The classic phenomenological models fail to describe the physical landscape of creep deformation for amorphous solids. In this paper, creep behavior of typical metallic glasses with chemical compositions La62Al14Ag2.34Ni10.83Co10.83, Pd20Pt20Cu20Ni20P20 and Cu46Zr39Hf8Al7 were studied. Instead, we attempt to use a modified hierarchically correlated model informed by physics to realize the creep behaviors of metallic glasses. The anelastic deformation of creep is categorized into two distinct components, i.e., the highly correlated deformation unit sensitive to annealing and the low correlated unit associated with diffusion relaxation. The correlated component diminishes with structural aging. The validity of the model is verified by these findings, and the derived parameters provide insights into the structural and kinetic characteristics of metallic glasses. Decreased characteristic times and contrasting correlation factors indicate homogeneous structure and lower energy states. Moreover, a qualitative evaluation of the relative strengths of the dual deformation mechanisms during creep enables the characterization of β relaxation forms, shedding light on the intrinsic attributes of different types of metallic glasses. This methodology additionally facilitates the detection of structural aging and rejuvenation phenomena.

中文翻译：

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关于金属玻璃结构演变的动力学


经典的现象学模型无法描述无定形固体蠕变变形的物理景观。本文研究了化学成分为 La62Al14Ag2.34Ni10.83Co10.83、Pd20Pt20Cu20Ni20P20 和 Cu46Zr39Hf8Al7 的典型金属玻璃的蠕变行为。相反，我们尝试使用由物理学告知的改进的分层相关模型来实现金属玻璃的蠕变行为。蠕变的非弹性变形分为两个不同的分量，即对退火敏感的高度相关变形单元和与扩散松弛相关的低相关单元。相关成分随着结构老化而减少。这些发现验证了模型的有效性，得出的参数为金属玻璃的结构和动力学特性提供了见解。特征时间减少和对比相关因子表明结构均匀和能量状态较低。此外，对蠕变过程中双重变形机制的相对强度的定性评估能够表征β弛豫形式，从而阐明不同类型金属玻璃的内在属性。这种方法还有助于检测结构老化和年轻化现象。