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Strength asymmetry of ductile dendrites reinforced Zr- and Ti-based composites

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Abstract

We report on significant asymmetry phenomena, including failure mode, fracture strength, and plasticity under compression and tension, for Zr- and Ti-based composites containing ductile dendrites. The failure of the Zr-based composite always occurs in a shear mode with a small strength asymmetry and different plasticity under tension and compression. In contrast, the Ti-based composite exhibits a significant high strength asymmetry and zero tensile plasticity although its compressive plasticity is high. We propose that the ratio, α=τ0/σ0 (τ0 and σ0 are the intrinsic shear and cleavage strengths), is a substantial parameter controlling the strength asymmetry and the failure mode of various materials.

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Authors and Affiliations

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

    F. F. Wu & Z. F. Zhang

  2. Liquidmetal Technologies, Inc., Lake Forest, California, 92630, USA

    A. Peker

  3. Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, 15261, USA

    S. X. Mao

  4. Physical Metallurgy Division, Department of Materials and Geo Sciences, Darmstadt University of Technology, D-64287, Darmstadt, Germany

    J. Das & J. Eckert

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  1. F. F. Wu
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  2. Z. F. Zhang
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  3. A. Peker
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  4. S. X. Mao
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  5. J. Das
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  6. J. Eckert
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Correspondence to Z. F. Zhang.

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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/publications/jmr/policy.html.

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Wu, F.F., Zhang, Z.F., Peker, A. et al. Strength asymmetry of ductile dendrites reinforced Zr- and Ti-based composites. Journal of Materials Research 21, 2331–2336 (2006). https://doi.org/10.1557/jmr.2006.0279

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  • DOI: https://doi.org/10.1557/jmr.2006.0279

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