Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 483, Issue -, Pages 94-98Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2018.01.006
Keywords
Bulk metallic glass composites; Doping element; Mechanical properties; Martensitic transformation
Funding
- National Natural Science Foundation of China (NSFC) [51571106, 51671070, 51371065]
- Natural Science Foundation of Liaoning Province [2015020244]
- Program for Liaoning Excellent Talents in University [LJQ2014064]
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The dependence of microstructure and mechanical properties on alloy composition of a series of Cu48Zr48-xAl4Nbx (x = 0, 0.3, 0.8, 1.2, 1.5, 2.0 at.%) bulk metallic glass composites (BMGCs) was studied in detail. It was found that the doping element Nb exerts a crucial role on the mechanical properties of the studied BMGCs. By adjusting Nb content, a BMGC possessing an excellent combination of high strength (similar to 1.3 GPa) and significant tensile plasticity (similar to 8%) was obtained. Such superior mechanical performance can be attributed to the formation of multiple shear bands and the deformation-induced martensitic transformation from a cubic primitive B2 phase to a monoclinic B19' phase.
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