Localized and stress corrosion cracking of sensitized Al-Mg-Sc-Zr alloy manufactured by laser powder bed fusion

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URI: http://hdl.handle.net/10498/28812

DOI: 10.1016/j.corsci.2023.111166

ISSN: 0010-938X

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Author/s
Cabrera Correa, LeticiaAuthority UCA; González Rovira, LeandroAuthority UCA; Ojeda López, AdriánAuthority UCA; López Castro, Juan de DiosAuthority UCA; Botana Pedemonte, Francisco JavierAuthority UCA
Date
2023-04-05
Department
Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica; Ingeniería Mecánica y Diseño Industrial
Source
Corrosion Science. Vol. 218, July 2023, 111166
Abstract
The effect of thermal ageing at 150 ºC on the corrosion behaviour of Scalmalloy® (Al-Mg-Sc-Zr) alloy additively manufactured by laser powder bed fusion (LPBF) is reported for the first time. Samples before and after the thermal treatment exhibit similar results on cyclic polarisation curves, electrochemical impedance measurements in 3.5 wt% NaCl, and tensile and hardness tests. However, electron microscopy characterisation reveals that the application of this temperature for sufficient time causes most of the grain limits to be decorated by Al3Mg2 particles which in turn provokes the sensitization of the alloy to intergranular corrosion processes due to microgalvanic coupling
Subjects
Aluminum; polarization; intergranular corrosion; SEM; Stress corrosion; Weight loss
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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
This work is under a Creative Commons License Attribution-NonCommercial-NoDerivatives 4.0 Internacional