电磁冲击处理对TC11钛合金电阻率的影响研究

李嘉顺; 翟宽; 周健; 龚佳伟; 温艳; 谢乐春

doi:10.3969/j.issn.1674-6457.2026.01.001

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精密成形工程 ›› 2026, Vol. 18 ›› Issue (1) : 1-13. DOI: 10.3969/j.issn.1674-6457.2026.01.001

轻合金成形

电磁冲击处理对TC11钛合金电阻率的影响研究

李嘉顺^a, 翟宽^b, 周健^a, 龚佳伟^a, 温艳^a,*, 谢乐春^a,*

作者信息 +

Effect of Electromagnetic Shock Treatment on Resistivity of TC11 Titanium Alloy

LI Jiashun^a, ZHAI Kuan^b, ZHOU Jian^a, GONG Jiawei^a, WEN Yan^a,*, XIE Lechun^a,*

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文章历史 +

摘要

目的在不同脉冲电流与恒定磁场的耦合作用下,分析电磁冲击处理（Electromagnetic Shock Treatment,EST）后TC11钛合金微区电阻率的变化规律,并通过表征其微观组织的演化过程,揭示EST作用下电阻率变化的微观机制。方法构建了一套结合四探针法与光刻工艺的微区电阻率测量系统,实现了高分辨率、可控接触条件下的局部导电性能表征。通过引入主成分分析（PCA）与多元回归建模方法,对样品厚度、电极结构和接触误差等影响因素进行量化评估与校正。在此基础上,对不同EST参数处理后的样品进行了系统测量,并结合电子背散射衍射（Electron Backscatter Diffraction,EBSD）技术,分析其晶粒尺寸、相比例及KAM值等微观结构指标。结果未处理样品（No.1）的晶粒平均面积为3.95 μm²,对应电阻率为2.078 μΩ·m;经EST处理后的样品（No.3,180 A/30 mT）晶粒平均面积降低至2.47 μm²,电阻率升高至2.224 μΩ·m。电阻率呈现“先升后降”的非线性演化趋势,误差修正后,测量精度可控制在±0.211 μΩ·m以内。结论 EST可显著促进晶粒细化并诱导组织重构,不同参数的EST处理对TC11钛合金导电性能产生了不同影响。适度的EST处理有助于通过微结构调控优化材料的局部电阻率表现。上述研究为钛合金在微尺度下的无损评估、电学性能调控及多场耦合机制的探索提供了理论支撑与实验基础。

Abstract

The work aims to measure the variation of micro-region electrical resistivity in TC11 titanium alloy after Electromagnetic Shock Treatment (EST) under the combined effect of pulsed current and a constant magnetic field and reveal the micro-mechanism of resistivity changes under EST by characterizing the evolution process of its microstructure. A high-resolution micro-region resistivity measurement system was developed by integrating the four-probe method with photolithography, enabling precise characterization of local electrical conductivity under controllable contact conditions. Principal component analysis (PCA) and multivariate regression modeling were employed to quantitatively evaluate and correct the effects of sample thickness, electrode geometry, and contact error. Based on this system, the samples subject to varying EST parameters were systematically tested, and the corresponding microstructural indices such as grain size, phase fraction, and kernel average misorientation (KAM) were quantitatively analyzed with Electron Backscatter Diffraction (EBSD) techniques. The untreated sample (No.1) exhibited an average grain area of 3.95 μm² with a resistivity of 2.078 μΩ·m, whereas the EST-treated sample (No.3, 180 A/30 mT) showed a decreased average grain area of 2.47 μm² and an increased resistivity of 2.224 μΩ·m. The resistivity demonstrated a nonlinear “rise-then-fall” evolution trend, with the corrected measurement precision controlled within ±0.211 μΩ·m. In conclusion, EST is found to significantly promote grain refinement and induce microstructural reconstruction. The electrical conductivity of the TC11 alloy is clearly affected by different EST parameters, and moderate EST treatment proves effective in optimizing local resistivity through microstructural control. This study provides a theoretical basis and experimental foundation for microscale nondestructive evaluation, electrical performance regulation, and the investigation of multi-field coupling mechanisms in titanium alloys.

导出引用

李嘉顺, 翟宽, 周健, 龚佳伟, 温艳, 谢乐春. 电磁冲击处理对TC11钛合金电阻率的影响研究[J]. 精密成形工程. 2026, 18(1): 1-13 https://doi.org/10.3969/j.issn.1674-6457.2026.01.001

LI Jiashun, ZHAI Kuan, ZHOU Jian, GONG Jiawei, WEN Yan, XIE Lechun. Effect of Electromagnetic Shock Treatment on Resistivity of TC11 Titanium Alloy[J]. Journal of Netshape Forming Engineering. 2026, 18(1): 1-13 https://doi.org/10.3969/j.issn.1674-6457.2026.01.001

中图分类号： TG146.2+3

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