Investigation on the Hardness of Al6061 Alloys: Implications of Seawater Corrosion

dc.contributor.authorBegum, Y.
dc.contributor.authorDoddamani, S.
dc.date.accessioned2026-02-04T12:24:35Z
dc.date.issued2024
dc.description.abstractThis study aims to investigate the impact of seawater corrosion on the hardness of Al-Mg-Si alloys, providing insights into the mechanical alterations induced by exposure to corrosive marine environments. Al-Mg-Si alloys are widely used in marine environments because of their high strength-to-weight ratio and excellent corrosion resistance. However, exposure to seawater can lead to corrosion, which can alter their mechanical properties, including hardness. In this study, Al6061 alloy specimens were exposed to seawater for different periods (3–30 days), and their hardness was measured using Vickers hardness testing. The corrosion rate was determined by weight loss analysis. The results showed that the corrosion rate of Al6061 alloys increased with increased exposure time in seawater, up to 20%. The hardness versus corrosion rate plot analysis indicates an inverse relationship, with scatter points aligning well with a linear regression model. The Vickers' hardness of the samples decreased as the corrosion rate increased. This hardness decline in Al6061 alloys under escalating corrosion rates is attributed to material loss, heightened porosity, and microstructural transformations arising from corrosion product formation. Comprehensive corrosion micrographs unveiled advanced corrosion stages, marked by dynamic pit and crack expansion, oxide layer degradation, pit coalescence, and emergence of distinct corrosion patterns. © The Minerals, Metals & Materials Society 2024.
dc.identifier.citationJOM, 2024, 76, 7, pp. 3734-3742
dc.identifier.issn10474838
dc.identifier.urihttps://doi.org/10.1007/s11837-024-06607-1
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/21036
dc.publisherSpringer
dc.subjectAluminum alloys
dc.subjectAluminum corrosion
dc.subjectCorrosion resistance
dc.subjectCorrosion resistant alloys
dc.subjectHigh strength alloys
dc.subjectLinear regression
dc.subjectMagnesium alloys
dc.subjectSeawater corrosion
dc.subjectSilicon alloys
dc.subjectVickers hardness
dc.subjectExcellent corrosion resistances
dc.subjectExposed to
dc.subjectExposure-time
dc.subjectHigh-strength
dc.subjectLosses analysis
dc.subjectMarine environment
dc.subjectMechanical
dc.subjectPlot analysis
dc.subjectStrength to weight ratio
dc.subjectWeight loss
dc.subjectCorrosion rate
dc.titleInvestigation on the Hardness of Al6061 Alloys: Implications of Seawater Corrosion

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