Effect of Electromagnetic Shock Treatment on Resistivity of TC11 Titanium Alloy

LI Jiashun; ZHAI Kuan; ZHOU Jian; GONG Jiawei; WEN Yan; XIE Lechun

doi:10.3969/j.issn.1674-6457.2026.01.001

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (1) : 1-13. DOI: 10.3969/j.issn.1674-6457.2026.01.001

Light Alloy Forming

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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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.

Key words

electromagnetic shock treatment (EST) / TC11 titanium alloy / electrical resistivity / grain refinement / microstructure

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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

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