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Journal:Journal of The Electrochemical Society
Abstract:Electrochemical machining (ECM) offers a novel solution for forming and manufacturing aero-engine narrow-channel blisks from difficult-to-machine titanium alloys due to its non-contact processing method. This study investigates the electrochemical dissolution and machining characteristics of α + β titanium alloy TC11, using TC4 and TC6 for comparison in 10% NaCl solution. Potentiodynamic polarization tests revealed TC11 had the highest decomposition voltage (>7 V). Electrochemical impedance and XPS analyses confirmed a dual-layer passivation film structure on all alloys, with TC11 exhibiting significantly higher film resistance, indicating superior corrosion resistance. In pulse ECM of narrow blade channels, TC11 demonstrated the best machining accuracy, yielding the smallest channel width (3.68 mm), taper (0.59 mm) and taper angle 4.59°, alongside the lowest surface roughness (3.973–5.186 μm). This is attributed to its highly stable passivation film, which minimizes stray corrosion. The results establish TC11 as a promising material for high-precision electrochemical machining applications. TC11 shows highest decomposition voltage (>7 V) and superior corrosion resistance. Stable passive film on TC11 reduces stray corrosion in pulse ECM. TC11 achieves minimal channel width, taper, and roughness in narrow blisk machining.
Co-author:张振,曹倩楠,耿永秀,李世成,张如意,岳小康,方明
First Author:张聚臣
Indexed by:Journal paper
Discipline:Engineering
Document Type:J
Volume:173
Issue:5
Translation or Not:no
Date of Publication:2026-03-10
Included Journals:SCI