New ductile laminate structure of Ti-alloy/Ti-based metallic glass composite with high specific strength
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第4期
论文作者：D.Li Z.W.Zhu A.M.Wang H.M.Fu H.Li H.W.Zhang H.F.Zhang
文章页码：708 - 712
摘 要：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 Nmkg-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.
D.Li，Z.W.Zhu，A.M.Wang，H.M.Fu，H.Li，H.W.Zhang，H.F.Zhang
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
摘 要：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 Nmkg-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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