Cryogenic static and dynamic deformation behavior of Zr-based bulk metallic glasses

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-05-24 DOI:10.1016/j.intermet.2025.108851

Zhenxiang Zhao , Chunyan Li , Tianyu Chen , Jianhui Liu , Xiaoqiang Fu , Shengzhong Kou , Xiaocheng Li , Yudian Ouyang , Jinfeng Kang

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引用次数: 0

Abstract

Stable extension of metallic glass shear bands is crucial for achieving excellent macroscopic plasticity, yet quantitatively establishing the relationship between metallic glass shear band behavior and macroscopic plasticity remains a significant challenge. This study, based on a series of cryogenic quasi-static and dynamic compressive tests, reveals that optimal cryogenic compression plastic strain of up to 21.1 % is attained at 143 K. Combined with molecular dynamics simulations, the reasons can be attributed to the combination of the local temperature rise resulting from the adiabatic shear and the enhancement of interatomic forces under cryogenic conditions. Notably, the attenuation of the serrated flow behavior under cryogenic conditions. Additionally, during dynamic loading at cryogenic temperatures, negative strain rate sensitivity is exhibited as the temperature decreases. These findings could contribute to enhancing the understanding of the temperature-dependent characteristics of plasticity and aid in the design of plasticity/strength for metallic glass at cryogenic temperatures.

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zr基大块金属玻璃的低温静态和动态变形行为

金属玻璃剪切带的稳定延伸是获得优异宏观塑性的关键，但定量建立金属玻璃剪切带行为与宏观塑性之间的关系仍然是一个重大挑战。本研究基于一系列低温准静态和动态压缩试验，结果表明，在143k下，低温压缩塑性应变可达到21.1%。结合分子动力学模拟，其原因可归结为绝热剪切引起的局部温升和低温条件下原子间作用力增强的共同作用。值得注意的是，在低温条件下，锯齿状流动行为的衰减。此外，在低温动加载过程中，随着温度的降低，表现出负应变率敏感性。这些发现有助于加深对塑性的温度依赖特性的理解，并有助于金属玻璃在低温下的塑性/强度设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.