Effect of Cooling Rate and Fe/Mn Weight Ratio on Volume Fractions of α-AlFeSi and β-AlFeSi Phases in Al–7.3Si–3.5Cu Alloy

Belmares-Perales, S.; Castro‐Román, M.; Herrera-Trejo, M.; Ramírez-Vidaurri, L. E.

doi:10.3365/met.mat.2008.06.307

Cited by 47 publications

(16 citation statements)

References 15 publications

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“…In this study, however, a-Fe and preeutectic b-Fe phases are also observed in addition to the Al 6 (FeMnCu) and eutectic b-Fe. Many researchers [26][27][28] have studied the effect of Mn on iron-rich intermetallics in Al-Si alloys and found that the solidification sequence may change with the addition of Mn: a-Fe will precipitate prior to b-Fe at high Mn levels. The current work indicates that this still holds true for Al-4.5Cu alloys.…”

Section: Resultsmentioning

confidence: 99%

Solidification of Iron-Rich Intermetallic Phases in Al-4.5Cu-0.3Fe Cast Alloy

Liu

Cao

Chen

2010

Metall Mater Trans A

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The iron-rich intermetallics in A206 type cast aluminum alloy (Al-4.5Cu-0.3Fe) were investigated using thermal analysis, interrupted quenching testing, and differential scanning calorimetry (DSC). An optical microscope with image analysis and scanning electron microscopy were used to identify and quantify the iron-rich intermetallics. Basically, two kinds of ironrich intermetallics, Chinese script Al 15 (FeMn) 3 (SiCu) 2 (a-Fe) and platelet Al 7 Cu 2 (FeMn) or Al 7 Cu 2 Fe (b-Fe), are found in the final microstructures of the A206 cast alloys. All the possible solidification reactions, precipitation temperatures, and nucleation mechanisms for the iron-rich phases were investigated systematically. It is found that both a-Fe and b-Fe phases can precipitate on the oxide films. The a-Fe can also nucleate on Al 6 (FeMnCu) and Al 3 Ti particles. In addition, the previously formed a-Fe phase is also favorable for the nucleation of the b-Fe phase formed subsequently. These nucleation events were not only observed metallographically but also supported by the calculated planar disregistries. A possible nucleation hierarchy has been suggested.

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Section: Resultsmentioning

confidence: 99%

Solidification of Iron-Rich Intermetallic Phases in Al-4.5Cu-0.3Fe Cast Alloy

Liu

Cao

Chen

2010

Metall Mater Trans A

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“…By increasing Fe content to 2.5 wt.%, their length and width increase by 25 and 4.8%, respectively [20,21]. Generally, ␤-Fe is the primary phase and the precipitation approaches the solidification onset of eutectic Al-Si when the cooling rate is increased [22,23]. Fe can form a ternary eutectic at Al-11.5% Si-0.8% Fe.…”

Section: Introductionmentioning

confidence: 99%

Improved mechanical properties in cast Al–Si alloys by combined alloying of Fe and Cu

Wang¹,

Hui²,

Wang³

et al. 2010

Materials Science and Engineering: A

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“…[4][5][6][7][8][9] Among these IMCs, b-AlFeSi and a-AlFeSi are the most common ones present in Al-Si based alloys widely used for automotive components. [10][11][12] Research effort has been focused on these two types of IMCs to control their formation during solidification. Technologically, physical processes, such as plastic deformation, [13] ultrasonic vibration [14] and electromagnetic stirring, [15] were employed to break up and/or refine such Fe-containing IMCs with some degree of success.…”

Section: Introductionmentioning

confidence: 99%

Formation of the Fe-Containing Intermetallic Compounds during Solidification of Al-5Mg-2Si-0.7Mn-1.1Fe Alloy

Wang

Fan

2018

Metall Mater Trans A

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Iron (Fe) is the most common and the most detrimental impurity element in Al alloys due to the formation of Fe-containing intermetallic compounds (IMCs), which are harmful to mechanical performance of the Al-alloy components. In this paper we investigate the formation of Fe-containing IMCs during solidification of an Al-5Mg-2Si-0.7Mn-1.1Fe alloy under varied solidification conditions. We found that the primary Fe-containing intermetallic compound (P-IMC) in the alloy is the BCC a-Al 15 (Fe,Mn) 3 Si 2 phase and has a polyhedral morphology with {1 1 0} surface termination. The formation of the P-IMCs can be easily suppressed by increasing the melt superheat and/or cooling rate, suggesting that the nucleation of the a-Al 15 (Fe,Mn) 3 Si 2 phase is difficult. In addition, we found that the IMCs with a Chinese script morphology is initiated on the {1 0 0} surfaces of the P-IMCs during the binary eutectic reaction with the a-Al phase. Both the binary and ternary eutectic IMCs are also identified as the BCC a-Al 15 (Fe,Mn) 3 Si 2 phase. Furthermore, we found that the Fe content increases and the Mn content decreases in the Fe-containing intermetallic compounds with the decrease of the formation temperature, although the sum of the Fe and Mn contents in all of the IMCs is constant.

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Effect of Cooling Rate and Fe/Mn Weight Ratio on Volume Fractions of α-AlFeSi and β-AlFeSi Phases in Al–7.3Si–3.5Cu Alloy

Cited by 47 publications

References 15 publications

Solidification of Iron-Rich Intermetallic Phases in Al-4.5Cu-0.3Fe Cast Alloy

Solidification of Iron-Rich Intermetallic Phases in Al-4.5Cu-0.3Fe Cast Alloy

Improved mechanical properties in cast Al–Si alloys by combined alloying of Fe and Cu

Formation of the Fe-Containing Intermetallic Compounds during Solidification of Al-5Mg-2Si-0.7Mn-1.1Fe Alloy

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