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As-cast Zr–Ni–Cu–Al–Nb bulk metallic glasses containing nanocrystalline particles with ductility by Cang Fan; Dongchun Qiao; T.W. Wilson; Hahn Choo; Peter K. Liaw is a Engineering article available to read on EtoBox.

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Bulk metallic glasses (BMGs) exhibit inhomogeneous deformation under loading at room temperature due to the formation of highly localized shear bands, which leads to a catastrophic failure. We present recent advances in the processing technique, and in the further understanding of the relationship between the microstructure and mechanical behavior of Zr-based BMG composites (BMGCs). By adding Nb to Zr-Ni-Cu-Al, nanocrystalline-particle-containing BMGCs were synthesized in an as-cast condition without subsequent heat treatments. High-resolution transmission electron microscopy results show that the addition of 2 atomic percent (at.%) Nb introduces nanocrystals with an average size in the range of 1-3 nm. Differential-scanning calorimetry and differential-thermal analyses indicate that the glass-forming ability increased after adding Nb. The compressive plasticity of the Nb-containing BMGC at room temperature is significantly improved (about 3%), when compared to the monolithic BMGs (about 0.1-0.3%) with an increase in the compressive strength from 1820 to 1860 MPa.

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Author

Cang Fan; Dongchun Qiao; T.W. Wilson; Hahn Choo; Peter K. Liaw

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-5093)

Published

2006

Language

EN

Field

Engineering (Physical Sciences)