New ductile laminate structure of Ti-alloy/Ti-based metallic glass composite with high specific strength. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Li, D.; Zhu, Z.W.; Wang, A.M.; Fu, H.M.; Li, H.; Zhang, H.W.; Zhang, H.F.
• Is Part Of: Journal of materials science & technology. Volume 34:Issue 4(2018)
• Page Start: 708
• Page End: 712
• Publication Date: 2018-04
• Subjects: Laminate composite -- Metallic glass -- Specific strength -- Plasticity; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2017.07.008
• Languages: English
• ISSNs: 1005-0302

Abstract

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 × 10 3 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.