Liu Y H, Liu C T, Wang W H, Inoue A, Sakurai T, Chen M W
WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
Phys Rev Lett. 2009 Aug 7;103(6):065504. doi: 10.1103/PhysRevLett.103.065504.
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.
我们报告了一个通用标度律，即τ_y = 3R(T_g - RT)/V，它揭示了屈服强度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。该方程由基本热力学推导得出，并通过各种具有明确屈服行为的金属玻璃进行了验证。τ_y与T_g之间的线性关系表明了屈服与玻璃-液体转变之间的内在关联，这有助于对玻璃态合金的强度和变形有基本的理解。
