Fe微合金化对Cu-Zr-Al非晶合金塑性变形行为的影响及其机理

用铜模喷铸法制备Cu_(47.8－x)Zr_46.2Al₆Fe_x(x=0, 0.8, 1.2, 1.6)系列合金，研究了Fe微合金化对其非晶形成能力和力学性能的影响。结果表明：随着微量元素Fe含量的提高合金的玻璃形成能力降低，而其室温塑性变形能力明显提高；随着Fe含量的提高基体中产生了更多的自由体积，且Fe与Cu的正混合焓使基体中成分/自由体积分布的不均匀性提高。这些因素，使高Fe含量的非晶合金具有更高的塑性变形能力。

Effect of Fe Microalloying on Plastic Deformation Behavior of Cu-Zr-Al Metallic Glasses

Cu_(47.8－x)Zr_46.2Al₆Fe_x (x=0, 0.8, 1.2, 1.6) alloy were prepared by copper-mold injection casting method and the effect of Fe microalloying on the glass-forming ability and mechanical properties of Cu_(47.8－x)Zr_46.2Al₆Fe_x (x=0, 0.8, 1.2, 1.6) metallic glasses were investigated. The results show that the glass-forming ability of the alloy decreases with increasing of Fe content, while the plastic deformation ability at room temperature increases obviously. It is found that with the increase of minor Fe content more free volume will be introduced into the glassy matrix, and the inhomogeneity of composition and free volume distribution in the matrix will increase as a result of the positive mixing enthalpy of Fe and Cu. These factors jointly result in enhanced plasticity of metallic glass with high Fe content.