电子束双线自由成形原位合成TA1/Ti64新合金电化学腐蚀行为研究

doi:10.3901/JME.260219

机械工程学报 ›› 2026, Vol. 62 ›› Issue (12): 181-192.doi: 10.3901/JME.260219

• 材料科学与工程 • 上一篇

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电子束双线自由成形原位合成TA1/Ti64新合金电化学腐蚀行为研究

李鹏飞¹, 沈毅鸣¹, 李亮亮², 王长雨¹, 黄宁², 刘丽萍³, 沈春根¹, 鲁金忠¹

1. 江苏大学机械工程学院镇江 212013;
2. 沈阳飞机工业(集团)有限公司创新研究院沈阳 110000;
3. 国防科技大学电子对抗学院合肥 230037

收稿日期:2025-08-10 修回日期:2026-03-12 发布日期:2026-08-03
作者简介:李鹏飞，男，1991年出生，博士，副教授，硕士研究生导师。主要研究方向为激光加工、增材制造、钛合金及复合材料加工。E-mail:pengfeili@ujs.edu.cn
基金资助:
国家自然科学基金(52305363，12104508)和中国博士后科学基金(2024M760714)资助项目。

Study on the Electrochemical Corrosion Behavior of In Situ Synthesized TA1/Ti64 New Alloy through Dual-wire Electron Beam Freedom Fabrication

LI Pengfei¹, SHEN Yiming¹, LI Liangliang², WANG Changyu¹, HUANG Ning², LIU Liping³, SHEN Chungen¹, LU Jinzhong¹

1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013;
2. Innovation Research Institute, Shenyang Aircraft Corporation, Shenyang 110000;
3. College of Electronic Engineering, National University of Defense Technology, Hefei 230037

Received:2025-08-10 Revised:2026-03-12 Published:2026-08-03

摘要/Abstract

摘要： 针对Ti64钛合金在海洋环境中耐腐蚀性不足的问题，研究通过成分设计与微观组织调控，开发一种新型高耐蚀钛合金。采用电子束双线自由成形技术(Dual wire electron beam freeform fabrication，EBF3)，以TA1和Ti64为原料制备了新型TA1/Ti64合金，系统探讨其在3.5 wt% NaCl溶液中的电化学腐蚀行为及相关机理。结果显示，不同成形方向显著影响合金的微观结构：水平沉积样品中生成了细小的层状α相，而垂直样品则形成由网状β相与α相构成的复合组织。与常规Ti64合金相比，新型合金表现出显著的晶粒细化效果，其中垂直样品晶粒细化率达23.1%，水平样品更达到30.5%。这一微观组织的优化直接提升了材料的耐腐蚀性能。电化学测试表明，水平样品的腐蚀电流密度较Ti64降低38.1%，垂直样品亦下降7.5%；同时，水平与垂直样品的点蚀电位分别提高了14.2%和8.9%，抗局部腐蚀能力显著增强。研究结果为海洋环境下高性能钛合金的开发提供了新途径。

关键词: 电子束双线自由成形, 钛合金, 电化学, 腐蚀性能

Abstract: To address the insufficient corrosion resistance of Ti64 titanium alloy in marine environments, this study develops a novel high-corrosion-resistant titanium alloy through compositional design and microstructural control. Utilizing the Dual Wire Electron Beam Freeform Fabrication (EBF3) technique, a new TA1/Ti64 alloy is prepared using TA1 and Ti64 as raw materials, systematically investigating its electrochemical corrosion behavior and related mechanisms in a 3.5 wt% NaCl solution. The results indicate that the forming direction significantly influences the microstructure of the alloy：the horizontally deposited samples exhibit fine layered α-phase, while the vertically deposited samples form a composite structure consisting of a network of β-phase and α-phase. Compared to conventional Ti64 alloy, the novel alloy demonstrates a remarkable grain refinement effect, with a grain refinement rate of 23.1% for the vertical samples and as high as 30.5% for the horizontal samples. This optimization of microstructure directly enhances the corrosion resistance of the material. Electrochemical tests reveal that the corrosion current density of the horizontal samples is reduced by 38.1% compared to Ti64, while the vertical samples show a decrease of 7.5%. The pitting potentials of the horizontal and vertical samples are increased by 14.2% and 8.9%, significantly enhancing their resistance to localized corrosion. The findings of this study provide a new avenue for the development of high-performance titanium alloys for marine environments.

Key words: dual-wire electron beam freedom fabrication, titanium alloys, electrochemistry, corrosion resistance

中图分类号:

TG162

李鹏飞, 沈毅鸣, 李亮亮, 王长雨, 黄宁, 刘丽萍, 沈春根, 鲁金忠. 电子束双线自由成形原位合成TA1/Ti64新合金电化学腐蚀行为研究[J]. 机械工程学报, 2026, 62(12): 181-192.

LI Pengfei, SHEN Yiming, LI Liangliang, WANG Changyu, HUANG Ning, LIU Liping, SHEN Chungen, LU Jinzhong. Study on the Electrochemical Corrosion Behavior of In Situ Synthesized TA1/Ti64 New Alloy through Dual-wire Electron Beam Freedom Fabrication[J]. Journal of Mechanical Engineering, 2026, 62(12): 181-192.

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电子束双线自由成形原位合成TA1/Ti64新合金电化学腐蚀行为研究

Study on the Electrochemical Corrosion Behavior of In Situ Synthesized TA1/Ti64 New Alloy through Dual-wire Electron Beam Freedom Fabrication

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