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首页> 外文期刊>Journal of Materials Research >Enhancement of plasticity in Ti-rich Ti-Zr-Be-Cu-Ni-Ta bulk glassy alloy via introducing the structural inhomogeneity
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Enhancement of plasticity in Ti-rich Ti-Zr-Be-Cu-Ni-Ta bulk glassy alloy via introducing the structural inhomogeneity

机译:通过引入结构不均匀性提高富钛Ti-Zr-Be-Cu-Ni-Ta块状玻璃合金的可塑性

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摘要

The effect of microstructural inhomogeneities with different length scale on the plasticity of (Ti_(45)Zr_(16)Be_(20)Cu_(10)Ni_9)_(100-x)Ta_x (x = 0, 5, and 10) bulk glassy alloys has been studied. The formation of specific heterogeneous microstructures with a different type of structural inhomogeneity, i.e., short-/medium-range ordered clusters or micrometer-scale ductile dendrites combined with a glassy matrix, evolved by appropriately tuning the alloy chemistry, improves the room temperature plasticity up to ~12.5% and ~15%, respectively. The pronouncedly enhanced plasticity is mainly attributed to the retardation of shear localization and multiplication of shear bands by controlling the plastic and failure instabilities otherwise responsible for premature failure.
机译:不同长度尺度的微结构不均匀性对(Ti_(45)Zr_(16)Be_(20)Cu_(10)Ni_9)_(100-x)Ta_x(x = 0、5和10)块体可塑性的影响已经研究了玻璃状合金。通过适当调节合金化学性质形成具有不同类型结构不均匀性的特定异质微观结构,即短/中程有序簇或微米级延性树突与玻璃状基质结合形成,从而提高了室温可塑性分别达到〜12.5%和〜15%。明显增强的可塑性主要归因于通过控制塑性和破坏失稳(否则会导致过早破坏),剪切局部化的延迟和剪切带的增加。

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