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Propagation of shear bands in a Cu47.5Zr47.5Al5 bulk metallic glass

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Abstract

We report a novel finding of slither propagation of shear bands on the fracture surface of a Cu47.5Zr47.5Al5 bulk metallic glass (BMG). The nanoscale heterogeneities in the as-cast state are aggregated along shear bands with irregular morphology. Such heterogeneities create a fluctuating stress field during shear band propagation leading to a slither propagation mode. The slither propagation of 10 to 15 nm wide shear bands is effective to improve both the plasticity and the “work-hardening-like” behavior of BMGs if the size, the morphology, and the elastic properties of the heterogeneities are intimately intercalated during solidification.

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Acknowledgments

This work was supported by the European Union within the framework of the Research Training Network on ductile bulk metallic glass composites (MRTN-CT-2003-504692) and by the Center for Nanostructured Materials Technology (Grant 05K1501-00410) under the 21st Century Frontier R&D Program by of the Korea Ministry of Science and Technology, the Korean Ministry of Commerce, Industry and Energy for the development of structural metallic materials as well as by the Natural Science Foundation of China (Grant Nos. 50321101, 50401019, and 50323009), and the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (ROI-2007-000-10549-0), and the Hundred of Talents Project by the Chinese Academy of Sciences.

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Authors and Affiliations

  1. Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Gwangjin-gu, Seoul, 143-747, Korea

    K.B. Kim

  2. Leibniz Institute for Solid State and Materials Research (IFW) Dresden, Institute for Complex Materials, Dresden, D-01171, Germany

    J. Das, M.H. Lee & J. Eckert

  3. Department of Materials Sciences and Metallurgy, Kyungpook National University, Buk-gu, Daegu, 702-701, Korea

    S. Yi

  4. Advanced Metals Research Center, Korea Institute of Sciences and Technology, Cheongryang, Seoul, 130-650, Korea

    E. Fleury

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

    Z.F. Zhang

  6. Institute of Physics, Chinese Academy of Sciences, Beijing, 100080, China

    W.H. Wang

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  1. K.B. Kim
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  2. J. Das
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  3. M.H. Lee
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  8. J. Eckert
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Correspondence to K.B. Kim.

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Kim, K., Das, J., Lee, M. et al. Propagation of shear bands in a Cu47.5Zr47.5Al5 bulk metallic glass. Journal of Materials Research 23, 6–12 (2008). https://doi.org/10.1557/JMR.2008.0025

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  • DOI: https://doi.org/10.1557/JMR.2008.0025

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