大块金属玻璃剪切带稳定性的拉压不对称性

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia Pub Date : 2025-04-07 DOI:10.1016/j.mtla.2025.102408

Ethen Thomas Lund , Sungwoo Sohn , Axel van de Walle , Stefano Curtarolo , Douglas Hofmann , Jan Schroers

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引用次数: 0

摘要

测量了zr基大块金属玻璃在压缩弯曲下的剪切带稳定性，并与之前的拉伸结果进行了比较。受压破坏是由梯形截面梁的弯曲引起的。这种表征是在多个温度下进行的，并与张力结果进行比较，揭示了剪切带稳定性的压缩-张力不对称性。稳定性，这里指的是抵抗灾难性剪切带的能力，而不是稳定的、被阻止的剪切带，在所有测量的有效温度下，压缩比拉伸更高。这种不对称性表明剪切带在拉伸和压缩时的传播是不同的，并提出了这种差异的可能机制。此外，这种稳定性测量结果在单轴压缩测试中是一致的，证明了它在预测大块金属玻璃在不同加载模式下的脆性和延性响应方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Tension-compression asymmetry of shear band stability in bulk metallic glasses

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Tension-compression asymmetry of shear band stability in bulk metallic glasses

Shear band stability is measured for a Zr-based bulk metallic glass in compressive bending and compared with previous results in tension. Compressive failure is induced via bending of trapezoidal cross-section beams. This characterization is done at multiple fictive temperatures and compared with results in tension, revealing a compression-tension asymmetry in shear banding stability. Stability, indicated here as the ability to resist catastrophic shear bands in favor of stable, arrested shear bands, is higher in compression than tension at all measured fictive temperatures. This asymmetry suggests that shear band propagation is different in tension and compression, and possible mechanisms underlying this difference are suggested. Additionally, this stability measurement is shown to be consistent in uniaxial compression testing, demonstrating its potential for predicting a brittle vs. ductile response in different loading modes of bulk metallic glasses.

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来源期刊

Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.40

自引率

2.90%

发文量

345

审稿时长

36 days

期刊介绍： Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).