New ductile laminate structure of Ti-alloy/Ti-based metallic glass composite with high specific strength

作     者：D.Li Z.W.Zhu A.M.Wang H.M.Fu H.Li H.W.Zhang H.F.Zhang 

作者机构：Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2018年第34卷第4期

页      面：708-712页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China (Nos. 51434008 (U1435204) and 51531005) the China’s Manned Space Station Project (No. TGJZ800-2-RW024) Science and Technology Planning Project of Guangdong Province, China (Nos. 2015B090926001 and 2015B010122001) the Youth Innovation Promotion Association CAS Shuangchuang Project of Jiangsu Province, China 

主　　题：Laminate composite Metallic glass Specific strength Plasticity 

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 （-1618MPa）, plasticity （-4.3%） and specific fracture strength （384 × 10^3 N m kg^-1 ） in compression. The maintained yield strength results from the unique microstruc- ture 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 plastic- ity. 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.