Duan Y J, Zhang L T, Qiao J C, Wang Yun-Jiang, Yang Y, Wada T, Kato H, Pelletier J M, Pineda E, Crespo D
School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710072, China.
Department of Physics, Institute of Energy Technologies, Universitat Politècnica de Catalunya, Barcelona 08019, Spain.
Phys Rev Lett. 2022 Oct 21;129(17):175501. doi: 10.1103/PhysRevLett.129.175501.
Lacking the structural information of crystalline solids, the origin of the relaxation dynamics of metallic glasses is unclear. Here, we report the evolution of stress relaxation of high-entropy metallic glasses with distinct β relaxation behavior. The fraction of liquidlike zones, determined at each temperature by the intensity of stress decay, is shown to be directly related to both the aging process and the spectrum of relaxation modes obtained by mechanical spectroscopy. The results shed light on the intrinsic correlation between the static and dynamic mechanical response in high-entropy and conventional metallic glasses, pointing toward a sluggish diffusion high-entropy effect in the liquid dynamics.
由于缺乏晶体固体的结构信息，金属玻璃弛豫动力学的起源尚不清楚。在此，我们报道了具有不同β弛豫行为的高熵金属玻璃应力弛豫的演变。通过应力衰减强度在每个温度下确定的类液区分数，被证明与老化过程以及通过机械光谱学获得的弛豫模式谱直接相关。这些结果揭示了高熵和传统金属玻璃中静态和动态力学响应之间的内在关联，指向液体动力学中缓慢扩散的高熵效应。
