2Cu + Si), exhibits high fracture strength (1.1 ± 0.1 GPa) and large compressive plastic strain (11 ± 2%) at room temperature. The improved compressive plasticity of the bimodal-nanoeutectic composite originates from homogeneous and uniform distribution of inhomogeneous plastic deformation (localized shear bands), together with strong interaction between shear bands in the spatially heterogeneous structure.

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Authors and Affiliations

  1. Leibniz Institute for Solid State and Materials Research Dresden, Institute for Complex Materials, D-01171, Dresden, Germany

    ** Man Park, Norbert Mattern, Uta Kühn & Jürgen Eckert

  2. Center for Non-Crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul, 120-749, Republic of Korea

    ** Man Park & Do Hyang Kim

  3. TU Dresden, Institute of Materials Science, D-01062, Dresden, Germany

    Jürgen Eckert

  4. Department of Advanced Materials Engineering, Sejong University, Seoul, 143-747, Republic of Korea

    Ki Buem Kim

  5. Division of Applied Science, Cheongju University, Cheongju, 360-764, Republic of Korea

    Won Tae Kim

  6. Department of Metallurgy, Indian Institute of Science, Bangalore, 560-012, India

    Kamanio Chattopadhyay

Authors
  1. ** Man Park
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  2. Norbert Mattern
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  3. Uta Kühn
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  4. Jürgen Eckert
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  5. Ki Buem Kim
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  6. Won Tae Kim
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  7. Kamanio Chattopadhyay
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  8. Do Hyang Kim
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Correspondence to Do Hyang Kim.

Additional information

This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to https://www.mrs.org/jmr_policy

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Park, J.M., Mattern, N., Kühn, U. et al. High-strength bulk Al-based bimodal ultrafine eutectic composite with enhanced plasticity. Journal of Materials Research 24, 2605–2609 (2009). https://doi.org/10.1557/jmr.2009.0297

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  • DOI: https://doi.org/10.1557/jmr.2009.0297

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