Effect of heat treatment and Fe content on the microstructure and mechanical properties of die-cast Al–Si–Cu alloys

Yang, Hailin; Ji, Shouxun; Fan, Z.

doi:10.1016/j.matdes.2015.07.074

Cited by 80 publications

(25 citation statements)

References 22 publications

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“…Therefore, a soft alloy matrix (such as ductile Al-Mg matrix) is necessary for high-Fe alloy. On the other side, it was found that Fe-rich phases in aluminium alloys are helpful in improving the yield strength with the scarification of ductility [8]. Besides, the addition of Mn in Al-Mg alloys can modify Al3Fe to Al6(Fe, Mn), and the increased cooling rate can significantly refine the Al6(Fe, Mn) phase.…”

Section: Introductionmentioning

confidence: 99%

The Formation of Al6(Fe, Mn) Phase in Die-Cast Al–Mg Alloys

Zhu

2020

The Minerals, Metals &Amp; Materials Series

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In aluminium alloys, iron is a common impurity as it is unavoidably picked up in practice. The excessive Fe is strongly prone to form various intermetallic phases. These Fe-rich intermetallics are generally brittle and act as stress raisers to weaken the coherence with Al matrix, therefore decreasing elongation. However, Fe addition in Al-Mg alloys may be beneficial because of the improvement in the yield strength with the scarification of ductility of die-cast aluminium alloys. The morphology of intermetallic phases has a vital effect on the properties of aluminium alloys. In the present work, the 3D morphology of Al6 (Fe, Mn) in diecast Al-Mg-Mn alloys with different levels of Fe contents were revealed. The formation of Al6 (Fe, Mn) was also studied through crystal features and solidification behaviours.

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Section: Introductionmentioning

confidence: 99%

The Formation of Al6(Fe, Mn) Phase in Die-Cast Al–Mg Alloys

Zhu

2020

The Minerals, Metals &Amp; Materials Series

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“…Therefore, Al-Si cast alloys are commonly used materials for automotive engine components, as reported in [3][4][5][6]. However, the manufacturing process, as well as the subsequent heat treatments, must be considered as they possess distinctive impacts on the resulting mechanical properties [7][8][9]. As such cast aluminum components are also exposed to elevated temperatures during service, the characterization of the material properties under these conditions is inevitable.…”

Section: Introductionmentioning

confidence: 99%

Application of a area -Approach for Fatigue Assessment of Cast Aluminum Alloys at Elevated Temperature

Aigner

Garb

Leitner

et al. 2018

Metals

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This paper contributes to the effect of elevated temperature on the fatigue strength of common aluminum cast alloys EN AC-46200 and EN AC-45500. The examination covers both static as well as cyclic fatigue investigations to study the damage mechanism of the as-cast and post-heat-treated alloys. The investigated fracture surfaces suggest a change in crack origin at elevated temperature of 150 ∘ C. At room temperature, most fatigue tests reveal shrinkage-based micro pores as their crack initiation, whereas large slipping areas occur at elevated temperature. Finally, a modified a r e a -based fatigue strength model for elevated temperatures is proposed. The original a r e a model was developed by Murakami and uses the square root of the projected area of fatigue fracture-initiating defects to correlate with the fatigue strength at room temperature. The adopted concept reveals a proper fit for the fatigue assessment of cast Al-Si materials at elevated temperatures; in detail, the slope of the original model according to Murakami should be decreased at higher temperatures as the spatial extent of casting imperfections becomes less dominant at elevated temperatures. This goes along with the increased long crack threshold at higher operating temperature conditions.

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“…Iron addition was significant for further improving the tribological characteristics of the alloy. But nowadays standard alloys include in small quantities most of the elements mentioned above [7]. A combination of all these elements helps in changing the structure of the primary and eutectic Silicon from coarse needle like of plate to a globular form.…”

Section: Introductionmentioning

confidence: 99%

Study of Mechanical and Wear Properties of Stir-Cast Al-Si-Cu alloy

Namboodiri¹,

Ilangovan²

2018

IJET

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The present work deal with an investigation of the mechanical and wear properties of eutectic Al-12.8%Si-2.5%Cu under as cast and homogenized conditions. The alloy was melted in a ceramic crucible, stirred and gravity poured into a metal mold and was then cooled under atmosphere. The stirring parameters include a stirrer speed of 400rpm at a melt temperature of 750 0 C for about 10 minutes. The cast specimens were homogenized in a nitrogen atmosphere crucible at a temperature of 350 0 C for 8 hours and furnace cooled to room temperature. The microstructure of as cast and homogenized specimen were studied under SEM. The results of SEM study showed that the Si particles were more evenly dispersed around the -Al matrix after homogenization. This even dispersion of Si particles led to an increase in the hardness and ultimate tensile strength of the alloy. The dry sliding wear behavior was studied using a pin-on-disc machine. It is seen that the wear rate reduced with increase in sliding speed. The EDAX analysis of worn surface showed the phenomenon of lamination. It is concluded that the oxide layer formation was also a reason for increase in wear resistance of the material.

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Effect of heat treatment and Fe content on the microstructure and mechanical properties of die-cast Al–Si–Cu alloys

Cited by 80 publications

References 22 publications

The Formation of Al6(Fe, Mn) Phase in Die-Cast Al–Mg Alloys

The Formation of Al6(Fe, Mn) Phase in Die-Cast Al–Mg Alloys

Application of a area -Approach for Fatigue Assessment of Cast Aluminum Alloys at Elevated Temperature

Study of Mechanical and Wear Properties of Stir-Cast Al-Si-Cu alloy

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