Influence of heat treatment and anodizing on the corrosion behaviour of additive manufactured AlSi10Mg alloy

Additive manufacturing (AM) processes produce complex and multifunctional items by layering pre-alloyed powder. Among them, direct metal laser sintering (DMLS) process encourages creation of distinct microstructures and internal phase distributions. These microstructures possess substantial influenc...

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Bibliographic Details
Published in:Bulletin of materials science 2024-10, Vol.47 (4), p.248, Article 248
Main Authors: Chandramohan, P, Raghu, R, Dharmaseelan, K, Harinadh, S
Format: Article
Language:English
Subjects:
Aging
Alloy powders
Alloys
Aluminum base alloys
Anodizing
Atmospheric corrosion
Chemistry and Materials Science
Corrosion potential
Corrosion rate
Corrosion resistance
Corrosion resistant alloys
Corrosion tests
Electrodes
Electrolytes
Engineering
Failure mechanisms
Heat treating
Heat treatment
Laser sintering
Lasers
Materials Science
Microstructure
Morphology
Phase distribution
Silicon
Sintering (powder metallurgy)
Stress relieving
Sulfuric acid
Surface treatment
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Summary:Additive manufacturing (AM) processes produce complex and multifunctional items by layering pre-alloyed powder. Among them, direct metal laser sintering (DMLS) process encourages creation of distinct microstructures and internal phase distributions. These microstructures possess substantial influence on corrosion performance and mechanisms of corrosion resistance-improving surface treatments, such as anodizing. Hence, this study emphasize on corrosion performance of anodized and unanodized heat-treated AlSi10Mg samples manufactured through DMLS method. As built AlSi10Mg samples were subjected to stress relieving and T6 heat-treatment. The heat-treated samples were further subjected to anodizing process in H 2 SO 4 electrolyte solution. Microstructural characterization of unanodized and anodized heat-treated samples was performed through microscopy analysis. In addition, corrosion experiments were performed in 1 M H 2 SO 4 solution on anodized and unanodized heat-treated samples to determine E corr , I corr and corrosion rate values. The corroded samples are further characterized to understand different failure mechanisms.
ISSN:0973-7669
0250-4707
0973-7669
DOI:10.1007/s12034-024-03223-2