Abstract Serration and noise behaviors in plastically deforming solids are related to avalanches of deformation processes. In the stress-strain curves, the serration characteristics are visible as stress drops or strain jumps. In fact, similar serration characteristics are ubiquitous in many structural and functional materials, such as amorphous materials [also metallic glasses, or bulk metallic glasses (BMGs)], high-entropy alloys (HEAs), superalloys, ordered intermetallics, shape-memory alloys (SMAs), electrochemical noise, carbon steels, twinning-induced plasticity steels (TWIP steels), phase-transformation-induced plasticity steels (TRIP steels), Al-Mg alloys, nano-materials, magnetic functional materials, and so on. Because of their unique and universal properties, many researchers have focused on this field to find out what causes the serration behaviors and what can be learned about the material from the serration characteristics. For example, the serration characteristics contain information about the mechanisms of plastic deformation and the structural evolution during deformation. However, due to many factors affecting the serration behavior and some uncertain or uncontrolled factors, it’s a difficult task to give a unified picture of a vast amount of serration data. This review article summarizes the results of previous studies in this rapidly-developing field, attempting to provide a new perspective in expounding the connection between macroscopic properties and micro-mechanisms. In this review paper, serration behavior of a wide range of materials will be discussed. One of the most important goals is to investigate the factors influencing serration characteristics and deformation mechanisms. Several statistical properties, such as distributions of stress drop sizes and waiting times, are reviewed and used to quantify the serration behavior. Moreover, models and theories on the serrated flow will be discussed, which quantify the deformation mechanism and provide physical intuition for the experiments, and methods to organize experimental data. Besides discussing serrations in stress-strain curves of many solid materials, this review paper will also cover other systems with serrations and collective noise, such as crackling noise in the earth’s crust (earthquakes), volume fluctuations in a granular medium and jamming behavior in random-packing systems.

中文翻译：

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材料中的锯齿和噪声行为

摘要 塑性变形固体中的锯齿和噪声行为与变形过程的雪崩有关。在应力-应变曲线中，锯齿特征在应力下降或应变跳跃时可见。事实上，类似的锯齿特征在许多结构和功能材料中无处不在，例如非晶材料[也称为金属玻璃或块状金属玻璃 (BMG)]、高熵合金 (HEA)、高温合金、有序金属间化合物、形状记忆合金（SMAs）、电化学噪声、碳钢、孪生诱导塑性钢（TWIP钢）、相变诱导塑性钢（TRIP钢）、铝镁合金、纳米材料、磁功能材料等。由于它们独特而普遍的特性，许多研究人员专注于该领域，以找出导致锯齿行为的原因以及从锯齿特性中可以了解材料的信息。例如，锯齿特征包含有关塑性变形机制和变形过程中结构演变的信息。但是，由于影响锯齿行为的因素很多，并且存在一些不确定或不受控制的因素，因此很难对海量的锯齿数据进行统一描述。这篇综述文章总结了这一快速发展领域的前人研究成果，试图为阐述宏观特性与微观机制之间的联系提供一个新的视角。在这篇评论论文中，将讨论各种材料的锯齿行为。最重要的目标之一是研究影响锯齿特性和变形机制的因素。一些统计特性，如应力降大小和等待时间的分布，被审查并用于量化锯齿行为。此外，还将讨论有关锯齿状流动的模型和理论，这些模型和理论可以量化变形机制并为实验提供物理直觉，以及组织实验数据的方法。除了讨论许多固体材料的应力-应变曲线中的锯齿外，本综述还将涵盖其他具有锯齿和集体噪声的系统，例如地壳中的噼啪声（地震）、颗粒介质中的体积波动和随机干扰行为。 - 包装系统。