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Tibballs, J. E.; Horst, Jens Anton; Simensen, Christian J.

doi:10.1023/a:1004815621313

Cited by 36 publications

(28 citation statements)

References 6 publications

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“…It means that addition of 0.1wt.% Mn was insufficient for cubic structure stabilization in slowly cooled AlFe3Mn0.1Si6 alloy and α c -AlFeMnSi phase was still its metastable micro- structure constituent. Similar effects were noticed in the hypoeutectic AlFeMnSi alloys examined previously in the work of Tibbals [3]. Essential effect of Mn content on stabilization of the α c -AlFeMnSi phase in the AlFeMnSi alloys was reported by Huang [19].…”

Section: Evolution Of the Alfemnsi Intermetallics Morphology As Affecsupporting

confidence: 84%

“…Chemical composition of AlFeMnSi alloy, especially Mn content has an important impact on a final effect of microstructure evolution: intermetallic AlFeMnSi phases crystal lattice and morphology of their primary particles [2][3][4][5]15]. In this work, it was noticed that in the AlFe3Mn0.1Si6 alloy, quickly cooled and frozen at 695°C, the dendrites of the α c -AlFeMnSi phase replaced the polyhedra of the α H -AlFeSi phase, equilibrium in ternary AlFeSi system, precipitated previously at low cooling rate (Fig.…”

Section: Evolution Of the Alfemnsi Intermetallics Morphology As Affecmentioning

confidence: 99%

“…They arise in the polyphase eutectics in a typical shape of the Chinese script. However, in some range of the chemical composition, the massive particles of the AlFeMnSi phases form directly in the liquid alloy through incongruent solidification, before α-Al solid solution crystallization begins [2][3][4][5][6][7] (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

“…In the technical aluminum alloys containing transition metals, quickly cooled, especially when sludge factor SF exceeds 1 (SF = %Fe + 2%Mn + 3%Cr), either dendrite-or star-shaped particles of the quaternary α c -AlFeMnSi phase were also observed [4,5,15]. Nevertheless, change of shape of the AlFeMnSi primary precipitates from polyhedra to dendrites seems to be influenced not only by actual cooling rate but also by transition metals content, especially by Fe/Mn ratio [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…In this work, a common effect of the Fe/Mn ratio and the cooling rate on shape and crystal structure of the primary AlFeMnSi intermetallic phases will be considered in both hypo-and eutectic AlFeMnSi alloys in a range of concentration of transition metals examined before in slowly cooled alloys in works [2,3,6,7].…”

Section: Introductionmentioning

confidence: 99%

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Primary Crystals of AlfeMnSi Intermetallics in the Cast AlSi Alloys

Warmuzek

2017

Archives of Metallurgy and Materials

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In this paper the results of the microscopic observations of the intermetallic AlFeMnSi phases crystals formed in the liquid hypo-and eutectic AlSi alloys containing transition metals 3.0 wt.% Fe and 0.1, 0.5 and 2.0 wt.% Mn were presented. The crystals morphology has been revealed on both polished and deep etched microsections. The different stages of the primary AlFeMnSi phases particles formation in the solidifying alloy and their final morphology were shown as influenced by cooling rate and alloy chemical composition.

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Section: Evolution Of the Alfemnsi Intermetallics Morphology As Affecsupporting

confidence: 84%

Section: Evolution Of the Alfemnsi Intermetallics Morphology As Affecmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Primary Crystals of AlfeMnSi Intermetallics in the Cast AlSi Alloys

Warmuzek

2017

Archives of Metallurgy and Materials

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Dealing with Fe in Secondary Al-Si Alloys Including Metal Melt Filtration

Becker,

Leineweber

2024

Springer Series in Materials Science

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Fe is a detrimental impurity element in secondary, i. e. recycled, Al–Si cast alloys (Zhang et al. in Miner. Process. Extr. Metall. Rev. 33:99, 2012;Raabe et al. in Prog. Mater. Sci. 128, 2022;). It leads to decrease of castability and promotes crack formation due to formation of primary, Fe-containing intermetallic particles, e.g. plate-shaped β-Al–Fe–Si, coarse αh-Al–Fe–Si or αc-Al–(Fe,Mn,Cr)–Si in presence of further transition metal elements e.g. Mn and Cr. Successfully, dealing with such secondary Al–Si cast alloys contributes to sustainability, circular economy and reduction of energy consumption (Raabe et al. in Prog. Mater. Sci. 128, 2022;Taylor in Mater. Sci. Forum 689:429, 2011;). In the present chapter, a systematic understanding is provided for dealing with Fe impurities in secondary Al–Si alloys by. removal of Fe on the basis of melt conditioning and metal melt filtration and modification of Fe-containing phases into harmless microstructural components. In this context new insight is obtained into. the crystal structures of some relevant intermetallic phases occurring in secondary Al–Si alloys, thermodynamics and kinetics of phase formation during solidification and the interaction of different filter materials with the transition metal containing Al–Si alloys. The crystal structures of the β-Al–Fe–Si and δ-Al–Fe–Si phases and of their ordered variants were investigated. This allowed reliable distinction of occurring intermetallic phases, the αh-Al–Fe–Si, the αc-Al–(Fe,Mn,Cr)–Si, the β-Al–Fe–Si and the δ-Al–Fe–Si phase, especially by electron backscatter diffraction. While modification of the alloy composition by the Mn, Cr content and presence of other transition metal elements affect the thermodynamic properties of the phases, these elements also significantly affect the kinetics of phase formation during solidification at high cooling rates including the resulting phase morphology. The formation of primary, intermetallic phases during melt conditioning closely above the solidification temperature of the (Al)-solid solution can be utilized for the removal of Fe by separating the primary, Fe-containing, intermetallic particles from the Fe-depleted Al melt. Removal of such particles by application of filters to increase the Fe-removal efficiency extends the filters’ use beyond the removal of nonmetallic inclusions, contributing to production of high-quality, recycled Al–Si alloys. Evaluation of wettability, chemical reactions and microstructure in the interaction region between the filter material and Al–Si melts and the Fe-depleted melt reveals a beneficial effect of C-bonded Al2O3 filter material.

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