The microstructure-corrosion relationships in laser-welded dissimilar steel-to-aluminium joints

被引：0
|
作者：
Ahuir-Torres, J. I. [1 ]
Jabar, S. [2 ]
Franciosa, P. [2 ]
Ceglarek, D. [2 ]
Kotadia, H. R. [1 ,2 ]
机构：
[1] Liverpool John Moores Univ, Sch Engn, Liverpool, England
[2] Univ Warwick, WMG, Coventry, England
来源：
NPJ MATERIALS DEGRADATION | 2024年 / 8卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
CONTAINING INTERMETALLIC PARTICLES; ELECTROCHEMICAL-BEHAVIOR; SEA-WATER; IMPEDANCE; ALLOY; RESISTANCE; EVOLUTION; BEAM;
D O I：
10.1038/s41529-024-00517-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigated the corrosion behaviour of dissimilar steel-to-aluminium laser-welded conduction, and keyhole mode (partial- and full-penetration) lap joints through electrochemical techniques and advanced microstructural characterisation. The corrosion resistance of the weld was found to be higher than the base materials, primarily due to the presence of cathodic FexAly (eta-Fe2Al5, theta-Fe4Al13, beta-FeAl) intermetallic compounds (IMCs) with high corrosion potential. The different micro and macro-galvanic corrosion mechanisms were found at various interfaces around the weld, resulting in localised pitting corrosion. The keyhole mode welding showed improved corrosion resistance, primarily attributed to the type, size, and distribution of IMCs.
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收藏
页数：17
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