Evolution of Fe based intermetallic phases in Al–Si hypoeutectic casting alloys: Influence of the Si and Fe concentrations, and solidification rate

Gorny, Anton; Jeyakumar, Manickaraj; Cai, Zhonghou; Shankar, Sumanth

doi:10.1016/j.jallcom.2013.04.139

Cited by 94 publications

(37 citation statements)

References 32 publications

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“…Further, it is also hypothesized from experimental evidences that the Al 13 Fe 4 binary phase precludes the evolution of Al 8 Fe 2 Si during solidification and subsequently transforms into the Al 9 Fe 2 Si 2 phase during solidification. These observations are anomalous to the publications as prior art and simulation predictions of thermodynamic phase diagrams of these alloys, wherein, only one intermetallic phase Al 9 Fe 2 Si 2 is predicted to evolve and be retained as the terminal phase at the end of solidification [24].…”

Section: Resultscontrasting

confidence: 68%

The formation of (Al8Fe2Si, Al13Fe4) phases from Al-Fe-Si system by TE mode

Boulouma¹,

Drici²,

Benaldjia³

et al. 2015

AIP Conference Proceedings

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Section: Resultscontrasting

confidence: 68%

The formation of (Al8Fe2Si, Al13Fe4) phases from Al-Fe-Si system by TE mode

Boulouma¹,

Drici²,

Benaldjia³

et al. 2015

AIP Conference Proceedings

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“…Similar phenomena has been observed before. gorny et al [14] have found that in AlSi7(Fe) alloy some particles of the τ 5 (α-Al 8 Fe 2 Si) are enveloped by the τ 6 (β-Al 9 Fe 2 Si 2 ) phase. The τ 5 phase undergoes peritectic reaction, which may not be completed.…”

Section: Discussionmentioning

confidence: 99%

Influence of the Chemical Composition on Electrical Conductivity and Mechanical Properties of the Hypoeutectic Al-Si-Mg Alloys

Dybowski

Szymszal

Poloczek

et al. 2016

Archives of Metallurgy and Materials

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Due to low density and good mechanical properties, aluminium alloys are widely applied in transportation industry. Moreover, they are characterized by the specific physical properties, such as high electrical conductivity. This led to application of the hypoeutectic Al-Si-Mg alloys in the power generation industry. Proper selection of the alloys chemical composition is an important stage in achievement of the demanded properties. The following paper presents results of the research on the influence of alloys chemical composition on their properties. It has been revealed that Si and Ti addition decreases electrical conductivity of the Al-Si-Mg alloys, while Na addition increases it. The mechanical properties of the investigated alloys are decreased by both silicon and iron presence. Sodium addition increases ductility of the Al-Si-Mg alloys.

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“…hexagonal a-Al [4][5][6][7]. However, thermodynamic selection of intermetallic phase formation is strongly dependent on the concentration of both Fe and Si [8]. For example, at a temperature of 625 o C in Al-6wt% Si-2wt% Fe alloy only a-Al 8 Fe 2 Si and liquid can coexist, however, increasing Si content to 10wt% would cause equilibrium between b-Al 9 Fe 2 Si 2 phase and liquid at the same temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Choice of two alloys would also enable one to understand the role of the silicon in these high Fe content alloys. In these alloys the relevant intermetallic phase present at room temperature is the so called b-Al 9 Fe 2 Si 2 , also designated as b-Al 5 FeSi or t 6 phase in the literatures [4][5][6][7][8]. It is known that this inherently brittle b-phase is formed as three-dimensionally interlinked thin platelets with characteristic needle-like appearance in the micrographs [9,10].…”

Section: Introductionmentioning

confidence: 99%

Morphological changes and segregation of β-Al 9 Fe 2 Si 2 phase: A perspective from better recyclability of cast Al-Si alloys

Basak

Babu

2016

Materials & Design

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High iron impurity has detrimental effects on the castability and tensile properties of recycled aluminium alloys. The present study reports the engineering of intermetallic β-phase present in hypoeutectic cast Al-Si model alloy systems with high Fe content (2wt% Fe) in order to demonstrate the promising recyclability despite having high Fe content. Thermodynamic interplay between Si and Fe concentration on the formation of the β-phase and the solidification behaviour of the hypoeutectic Al-Si alloys has been explored. It has been demonstrated that with suitable heat treatment it is possible to alter the morphology of the β-phase and based on the experimental evidences, for the first time, the mechanism behind the solid-state morphological changes of beta phase has been proposed. Based on the experimental results and thermodynamic calculations it has been suggested that elimination of beta phase by gravitational segregation is more suitable for the near-eutectic 10wt% Si alloy; whereas for 6wt%Si alloy, morphological change of β-phase is recommended. It was also found that morphological change of beta-phase and Si could help recovering the strength and ductility in the recycled Al-Si alloys having high Fe content.

show abstract

Evolution of Fe based intermetallic phases in Al–Si hypoeutectic casting alloys: Influence of the Si and Fe concentrations, and solidification rate

Cited by 94 publications

References 32 publications

The formation of (Al8Fe2Si, Al13Fe4) phases from Al-Fe-Si system by TE mode

The formation of (Al8Fe2Si, Al13Fe4) phases from Al-Fe-Si system by TE mode

Influence of the Chemical Composition on Electrical Conductivity and Mechanical Properties of the Hypoeutectic Al-Si-Mg Alloys

Morphological changes and segregation of β-Al 9 Fe 2 Si 2 phase: A perspective from better recyclability of cast Al-Si alloys

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