论文标题
多组分金属眼镜的屈服：弹性模量异质性的通用特征
Yielding in multi-component metallic glasses: Universal signatures of elastic modulus heterogeneities
论文作者
论文摘要
剪切的多组分大量金属玻璃的特征是定义其性质的化学和结构障碍。我们研究了六个基于Ni的多组分玻璃中局部微结构弹性模量在整个塑料产量过渡中的行为，这些玻璃的特征在于通常与实心溶液形成性相关的组成特征。我们发现，弹性模量波动表现出一致的渗透特征，指向化学成分跨化学成分的普遍行为以及整体屈服的清晰度特征。弹性异质性在剪切中通过在原本刚性的无定形基质中渗透柔软的簇渗透而生长，从而证实了先前在颗粒培养基和胶体玻璃杯中进行的研究。我们发现，渗透过渡的明确特征具有跨越簇，这些簇的特征是没有比例的特征和临界缩放指数。空间相关长度和平均簇大小在产量之前倾向于发散，相关的关键指数对组成变化以及宏观应力 - 应变曲线的细节表现出相当弱的依赖性。
Sheared multi-component bulk metallic glasses are characterized by both chemical and structural disorder that define their properties. We investigate the behavior of the local, microstructural elastic modulus across the plastic yielding transition in six Ni-based multi-component glasses, that are characterized by compositional features commonly associated with solid solution formability. We find that elastic modulus fluctuations display consistent percolation characteristics pointing towards universal behavior across chemical compositions and overall yielding sharpness characteristics. Elastic heterogeneity grows upon shearing via the percolation of elastically soft clusters within an otherwise rigid amorphous matrix, confirming prior investigations in granular media and colloidal glasses. We find clear signatures of percolation transition with spanning clusters that are universally characterized by scale-free characteristics and critical scaling exponents. The spatial correlation length and mean cluster size tend to diverge prior to yielding, with associated critical exponents that exhibit fairly weak dependence on compositional variations as well as macroscopic stress-strain curve details.
