Metallic glasses (MGs), a metastable material far from equilibrium, exhibit intricate dynamic relaxation behaviors. The challenge lies in developing a model that accurately describes the dynamics and deformation mechanisms of MG. This paper introduces a model integrating dynamic relaxation with deformation behavior. Validation through dynamic mechanical analysis, stress relaxation, creep, and strain recovery tests confirm the existence of four deformation modes: elasticity, anelasticity from β relaxation, anelasticity from α relaxation at low temperatures, and viscoplasticity from α relaxation at high temperatures. The model captures all of these deformation modes. The dynamical mechanical spectrum and stress relaxation spectrum unveil dynamic features during glass to liquid transition, and a simple and effective experimental method was developed for identifying ultra-low-frequency dynamic relaxation. This work provides new perspectives on the study of relaxation dynamics in glassy states and establishes important connections between dynamic relaxation behavior and deformation mechanisms. These findings lay a theoretical and experimental foundation for the broad application of MGs.

中文翻译：

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金属玻璃中的动态松弛与非弹性变形的积分：理论见解和实验验证


金属玻璃 （MG） 是一种远离平衡的亚稳态材料，表现出复杂的动态弛豫行为。挑战在于开发一个准确描述 MG 动力学和变形机制的模型。本文介绍了一个将动态松弛与变形行为相结合的模型。通过动态力学分析、应力松弛、蠕变和应变恢复测试进行的验证证实了四种变形模式的存在：弹性、β松弛引起的无弹性、低温下α松弛引起的无弹性以及高温下α松弛引起的粘塑性。该模型捕获了所有这些变形模式。动力学力学谱和应力弛豫谱揭示了玻璃-液体转变过程中的动力学特征，并开发了一种简单有效的实验方法来识别超低频动态弛豫。这项工作为玻璃态下弛豫动力学的研究提供了新的视角，并建立了动态弛豫行为和变形机制之间的重要联系。这些发现为 MGs 的广泛应用奠定了理论和实验基础。