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Size Effect Suppresses Brittle Failure in Hollow Cu60Zr40 Metallic Glass Nanolattices Deformed at Cryogenic Temperatures

机译:尺寸效应抑制在低温下变形的中空Cu60Zr40金属玻璃纳米晶格的脆性破坏

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摘要

To harness "smaller is more ductile" behavior emergent at nanoscale and to proliferate it onto materials with macroscale dimensions, we 140 produced hollow-tube Cu60Zr40 metallic glass nanolattices with the layer thicknesses of 120, 60, and 20 nm. They exhibit unique transitions in deformation mode with tube-wall thickness and temperature. Molecular dynamics simulations and analytical models were used to interpret these unique transitions in terms of size effects on the plasticity of metallic glasses and elastic instability.
机译:为了利用在纳米级出现的“更小,更具延展性”的行为并将其扩散到具有宏观尺寸的材料上,我们140生产了中空管Cu60Zr40金属玻璃纳米晶格,层厚度为120、60和20 nm。它们在变形模式下随管壁厚度和温度表现出独特的转变。分子动力学模拟和分析模型用于解释尺寸变化对金属玻璃可塑性和弹性不稳定性的影响。

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