Phys. Rev. Lett. 94, 205501 (2005) [4 pages]“Work-Hardenable” Ductile Bulk Metallic Glass
Jayanta Das1,2, Mei Bo Tang3, Ki Buem Kim1, Ralf Theissmann4, Falko Baier1, Wei Hua Wang3, and Jürgen Eckert1,2 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. ©2005 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.94.205501 See AlsoFocus Story: Phys. Rev. Focus 15, story 20 [ Abstract | Previous article | Next article | Issue 20 ] |
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