New ductile laminate structure of Ti-alloy/Ti-based metallic glass composite with high specific strength |
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Authors: | D Li ZW Zhu AM Wang HM Fu H Li HW Zhang HF Zhang |
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Affiliation: | Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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Abstract: | Bulk laminate structure of Ti-alloy/Ti-based metallic glass composite (MGC) was prepared by melting a preform of alternate stack-up foils in the high vacuum atmosphere. The composite demonstrates a good combination of yield strength (~1618 MPa), plasticity (~4.3%) and specific fracture strength (384 × 103 N m kg?1) in compression. The maintained yield strength results from the unique microstructure composed of the Ti layer, the solution layer with gradient structure and the MGC layer. Such a multilayer structure effectively inhibits the propagation of shear band, leading to the enhanced plasticity. Those extraordinary properities suggest that combining ductile lamella with brittle metallic glass (MG) by such a lay-up method can be an effective way to improve mechanical properties of MG. |
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Keywords: | Laminate composite Metallic glass Specific strength Plasticity |
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