Fe-based bulk metallic glasses (BMGs) often show an extremely poor plastic deformation ability at room temperature, which seriously restricted their wide application. In this work, a series of in-situ (Fe₇₇Mo₅P₉C_7.5B1.5)_100−xCu_x (x = 0, 0.1, 0.3, 0.5, 0.7, 1 at%) BMG matrix composites were successfully developed by low purity industrial raw materials using copper mold casting. An (Fe₇₇Mo₅P₉C_7.5B1.5)_99.9Cu_0.1 BMG matrix composite reinforced by the dual heterogeneous structure with micro/nano α-Fe exhibits the highest ever reported compressive plasticity of ~ 6.6% during the testing rod with a diameter of 1.5 mm. The origin of a large plasticity of this Fe-based BMG composite has been discussed according to the initiation of the shear bands and the instability of the shear banding.

铁基块状金属玻璃（BMG）通常在室温下表现出极差的塑性变形能力，从而严重限制了其广泛应用。在这项工作中，成功完成了一系列原位（Fe ₇₇ Mo ₅ P ₉ C _7.5 B1.5）_100-x Cu _x（x = 0，0.1，0.3，0.5，0.7，1 at％）BMG基复合材料由低纯度工业原料开发而成，采用铜铸模铸造。An（铁₇₇ Mo ₅ P ₉ C _7.5 B1.5）_99.9铜_0.1由微米/纳米α-Fe双重异质结构增强的BMG基复合材料在直径为1.5 mm的测试棒中显示出迄今为止最高的〜6.6％的压缩可塑性。根据剪切带的起因和剪切带的不稳定性，讨论了这种铁基BMG复合材料具有较大塑性的原因。