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Enhancement of plasticity in Ti-rich Ti–Zr–Be–Cu–Ni–Ta bulk glassy alloy via introducing the structural inhomogeneity

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Abstract

The effect of microstructural inhomogeneities with different length scale on the plasticity of (Ti45Zr16Be20Cu10Ni9)100–xTax (x = 0, 5, and 10) bulk glassy alloys has been studied. The formation of specific heterogeneous microstructures with a different type of structural inhomogeneity, i.e., short-/medium-range ordered clusters or micrometer-scale ductile dendrites combined with a glassy matrix, evolved by appropriately tuning the alloy chemistry, improves the room temperature plasticity up to ∼12.5% and ∼15%, respectively. The pronouncedly enhanced plasticity is mainly attributed to the retardation of shear localization and multiplication of shear bands by controlling the plastic and failure instabilities otherwise responsible for premature failure.

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Acknowledgments

The authors are grateful to J.H. Na, K.R. Lim, J. Jayaraj, and J.S. Park for valuable discussions. This work was supported by the Global Research Laboratory Program of the Korea Ministry of Science and Technology. J.M. Park acknowledges the support from the Third Stage of Brain Korea 21 Project in 2008. E. Fleury is grateful for the grant (Code No.: 07K1501-00410) from the Center for Nanostructured Materials Technology under the “21st Century Frontier R&D Programs.”

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Authors and Affiliations

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

    Jin Man Park & Do Hyang Kim

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

    Ki Buem Kim

  3. Advanced Metal Research Center, Korea Institute of Science and Technology, Seoul, 130-650, Korea

    Eric Fleury

  4. Advanced Materials Division, Korea Institute of Industrial Technology, Incheon, 406-840, Korea

    Min Ha Lee

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

    Won Tae Kim

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

    Jürgen Eckert

  7. Institute of Materials Science, Technische Universität (TU) Dresden, D-01062, Dresden, Germany

    Jürgen Eckert

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  1. Jin Man Park
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  2. Do Hyang Kim
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  3. Ki Buem Kim
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  5. Min Ha Lee
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  7. Jürgen Eckert
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Correspondence to Do Hyang Kim.

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Park, J.M., Kim, D.H., Kim, K.B. et al. Enhancement of plasticity in Ti-rich Ti–Zr–Be–Cu–Ni–Ta bulk glassy alloy via introducing the structural inhomogeneity. Journal of Materials Research 23, 2984–2989 (2008). https://doi.org/10.1557/JMR.2008.0357

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