Thermodynamic Origins of Shear Band Formation and the Universal Scaling Law of Metallic Glass Strength
Thermodynamic Origins of Shear Band Formation and the Universal Scaling Law of Metallic Glass Strength
复制标题
剪切带形成的热力学起源和金属玻璃强度的普遍缩放定律
DOI：
10.1103/physrevlett.103.065504
复制
发表时间：
2009-08-07
影响因子：
8.6
通讯作者：
Chen, M. W.
中科院分区：
文献类型：
--
作者：
Liu, Y. H.;Liu, C. T.;Chen, M. W.
本文提出了一个普适的标度律τ（y）=3R（T-g-RT）/V，揭示了屈服强度τ（y）与金属玻璃的玻璃化转变温度T-g和摩尔体积V之间的内在关系。该方程是从热力学基础推导出来的，并通过各种金属玻璃的屈服行为得到了验证。τ（y）和Tg之间的线性关系表明屈服和玻璃-液体转变之间的内在相关性，这有助于对玻璃合金的强度和变形的基本理解。
We report a universal scaling law, tau(y)=3R(T-g-RT)/V, that uncovers an inherent relationship of the yield strength tau(y) with the glass transition temperature T-g and molar volume V of metallic glasses. This equation is derived from fundamental thermodynamics and validated by various metallic glasses with well-defined yielding. The linearity between tau(y) and T-g demonstrates the intrinsic correlation between yielding and glass-liquid transition, which contributes to the basic understanding of the strength and deformation of glassy alloys.