Improvement of corrosion resistance of AA2024-T3 using femtosecond laser peening without protective and confining mediumTrdan, Uroš (Avtor) Tomokazu, Sano (Avtor) Klobčar, Damjan (Avtor) Sano, Yuji (Avtor) Grum, Janez (Avtor) Šturm, Roman (Avtor) aluminiumaluminium alloy 2024-T3polarizationscanning electron microscope - SEMintergranular corrosionpitting corrosionThis work reports for the first time the effect of femtosecond laser shock peening (fLSP) without a sacrificial overlay under atmospheric conditions (no confinement) on the corrosion behaviour of AA2024-T3. After fLSP and additional exposure to air a superhydrophobic state (θ=160 ± 4°) is achieved. Moreover, fLSPed corrosion-resistant surface contributes to increased polarization resistance, reduced corrosion current and lower anodic dissolution, with long-term stability in aggressive chloride solution. Furthermore, SEM/EDS characterisation reveals reduction in pitting and complete eradication of intergranular corrosion (IGC) attack due to reduced metal/electrolyte contact area and homogeneous, refined microstructure which prevents chain-link IGC propagation.20182021-06-01 08:10:40Članek v reviji127264sl