Abstract

This alloy is shown to be homogeneous (Ti 65%, Nb 20%, Ta 10%, Zr 5%). A change in the elemental composition is observed only in the layer close to the surface with a thickness of about 100 nm. The alloy surface is depleted in titanium (∼20%) and enriched in tantalum (∼20%). There is also a large amount of oxides on the surface (∼50%). The alloy is single-phase with a β-Ti-type crystal lattice (cubic system, space group Im3m). The alloy has yield strength of about 550 MPa and a tensile strength of about 700 MPa. The Young’s modulus is about 50 GPa. The relative elongation of the alloy is about 1.4%. On a microscale, folds and longitudinal comb-like structures up to 0.5 μm in height are found on the surface of wires and plates made of the Ti–20Nb–10Ta–5Zr alloy. When analyzing nanotopology, it is found that, even between comb-like structures or at their tops, there are irregularities up to 100–150 nm in height.

中文翻译：

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一种表面微纳米结构的β Ti-20Nb-10Ta-5Zr合金

摘要

该合金被证明是均质的（Ti 65%、Nb 20%、Ta 10%、Zr 5%）。仅在接近表面的层中观察到元素组成的变化，厚度约为 100 nm。合金表面贫钛（~20%）和富钽（~20%）。表面也有大量的氧化物（~50%）。该合金为单相，具有β-Ti型晶格（立方系统，空间群Im3m）。该合金具有约550 MPa的屈服强度和约700 MPa的抗拉强度。杨氏模量约为 50 GPa。合金的相对伸长率约为1.4%。在微观尺度上，在由 Ti-20Nb-10Ta-5Zr 合金制成的线材和板的表面上发现了高达 0.5 μm 的折叠和纵向梳状结构。在分析纳米拓扑时，发现即使在梳状结构之间或在它们的顶部，也存在高度高达 100-150 nm 的不规则性。