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Effect of processing on Charpy impact toughness of metallic glass matrix composites

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Abstract

In this study, compact Charpy impact testing was used to investigate the effect of processing history and dendrite morphology of bulk metallic glass matrix composites (BMGMCs) on impact toughness. Composite samples were fabricated via suction casting and semisolid forging, and the results were compared with crystalline alloys in the same geometry. A strong dependence on processing was observed, with samples exhibiting up to a 30-fold increase in impact toughness depending on processing and microstructure. Provided that attention is paid to processing techniques, BMGMCs are shown to have properties that equal or surpass some conventionally used crystalline alloys. These properties invite further exploration of these materials in structural applications.

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ACKNOWLEDGMENTS

The authors thank R. DeSalvo for assistance with the setup and Liquidmetal Technologies Inc. for supplying materials. D.C. Hofmann acknowledges financial support from the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). C.F. Zachrisson acknowledges financial support from American Association for the Advancement of Science Entry Point’s ACCESS, a program sponsored by NASA.

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Authors and Affiliations

  1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, 91109, USA

    Carl Zachrisson & Douglas C. Hofmann

  2. California Institute of Technology, Pasadena, California, 91126, USA

    Henry Kozachkov, Scott Roberts, Georg Kaltenboeck, Robert D. Conner, Marios D. Demetriou, William L. Johnson & Douglas C. Hofmann

  3. California State University—Northridge, Northridge, California, 91330, USA

    Robert D. Conner

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  1. Carl Zachrisson
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  2. Henry Kozachkov
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  4. Georg Kaltenboeck
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  7. William L. Johnson
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  8. Douglas C. Hofmann
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Correspondence to Douglas C. Hofmann.

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Zachrisson, C., Kozachkov, H., Roberts, S. et al. Effect of processing on Charpy impact toughness of metallic glass matrix composites. Journal of Materials Research 26, 1260–1268 (2011). https://doi.org/10.1557/jmr.2011.92

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  • DOI: https://doi.org/10.1557/jmr.2011.92

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