Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe和Ti–6Al–4V钛合金在NaNO<sub>3</sub>溶液中的电化学行为

刘嘉; 段双陆; 岳小康; 曲宁松

doi:10.1007/s12613-023-2762-y

Volume 31 Issue 4

Apr. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(4): 750-763

Jia Liu, Shuanglu Duan, Xiaokang Yue, and Ningsong Qu, Comparison of electrochemical behaviors of Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe and Ti–6Al–4V titanium alloys in NaNO₃ solution, Int. J. Miner. Metall. Mater., 31(2024), No. 4, pp. 750-763. https://doi.org/10.1007/s12613-023-2762-y

Cite this article as:

Jia Liu, Shuanglu Duan, Xiaokang Yue, and Ningsong Qu, Comparison of electrochemical behaviors of Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe and Ti–6Al–4V titanium alloys in NaNO3 solution, Int. J. Miner. Metall. Mater., 31(2024), No. 4, pp. 750-763. https://doi.org/10.1007/s12613-023-2762-y

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研究论文

Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe和Ti–6Al–4V钛合金在NaNO₃溶液中的电化学行为

南京航空航天大学机电学院, 南京 210016, 中国

通讯作者:
刘嘉 E-mail: meejliu@nuaa.edu.cn

文章亮点

(1) 系统地研究了Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe和Ti–6Al–4V两种钛合金微观组织对电化学行为的影响机制。

(2) 揭示了Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe和Ti–6Al–4V两种钛合金在NaNO₃溶液中的材料溶解机理。

(3) 开发了电化学溶解模型来表征两种钛合金在不同电流密度下的电化学溶解行为。

中文摘要

Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe（β-CEZ）合金因其优异的强度和耐腐蚀性而被认为是航空工业潜在的结构材料。电解加工（ECM）是一种高效、低成本的β-CEZ合金制造技术。在电解加工中，加工参数选择和刀具设计基于材料的电化学溶解行为。本研究讨论了β-CEZ和Ti–6Al–4V (TC4) 合金在NaNO₃溶液中的电化学溶解行为。分析了β-CEZ和TC4合金的开路电位（OCP）、塔菲尔极化、动电位极化、电化学阻抗谱（EIS）和电流效率曲线。结果表明，与TC4合金相比，β-CEZ合金的钝化膜结构更致密，溶解过程中的电荷转移阻力更大。此外，还分析了两种钛合金在不同电流密度下的溶解表面形貌。在低电流密度下，β-CEZ合金表面包含点蚀坑和溶解产物，而TC4合金表面为多孔蜂窝状结构。在高电流密度下，两种合金的表面波纹度均得到改善，TC4合金表面比β-CEZ合金表面更平坦、更光滑。最后，还提出了β-CEZ和TC4合金的电化学溶解模型。

关键词:

Research Article

Comparison of electrochemical behaviors of Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe and Ti–6Al–4V titanium alloys in NaNO₃ solution

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Abstract

Abstract

The Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe (β-CEZ) alloy is considered as a potential structural material in the aviation industry due to its outstanding strength and corrosion resistance. Electrochemical machining (ECM) is an efficient and low-cost technology for manufacturing the β-CEZ alloy. In ECM, the machining parameter selection and tool design are based on the electrochemical dissolution behavior of the materials. In this study, the electrochemical dissolution behaviors of the β-CEZ and Ti–6Al–4V (TC4) alloys in NaNO₃ solution are discussed. The open circuit potential (OCP), Tafel polarization, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and current efficiency curves of the β-CEZ and TC4 alloys are analyzed. The results show that, compared to the TC4 alloy, the passivation film structure is denser and the charge transfer resistance in the dissolution process is greater for the β-CEZ alloy. Moreover, the dissolved surface morphology of the two titanium-based alloys under different current densities are analyzed. Under low current densities, the β-CEZ alloy surface comprises dissolution pits and dissolved products, while the TC4 alloy surface comprises a porous honeycomb structure. Under high current densities, the surface waviness of both the alloys improves and the TC4 alloy surface is flatter and smoother than the β-CEZ alloy surface. Finally, the electrochemical dissolution models of β-CEZ and TC4 alloys are proposed.
- electrochemical machining;
- dissolution behavior;
- β-CEZ titanium alloy;
- polarization curve;
- current efficiency

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Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe和Ti–6Al–4V钛合金在NaNO₃溶液中的电化学行为

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Comparison of electrochemical behaviors of Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe and Ti–6Al–4V titanium alloys in NaNO₃ solution

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Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe和Ti–6Al–4V钛合金在NaNO3溶液中的电化学行为

文章亮点

中文摘要

Comparison of electrochemical behaviors of Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe and Ti–6Al–4V titanium alloys in NaNO3 solution

Abstract

References

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Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe和Ti–6Al–4V钛合金在NaNO₃溶液中的电化学行为

Comparison of electrochemical behaviors of Ti–5Al–2Sn–4Zr–4Mo–2Cr–1Fe and Ti–6Al–4V titanium alloys in NaNO₃ solution