Understanding crystal structure and morphology evolution of Fe, Mn, Cr-containing phases in Al-Si cast alloy

Zhang, Xiaozu; Wang, Dongtao; Li, Xinzhong; Zhang, Haitao; Nagaumi, Hiromi

doi:10.1016/j.intermet.2021.107103

Cited by 27 publications

(13 citation statements)

References 22 publications

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“…The above results indicate that the element Co does have modifying performance on Fe-rich phase in Al-Si-Fe alloys, similar to Mn and Cr [29][30][31][32]. Comparing with Fe [33], the Co-rich phase in Al-Si alloys is more preferred to exhibit finer dendritic shape at a certain content. Also, the addition of Co element in Al-Si alloys is much easier to lead to a high undercooling, resulting in the modification of both eutectic/primary Si phase and Co-rich intermetallic compounds.…”

Section: Effect Of Fe Content and Cooling Condition On The Microstruc...mentioning

confidence: 65%

“…For the concept of adding neutralizers to modify Fe-rich phase, the most used elements include Mn, Cr and Co [29][30][31][32]. Zhang et al [33] found that the addition of Mn and Cr in Al-7Si-0.5Fe melt can increase the precipitation temperatures of Fe-rich phase, resulting in variation of crystal structures from monoclinic γ-AlFeSi to cubic α-AlFeMnCrSi phases. Simultaneously, the morphology of Fe-rich phase changes from platelike to cubic shape with the addition of Mn and Cr.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Si, Co, Fe contents and cooling condition on the microstructure of Al–Si–Co(–Fe) alloys

Li,

Gao

et al. 2023

Mater. Res. Express

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In this paper, several Al–Si–Co and Al–Si–Co–Fe alloys were prepared by varying the contents of Si, Co and Fe, solidified via fast and slow–cooling conditions. In the ternary Al–xSi–yCo (x=6, 12, 18; y=2, 4) alloys, the Co–rich phase is Al9Co2–type with a certain Si content, which can be marked as (Al,Si)9Co2. The Al9Co2–type phase exhibits developed dendrites and block–like morphologies under fast and slow cooling conditions, respectively. In the quaternary Al–xSi–4Co–yFe (x=6, 12, 18; y=2, 4) alloys, the formed intermetallic compound is Al13Fe4–type, containing a certain amount of Si and Co. It exhibits fine and coarse dendritic morphologies under fast and slow–cooling conditions, respectively. With the increase of Si content and Fe: Co ratio in the Al–xSi–4Co–yFe alloys, the Si content and Fe: Co ratio in the Al13Fe4–type phase increase synchronously. The hardness of Al–xSi–4Co–yFe alloys were tested, and it was found that the fast–cooling alloys have higher hardness than the slow–cooling ones, while the value of fast–cooling Al–12Si–4Co–4Fe alloy is the highest. Besides, comparing with Al9Co2, the Al13Fe4 phase has a much higher tendentiousness to precipitate from Al–Si–Co–Fe alloys. This work may be referred for the control of Co– and Fe–rich phases in Al–Si alloys, with the concept of altering element contents and solidification conditions.

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Section: Effect Of Fe Content and Cooling Condition On The Microstruc...mentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Effect of Si, Co, Fe contents and cooling condition on the microstructure of Al–Si–Co(–Fe) alloys

Li,

Gao

et al. 2023

Mater. Res. Express

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“…According to the calculations, the gradual addition of Mn can achieve better Fe removal results, because of the highest precipitation temperature of α-Fe rich phase. Furthermore, the efficiency of the sedimentation process can also be improved by promoting the precipitation of Fe-rich compounds at highest temperature and lowest solid fraction of solid [ 27 ].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Fe-rich intermetallic phases affect the performance of the alloys, which is generally controlled by their crystal structure, size, morphology and volume fraction of the compounds [ 27 ]. The crystallographic properties and the nominal composition of the most common Fe-rich intermetallic phases were summarized in Ref.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mn addittion, cooling rate and holding temperature on the modification and purification of iron-rich compounds in AlSi10MnMg(Fe) alloy

Sánchez¹,

Arribas²,

Galarraga³

et al. 2023

Heliyon

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“…1, 3, 5 and even 10% [ [3], [4], [5], [6], [7]]. At the same time, many researchers see a promising direction in applying efforts to transform the needle-shaped β phase into the α phase, which has a more compact morphology [ [8], [9], [10], [11]]. It is noted that in alloys with such an iron content, the α phase is the main strengthening phase, and a general increase in strength and thermal stability is realized due to dispersion strengthening.…”

Section: Introductionmentioning

confidence: 99%

On the influence of iron and silicon content on the phase composition of the Al-Fe-Si system

Andreyachshenko,

Toleuova

2024

Kompl. Ispolz. Min. Syra = Compl. Use of Min. Resour.

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Increasing interest in intermetallic phases of the Al-Fe-Si system is associated with their high specific strength, corrosion and wear resistance, as well as the low cost of their production. To exhibit the most successful combination of properties, it is necessary to impart a specific compact morphology to the precipitated intermetallic phases. It is important to create an alloy with a composition capable of accepting plastic deformation. The purpose of the work is to develop the composition of an Al-Fe-Si system alloy capable of withstanding plastic deformation and determining the corresponding deformation interval. Based on computer modeling, an alloy composition capable of accepting plastic deformation was developed and the corresponding deformation interval was determined. The simulation was carried out in the ThermoCalc software package, TCAL8 database. It has been revealed that alloys with a high content of both silicon and iron are not characterized by the formation of a single-phase region, however, with a certain combination of alloy components, it is possible to achieve a quasi-single-phase structure, when the content of one phase is observed to be more than 90%. The solidus temperatures for different alloy compositions and the boundary conditions for the existence of phases have been determined. The α phase is present in the system from a temperature of 770°C up to a temperature of 446°C. In composition, it is found in the range from 5 to 35% iron with an amount of silicon of 10% and from 0 to 15% silicon with an iron content of 30%. The maximum amount of α phase was obtained for the Al60-65 alloy; Fe30-32; and Si5-10%, deformation temperature range is 600-450°C. Deformation in this region will ensure processing in a quasi-single-phase region without melting.

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Understanding crystal structure and morphology evolution of Fe, Mn, Cr-containing phases in Al-Si cast alloy

Cited by 27 publications

References 22 publications

Effect of Si, Co, Fe contents and cooling condition on the microstructure of Al–Si–Co(–Fe) alloys

Effect of Si, Co, Fe contents and cooling condition on the microstructure of Al–Si–Co(–Fe) alloys

Effects of Mn addittion, cooling rate and holding temperature on the modification and purification of iron-rich compounds in AlSi10MnMg(Fe) alloy

On the influence of iron and silicon content on the phase composition of the Al-Fe-Si system

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