Evaluation of the corrosion resistance of a new AlSi10MnMg(Fe) secondary alloy

Berlanga, Carlos; Bakedano, A.; Ciriza, A. Perez de; Rivero, Pedro J.; Méndez, Susana; Rodriguez, R.; Niklas, Andrea

doi:10.1016/j.matpr.2018.10.411

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…In regard to microstructures, alloy EN AC 45300 belongs to the hypoeutectic system Al-Si and is suitable for both mould and sand castings; its composition contains relatively high amounts of Cu and Mg, enabling the nucleation of intermetallic phases as θ-Al On the contrary, alloy EN AC 43500 can only form intermetallics Fe, Mn, and Mg-based [12,29]. This alloy is largely used for high-pressure die casting but is suitable for all types of casting.…”

Section: Methodsmentioning

confidence: 99%

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Effects of Casting-Additives on the Microstructure Evolution of Hypoeutectic Aluminium-Silicon Alloys

Fracchia¹,

Gobber²,

Rosso

2020

Metals

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Since the industries are called to produce environmentally friendly products, the research is moving toward new improved materials. In this panorama, aluminium alloys find applications for a large range of products. In the automotive, as well as in the aerospace, sector, aluminium alloys are largely adopted, thanks to their high specific properties and their light weight. Moreover, common casting techniques permit us to realize complex high-quality components. These components may be realized by using casting techniques adopting casting-additives, such as modifiers or refiners. In this work, the effect of refining and modification was studied in terms of microstructural evolution of the intermetallic phases in two aluminium-silicon alloys (EN AC 45300 and EN AC 43500). Microstructures were analyzed through micro-hardness measures, and we found a reduction in the standard deviation of the hardness with the addition of additives. Furthermore, secondary dendrites arms spacings (SDAS) were measured, evidencing a decrease in SDAS by adding casting additives. A strong correlation was found between the adding of additives and the possibility of containing the size of the silicon and of all the intermetallic phases opening up to the possibility of tailoring the microstructures.

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Section: Methodsmentioning

confidence: 99%

“…On the contrary, alloy EN AC 43500 can only form intermetallics Fe, Mn, and Mg-based [12,29]. This alloy is largely used for high-pressure die casting but is suitable for all types of casting.…”

Section: Methodsmentioning

confidence: 99%

Effects of Casting-Additives on the Microstructure Evolution of Hypoeutectic Aluminium-Silicon Alloys

Fracchia¹,

Gobber²,

Rosso

2020

Metals

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“…The corrosion progress for AlSi10MgMn in saline solutions is mainly through the eutectic areas rather than the boundaries of the intermetallic compounds. [ 4 ] The damaging influence of corrosion on the fatigue strength can be observed in almost all components during operation. A large number of factors play an important role in this, including the interaction between corrosion and mechanical stress.…”

Section: Introductionmentioning

confidence: 99%

Influence of corrosion fatigue on the fatigue strength of an AlSi10MgMn high‐pressure die‐casting alloy with regard to the surface condition

Schönowitz,

Maier,

Grün

et al. 2023

Materials & Corrosion

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This study investigates the influence of corrosion fatigue on the fatigue strength of an AlSi10MgMn high‐pressure die‐casting alloy with regard to the surface condition. Two different surface conditions are compared. First, an unmachined surface condition with a rough surface () and second a machined and polished surface condition with a smooth, polished surface () are tested. The specimens are loaded with a cyclic bending moment at a constant stress ratio of R = 0 till failure. A 5 wt% NaCl solution enables the corrosion fatigue tests. Corrosion fatigue leads to a significant reduction of the endurable stresses along the whole load spectrum independent from the surface condition. The applied corrosive solution prevents the formation of a pronounced long‐life fatigue strength limit within the tested load cycle range. Hence, the reduction of the endurable stresses increases with the increasing number of load cycles, reaching approximately 37% at load cycles. No significant influence of the surface condition, independent of the environment (air, 5 wt% NaCl), on the fatigue behaviour is found.

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“…Although, size of the SDAS has a direct influence on mechanical properties, it is not clear if decrease in the SDAS improves resistance to microstructure degradation in corrosive environment. In order to understand microstructures tendency towards degradation, SDAS needs to be correlated with phase distribution into the interdendritic region and its anodic/cathodic behavior with respect to the αAl matrix [2]. As a part of the main eutectic (αAl + βSi), βSi particles are cathodic with respect to the αAl matrix causing the formation of micro-galvanic couples and localized corrosion phenomena [3].…”

Section: Introductionmentioning

confidence: 99%

INFLUENCE OF MODIFICATION ON MICROSTRUCTURE DEGRADATION OF AlSi12 ALLOY EXPOSED TO THE CORROSION ENVIRONMENT

Kozina

Brodarac

2020

METAL 2020 Conference Proeedings

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The corrosion resistance of aluminum-silicon (Al-Si) foundry alloys is a result of microstructure development influenced by melt treatment and solidification. As a part of the main eutectic (αAl + βSi), βSi particles are cathodic with respect to the αAl matrix enabling micro-galvanic couple formation and localized corrosion. Despite its high polarization and low current density, increase in the eutectic (αAl + βSi) will contribute to the microstructure degradation of an alloy in corrosive environment. The research was performed in order to estimate the influence of eutectic βSi particles size on the microstructure degradation of AlSi12 alloy with mixed morphology of eutectic (αAl + βSi). The results of light microscopy indicated preferred initiation and progress of cavities involving modified eutectic (αAl + βSi) with eutectic βSi particles of smaller average particle size. The unmodified eutectic (αAl + βSi) with lamellar morphology and dendrites of primary αAl phase were not visually affected by degradation. The average cavity size and pH value of the solution increase with the increasing exposure time, while microstructure degradation rate decreases.

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Evaluation of the corrosion resistance of a new AlSi10MnMg(Fe) secondary alloy

Cited by 7 publications

References 8 publications

Effects of Casting-Additives on the Microstructure Evolution of Hypoeutectic Aluminium-Silicon Alloys

Effects of Casting-Additives on the Microstructure Evolution of Hypoeutectic Aluminium-Silicon Alloys

Influence of corrosion fatigue on the fatigue strength of an AlSi10MgMn high‐pressure die‐casting alloy with regard to the surface condition

INFLUENCE OF MODIFICATION ON MICROSTRUCTURE DEGRADATION OF AlSi12 ALLOY EXPOSED TO THE CORROSION ENVIRONMENT

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