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Improving the strength and the toughness of Mg-based bulk metallic glass by Bridgman solidification

Authors
Journal
Materials Science and Engineering A
0921-5093
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/j.msea.2012.11.111
Keywords
  • Bulk Metallic Glass
  • Composites
  • Bridgman Solidification
  • Plasticity

Abstract

Abstract The Mg-based bulk metallic glass composites with a composition of Mg75Cu13.33Y6.67Zn5 were synthesized by the copper-mould casting and the Bridgman solidification. Well-developed and homogeneously-distributed flake-shape precipitates were obtained in the in situ bulk metallic glass matrix composites by the Bridgman solidification. The glass composite obtained exhibits the ultimate strength of 1037MPa and fracture plastic strain of 19% of the composite, which is attributed to the homogeneous dispersion of ductile phase in the glass matrix. As compared to the copper-mould casting method, the Bridgman solidification is more effective to generate the homogeneous in situ Mg-based bulk metallic glass composites.

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