Authors :
Arulkumar S.; Anandakrishnan V.; Jayasankari S.
Volume/Issue :
Volume 11 - 2026, Issue 2 - February
Google Scholar :
https://tinyurl.com/43vd7bx2
Scribd :
https://tinyurl.com/45adh395
DOI :
https://doi.org/10.38124/ijisrt/26feb1444
Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.
Abstract :
Additive manufacturing enables near net-shape fabrication with reduced material waste, supporting sustainable
and lean manufacturing practices for rapid component production and repair. In the present study, wire arc additive
manufacturing (WAAM) using a gas metal arc welding process was employed to fabricate an AA7075 aluminum alloy
reinforced with nano-sized titanium carbide (TiC) particles. The corrosion behavior of the WAAM-fabricated AA7075–
Nano-TiC metal matrix composite was systematically investigated in 3.5 wt.% NaCl solution and correlated with
microstructural characteristics. Electron backscatter diffraction analysis was performed to examine grain morphology,
while hardness measurements were used to assess mechanical response. Electrochemical corrosion behavior was evaluated
using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The corrosion potential and
corrosion current density were determined using Tafel extrapolation, while impedance behavior was analyzed through Bode
impedance and phase angle plots. The WAAM-fabricated composite exhibited moderate corrosion resistance, governed by
charge transfer through a non-ideal passive oxide layer. Scanning electron microscopy coupled with energy-dispersive
spectroscopy was used to examine the corroded surface morphology and elemental distribution. The results highlight the
influence of WAAM-induced microstructural heterogeneity and nano-TiC reinforcement on the corrosion behavior of
AA7075-based composites.
Keywords :
AA7075 Nano-TiC Metal Matrix Composite, Wire Arc Additive Manufacturing, Corrosion Behavior, Potentiodynamic Polarization, Electrochemical Impedance Spectroscopy.
References :
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Additive manufacturing enables near net-shape fabrication with reduced material waste, supporting sustainable
and lean manufacturing practices for rapid component production and repair. In the present study, wire arc additive
manufacturing (WAAM) using a gas metal arc welding process was employed to fabricate an AA7075 aluminum alloy
reinforced with nano-sized titanium carbide (TiC) particles. The corrosion behavior of the WAAM-fabricated AA7075–
Nano-TiC metal matrix composite was systematically investigated in 3.5 wt.% NaCl solution and correlated with
microstructural characteristics. Electron backscatter diffraction analysis was performed to examine grain morphology,
while hardness measurements were used to assess mechanical response. Electrochemical corrosion behavior was evaluated
using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The corrosion potential and
corrosion current density were determined using Tafel extrapolation, while impedance behavior was analyzed through Bode
impedance and phase angle plots. The WAAM-fabricated composite exhibited moderate corrosion resistance, governed by
charge transfer through a non-ideal passive oxide layer. Scanning electron microscopy coupled with energy-dispersive
spectroscopy was used to examine the corroded surface morphology and elemental distribution. The results highlight the
influence of WAAM-induced microstructural heterogeneity and nano-TiC reinforcement on the corrosion behavior of
AA7075-based composites.
Keywords :
AA7075 Nano-TiC Metal Matrix Composite, Wire Arc Additive Manufacturing, Corrosion Behavior, Potentiodynamic Polarization, Electrochemical Impedance Spectroscopy.
