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

被引：6

作者：

Cabrera-Correa, Leticia ^{[1
,2
,3
]}

Gonzalez-Rovira, Leandro ^{[1
,2
]}

Ojeda-Lopez, Adrian ^{[1
,2
,3
]}

de Dios Lopez-Castro, Juan ^{[1
,2
,3
]}

Botana, F. Javier ^{[1
,2
]}

机构：

[1] Univ Cadiz, Escuela Super Ingn, Dept Ciencia Mat & Ingn Met & Quim Inorgan, Cadiz 11519, Spain

[2] Univ Cadiz, IMEYMAT Inst Res Electron Microscopy & Mat, Cadiz, Spain

[3] Titania Ensayos & Proyectos Ind SL Ed RETSE, Nave 4, El Puerto De Santa Maria 11500, Spain

来源：

CORROSION SCIENCE | 2023年 / 218卷

关键词：

B; polarization; SEM; Weight loss; C; intergranular corrosion; Stress corrosion; GRAIN-BOUNDARY SEGREGATION; INTERGRANULAR CORROSION; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; HYDROGEN; MICROSTRUCTURE; SUSCEPTIBILITY; SCANDIUM; BEHAVIOR; PRECIPITATION;

D O I：

10.1016/j.corsci.2023.111166

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of thermal ageing at 150 oC on the corrosion behaviour of Scalmalloy (R) (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.

引用

页数：19

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