Selective laser melting of ductile Cu particles reinforced Fe-based bulk metallic glass composites (Fe-based BMGCs) were used to break geometric complexity limitations and improve the mechanical properties. In this work, the effects of Cu content on microstructure, mechanical properties and fracture deformation behavior of Fe-based BMCGs were systematically investigated. The appropriate Cu addition can decrease stress concentration by altering elements distribution, especially C element which will increase the brittleness of BMGs and lead to crack formation. The crack-free Fe-based BMGCs with a well bonding interface between the secondary phase and matrix is presented with 40 vol.% Cu addition. The improved plasticity of BMGCs with Cu addition originates from the inhibition of shear bands via formation of multiple shear bands. This work demonstrates that introducing tough secondary phase into BMGs is an effective method to improve their formability and performance.

选择性激光熔化的延展性铜粒子增强的铁基块状金属玻璃复合材料（铁基BMGCs）用于突破几何复杂性限制并改善机械性能。在这项工作中，系统地研究了铜含量对铁基BMCGs的组织，力学性能和断裂变形行为的影响。适当添加铜可以通过改变元素分布，特别是碳元素来降低应力集中，碳元素会增加BMG的脆性并导致裂纹形成。提出了在第二相和基体之间具有良好粘结界面的无裂纹的铁基BMGC，其中添加了40％（体积）的Cu。添加铜的BMGC的可塑性提高源自通过形成多个剪切带来抑制剪切带。