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Map** the Strain Distributions in Deformed Bulk Metallic Glasses Using Hard X-Ray Diffraction

  • Symposium: Neutron and X-Ray Studies of Advanced Materials IV
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Abstract

The deformation behavior of Cu45 Zr46.5 Al7Ti1.5 bulk metallic glass (BMG) under bending was investigated in-situ using high-energy X-ray synchrotron diffraction. Samples were bent using two different benders with radii of 10 and 20 mm. The components of the strain tensor were determined from the change of positions of the first maximum of the diffracted intensity in reciprocal space. The procedure of data treatment was improved by the introduction of direct beam off-center correction. Comparing results for the two different bending radii, we found that the zero stress region does not necessarily lay within the central part of the specimen. Bending with smaller radius resulted in symmetric strain distribution, whereas a larger bending radius revealed strong asymmetry. Furthermore, bending with a smaller radius (10 mm) shows steeper strain gradients as compared with the situation in which the larger bending radius (20 mm) was used. Using a smaller bending radius implies reaching higher tensile/compressive stresses and reveals the signs of the plastic deformation, which are demonstrated as a saturation of elastic strains.

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Acknowledgments

We acknowledge the Deutsches Elektronen-Synchrotron for provision of the synchrotron radiation facility in using the beamline BW5. One of the authors (JB) thanks V. Honkimäki for the stimulating discussion regarding the off-center correction. Financial support from the Zhejiang University-Helmholtz cooperation fund, the National Natural Science Foundation of China (Grant Nos. 51071141, 50701038, 60776014, 60876002, and 10804096), the Ministry of Education of China (Program for Changjiang Scholars), the Department of Science and Technology of Zhejiang province, and Zhejiang University is gratefully acknowledged.

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Authors and Affiliations

  1. Deutsches Elektronen-Synchrotron DESY, 22603, Hamburg, Germany

    J. Bednarcik (Postdoctor) & H. Franz (Group Leader PETRA III Experiments)

  2. International Center for New-Structured Materials ICNSM, Zhejiang University, Hangzhou, 310027, P.R. China

    L. Y. Chen (Postdoctor), X. D. Wang (Postdoctor) & J. Z. Jiang (Group Leader)

  3. Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P.R. China

    L. Y. Chen (Postdoctor), X. D. Wang (Postdoctor) & J. Z. Jiang (Group Leader)

  4. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, P.R. China

    J. Z. Jiang (Group Leader)

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  1. J. Bednarcik
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  2. L. Y. Chen
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  3. X. D. Wang
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  4. J. Z. Jiang
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  5. H. Franz
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Correspondence to J. Bednarcik.

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Manuscript submitted February 15, 2011.

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Bednarcik, J., Chen, L.Y., Wang, X.D. et al. Map** the Strain Distributions in Deformed Bulk Metallic Glasses Using Hard X-Ray Diffraction. Metall Mater Trans A 43, 1558–1563 (2012). https://doi.org/10.1007/s11661-012-1079-7

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  • DOI: https://doi.org/10.1007/s11661-012-1079-7

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