Phys. Rev. Lett. 94, 205501 (2005) [4 pages]

“Work-Hardenable” Ductile Bulk Metallic Glass

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Jayanta Das^1,2, Mei Bo Tang³, Ki Buem Kim¹, Ralf Theissmann⁴, Falko Baier¹, Wei Hua Wang³, and Jürgen Eckert^1,2
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

Received 4 February 2005; published 23 May 2005

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.

URL: http://link.aps.org/doi/10.1103/PhysRevLett.94.205501
DOI: 10.1103/PhysRevLett.94.205501
PACS: 81.05.Kf, 62.20.Fe, 81.05.Zx, 81.40.Ef

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Phys. Rev. Lett. 94, 205501 (2005) [4 pages]

“Work-Hardenable” Ductile Bulk Metallic Glass

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