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“Work-Hardenable” Ductile Bulk Metallic Glass

Jayanta Das, Mei Bo Tang, Ki Buem Kim, Ralf Theissmann, Falko Baier, Wei Hua Wang, and Jürgen Eckert
Phys. Rev. Lett. 94, 205501 – Published 23 May 2005
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Abstract

Usually, monolithic bulk metallic glasses undergo inhomogeneous plastic deformation and exhibit poor ductility (<1%) at room temperature. We present a new class of bulk metallic glass, which exhibits high strength of up to 2265 MPa together with extensive “work hardening” and large ductility of 18%. Significant increase in the flow stress was observed during deformation. The “work-hardening” capability and ductility of this class of metallic glass is attributed to a unique structure correlated with atomic-scale inhomogeneity, leading to an inherent capability of extensive shear band formation, interactions, and multiplication of shear bands.

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  • Received 4 February 2005

DOI:https://doi.org/10.1103/PhysRevLett.94.205501

©2005 American Physical Society

Authors & Affiliations

Jayanta Das1,2, Mei Bo Tang3, Ki Buem Kim1, Ralf Theissmann4, Falko Baier1, Wei Hua Wang3, and Jürgen Eckert1,2

  • 1FG Physikalische Metallkunde, FB 11 Material- und Geowissenschaften, Technische Universität Darmstadt, Petersenstraße 23, D-64287 Darmstadt, Germany
  • 2Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Institut für Metallische Werkstoffe, Postfach 270016, D-01171 Dresden, Germany
  • 3Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 4FG Strukturforschung, FB 11 Material- und Geowissenschaften, Technische Universität Darmstadt, Petersenstraße 23, D-64287 Darmstadt, Germany

See Also

Amorphous Metallic Plastic

B. Zhang, D. Q. Zhao, M. X. Pan, W. H. Wang, and A. L. Greer
Phys. Rev. Lett. 94, 205502 (2005)

Glass-Like Metal Performs Better Under Stress

Davide Castelvecchi
Phys. Rev. Focus 15, 20 (2005)

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Issue

Vol. 94, Iss. 20 — 27 May 2005

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