Effect of iron on microstructure and mechanical properties of primary AlSi7Mg0.3 alloy

Sacinti, Merve; Cubuklusu, Emre; Birol, Yücel

doi:10.1080/13640461.2016.1250035

Cited by 11 publications

(7 citation statements)

References 23 publications

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“…However, similar observations of a reduction of the mechanical properties on addition of Fe were reported for other Al-Si based alloys with iron intermetallics. [25][26][27] Sacinti et al 26 studied the effect of iron intermetallics on the mechanical properties of Al-7Si-0.3 Mg and reported that the size of the b platelets was doubled when the Fe content doubled, which eventually led to a three-fold reduction in the elongation value. Ravi et al 27 also concluded that the higher the Fe content in the alloy is, the lower the mechanical properties of the alloy.…”

Section: Resultsmentioning

confidence: 99%

Effect of Fe Intermetallics on Microstructure and Properties of Al-7Si Alloys

Mathew

Remy

Williams

et al. 2019

JOM

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The present work deals with the effect of iron intermetallics on the microstructure and mechanical properties of Al-7% Si alloys. Two different iron additions were made, 0.6% Fe and 2% Fe, to study the effect of iron intermetallics on Al-Si alloys. Microstructure property correlations were carried out using SEM-EDS and tensile testing of alloys. Microstructure results show that the rise in iron content significantly increased the average size, thickness and number of intermetallic particles in the alloys. Nano-indentation study shows that the iron intermetallics are too brittle compared with the primary aluminium. Moreover, the hardness and Young's modulus of iron intermetallics are higher than those of primary aluminium. Tensile test results show that there is no significant difference in strength levels between Al-7%Si and Al-7Si-0.6Fe alloys. However, an increase in iron from 0.6% to 2% resulted in a significant decrease in tensile strength and elongation of the alloys. Two-dimensional SEM studies suggest that the increased number of needle-shaped b-phase intermetallic particles formed because of increased amounts of Fe could be the reason for early failure of the alloy. To further understand the early failure of iron-containing alloys, the fractured tensile specimens were studied using the 3D x-ray tomography technique. XCT results show that the failure in tensile testing of 2% Fe alloy was not mainly due to breaking of brittle b-phase intermetallic particles, but due to the morphology and particle-matrix interface debonding. XCT shows that the needleshaped particles are long, sharp-edged platelets in 3D, which act as stress raisers for crack initiation and propagation along the interphase.

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Section: Resultsmentioning

confidence: 99%

Effect of Fe Intermetallics on Microstructure and Properties of Al-7Si Alloys

Mathew

Remy

Williams

et al. 2019

JOM

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“…With an iron increase of 0.15%, the yield strength is not affected or can even be slightly enhanced 27 , but the elongation is reduced by more than 35%. 28,29 This fact can explain the elongation ratios of the tested alloys. Furthermore, the eutectics show significant levels of zinc and magnesium; hence, * T-(Al 2 Mg 3 Zn 3 ) precipitates can be identified.…”

Section: Resultsmentioning

confidence: 87%

Analysis of the Mechanical Properties of Secondary AlZnMg(Cu) Die-Cast Alloys

Silmbroth

Bozorgi

2020

Inter Metalcast

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In this work, the development of AlZnMg(Cu) alloys was performed by thermodynamic simulations and experimental tests. With calculations, the solidification processes and phase compositions could be predicted. As secondary casting alloys, the selected compositions of AlZn4Mg3-Cu(Fe) and AlZn5Mg4Cu have higher contents of alloying elements, such as iron and silicon, and were successfully processed with a cold-chamber die casting machine. In addition, an energy-and time-saving optimization of the material properties was performed by a modified heat treatment (T6*) with a total time of only 12 h. The alloys were evaluated based on the characterization of their mechanical properties and the analysis of their microstructures. In particular, the elimination of cost-intensive alloying elements and the application of a modified heat treatment method clearly show the potential of AlZnMg(Cu) die-cast alloys for future industrial use.

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“…The presence of higher amount of Fe, higher content of Fe-rich phases, and porosity did not lead to a rapid decrease of mechanical properties ( Figure 4 , Table 4 ). Sacinti et al [ 39 ] demonstrated that increasing shrinkage porosity caused by the growing of an amount of β-Al 5 FeSi, leads to a 3-fold decrease in the tensile elongation values. Moreover, the higher Fe content led to an increase in the mechanical properties ( Figure 4 ), but the increase did not exceed the common measurement error of 7%, according to standard (in comparison to alloy A) ( Figure 5 ).…”

Section: Resultsmentioning

confidence: 99%

The Effect of the β-Al5FeSi Phases on Microstructure, Mechanical and Fatigue Properties in A356.0 Cast Alloys with Higher Fe Content without Additional Alloying of Mn

et al. 2021

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Secondary-cast aluminum alloys have increasing industrial applications. Their biggest deficiency is their impurity content, especially Fe, which has low solubility in Al and almost all the content creates intermetallic phases. This work examines the effect of higher Fe content on the microstructure and properties of A356.0 alloy. At the same time, no other possibility existed to affecting the brittleness of the formation of the β phases. The calculation of Fecrit, ratio of Mn/Fe, quantitative and computed tomography analysis of porosity and Fe plate-like phases, measurement of mechanical and fatigue properties, and fractography analysis were performed in this study. The results show that gravity die casting into a sand mold, and the non-usage of Mn addition or heat treatment, do not have a negative effect on increasing the size of the Fe-rich plate-like phases. The longest Fe-rich phases have limited the pore growth and ratios, but their higher thickness led to greater porosity formation. The mechanical and fatigue properties correlate with the Fecrit level and the highest were for the experimental alloy with 0.454 wt.% of Fe. The experimental results confirmed the fact that if the Fe plate-like phases have a length of up to 50 µm, the fatigue properties depend more on the size of porosity. If the length of the Fe needles is more than 50 µm, then the properties are mainly affected by the length of these Fe phases.

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Effect of iron on microstructure and mechanical properties of primary AlSi7Mg0.3 alloy

Cited by 11 publications

References 23 publications

Effect of Fe Intermetallics on Microstructure and Properties of Al-7Si Alloys

Effect of Fe Intermetallics on Microstructure and Properties of Al-7Si Alloys

Analysis of the Mechanical Properties of Secondary AlZnMg(Cu) Die-Cast Alloys

The Effect of the β-Al5FeSi Phases on Microstructure, Mechanical and Fatigue Properties in A356.0 Cast Alloys with Higher Fe Content without Additional Alloying of Mn

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