论文标题
少量合金在散装金属眼镜的可塑性中的作用
The role of minor alloying in the plasticity of bulk metallic glasses
论文作者
论文摘要
金属眼镜的微型或次要合金具有技术意义。 Fe或Co的添加方法是极端的，在CO或CONTED上进行了抗fe型，最初是基于延展的基于PD的总体金属玻璃（PD $ _ {40} $ Ni $ _ {40} $ P $ _ {20} $）通过Fe或Co的添加选择性地操纵。合金或Co的添加极端效果是极端的，在对CO造成的fe型或直接施用后，在测试后表现出了任何特殊的降水液或3点验证或3点均可进行的。使用可变分辨率波动电子显微镜（VR-FEM），在变形前表征了无定形结构。我们观察到延展性金属玻璃与易MRO的明显差异，延性玻璃表现出丰富的结构多样性和MRO相关长度，最高可达6 nm。 MRO异质性似乎可以使剪切带更轻松，从而增强了变形。
Micro- or minor alloying of metallic glasses is of technological interest. An originally ductile Pd-based monolithic bulk metallic glass (Pd$_{40}$Ni$_{40}$P$_{20}$) was selectively manipulated by additions of Fe or Co. The alloying effects were extreme, showing either exceptional ductility upon Co addition or immediate catastrophic failure upon Fe addition when tested under uniaxial compression or 3-point bending. The amorphous structure was characterized prior to deformation with respect to its medium-range order (MRO) using variable resolution fluctuation electron microscopy (VR-FEM). We observe striking differences in the MRO between the ductile and brittle metallic glasses, with the ductile glasses exhibiting a rich structural diversity and MRO correlation lengths up to 6 nm. The MRO heterogeneity seems to enable easier shear banding and hence enhance the deformability.
