Pitting and intergranular corrosion of Scalmalloy® aluminium alloy additively manufactured by Selective Laser Melting (SLM)

被引：19
|
作者：
Cabrera-Correa, Leticia [1 ,2 ,3 ]
Gonzalez-Rovira, Leandro [1 ,2 ]
de Dios Lopez-Castro, Juan [1 ,2 ]
Botana, F. Javier [1 ,2 ]
机构：
[1] Univ Cadiz, Dept Ciencia Mat & Ingn Met & Quim Inorgan, Escuela Super Ingn, 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 | 2022年 / 201卷
关键词：
A; aluminium; B; SEM; TEM; weight loss; C; pitting corrosion; intergranular corrosion; SC-ZR ALLOY; MECHANICAL-PROPERTIES; INTERMETALLIC PHASES; LOCALIZED CORROSION; PIT INITIATION; AL; MICROSTRUCTURE; BEHAVIOR; NANOPRECIPITATION; TEMPERATURE;
D O I：
10.1016/j.corsci.2022.110273
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Localized corrosion of Scalmalloy (R) processed by Selective Laser Melting (SLM) under certified conditions is studied and correlated with the intermetallic particles present in the microstructure. Two types of samples are considered: as-built and heat-treated samples. The heat treatment does not modify the pitting corrosion performance. All samples exhibit two groups of pits with different repassivation behaviour. Si-bearing and Fe bearing phases produce pitting, while Al(Sc,Zr) is not found to be important. The two types of samples are resistant to intergranular corrosion (IGC) according to ASTM G67 thanks to the low content of beta phase. However, the heat-treatment slightly increases the IGC-susceptibility.
引用
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页数：16
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