Optimization of Casting Design Parameters on Fabrication of Reliable Semi-Solid Aluminum Suspension Control Arm

Ragab, Kh. A.; Bouaicha, A.; Bouazara, Mohamed

doi:10.1007/s11665-017-2878-1

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…These effects on the morphology of such intermetallic phases are related to the positive role of the semi-solid casting process. The detrimental effect of these intermetallic phases is related to iron platelet-like and needle shapes that induce high stress concentrations and constitute a stress raiser resulting in negative effects on the mechanical performance of alloys investigated [23,24]. The solution heat treatment for 6 h nearly results in the complete dissolution of Mg 2 Si phases and partial fragmentation of Fe-phases that are hardly dissolved in the matrix.…”

Section: Sem Analysismentioning

confidence: 99%

Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys

Ragab

Bouazara

Chen

2018

Metals

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The current study aimed at analyzing the response of semisolid A357 aluminum alloys to unconventional thermal treatment cycles of T4/T6/T7 conditions. The mechanical, electrical, and microstructural characterizations of such semisolid alloys were investigated. The microstructure evolutions of Fe-intermetallic phases and strengthening precipitates were characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The mechanical failure of such semi solid A357 aluminum alloys, used for suspension automotive parts, is mostly related to cracking issues which start from the surface due to hardness problems and propagate due to severe load variations. For these reasons, the multiple thermal aging cycles, in this study, are applied to enhance the mechanical properties and to have compromised values compared to those obtained by standard thermal treatments. The results obtained in this work indicate that the heat treatment of this alloy can be optimized. The results showed that the optimum characteristics of A357 semisolid alloys were obtained by applying thermal under-aging cycle, interrupted thermal aging cycles and a T7/T6 two steps aging treatment condition. The electrical conductivity and electron microscopy were applied in this study to analyze the characteristics of hardening phases formed due to different aging cycles applied to the alloys investigated.

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Section: Sem Analysismentioning

confidence: 99%

Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys

Ragab

Bouazara

Chen

2018

Metals

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“…Such microstructural changes positively affect enhancing the ductility of aluminum alloys, which in turn improve the quality of such materials. On the other hand, the application of unconventional thermal aging treatment cycles, mainly multi temperatures aging cycles of T4/T6/T7, can further induce optimum compromise values of strength and ductility by inducing different sizes of Mg 2 Si hardening precipitates [6,7,8]. The precipitation of nano-sized β-Mg 2 Si particles is considered as the main strengthening mechanism of Al-Si-Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Quality Index Charts of Al-Si-Mg Semi Solid Alloys Subjected to Multiple Temperatures Aging Treatments and Different Quenching Media

2019

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The use of quality index charts is considered as an effective mean for evaluating the mechanical performance of Aluminum alloys for industrial engineering applications. The current study was carried out to investigate the influences of multiple-interrupted temperatures aging and quenching media (water versus air) on the quality index performance and precipitations evolution of A357 Aluminum semi solid alloys. Regarding the lack of similar investigations applied on such alloys, the quality index charts were generated for Al-Si-Mg semi solid castings based on its tensile properties. These charts are used to determine the quality index, in MPa, as a simple mean for compromising the strength and ductility together in one value using the Drouzy model. The multiple temperatures aging cycles were applied to improve the quality index values of Al-Si-Mg semi solid alloys for enhancing its characteristic and performance to resist the mechanical failures relating to automotive dynamic parts. The evolution of Mg2Si hardening precipitates, formed for specific thermal aging cycles, was investigated using transmission electron microscopy (TEM). The results obtained in this work revealed that the optimum quality index values were obtained by the application of T6-thermal under-aging treatment cycles. The regression models, using a statistical design of experiments, indicated that the optimum strength and high-quality index values were obtained by the application of interrupted thermal aging cycles, mainly C2,3-T6/T4/T7 conditions.

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“…Ragab et al [24] considered discretized momentum expressions in reference to the obtained u j nodal velocities, and B ij coefficients. Thus, the result of pressure gradients can be partitioned as:…”

Section: Discretization For Continuity Equationmentioning

confidence: 99%

Mathematical Modelling for Furnace Design Refining Molten Aluminum

Saldívar

Martínez

Valdés

et al. 2021

Metals

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The design of an aluminium melting furnace has faced two challenges: mathematical modelling and simulative optimization. This paper first uses fluid dynamics to model the aluminium process mathematically. Then, the model is utilized to simulate a round shaped reverberatory furnace for melting aluminium alloys. In order to achieve the highest thermal efficiency of the furnace, modelling and simulation are performed to predict complex flow patterns, geometries, temperature profiles of the mixture-gas air through the main chamber, as well as the melting tower attached to the furnace. The results led to the establishment of optimal position and angle of the burner, which are validated through physical experiments, ensuring recirculation of the combustion gases through the melting chamber and the melting tower. Furthermore, a proper arrangement of refractory materials is derived to avoid heat losses through the outer surface of the furnace. Temperature profiles are also determined for the optimization to arrive at the final design of the furnace. Compared with manual designs previously practiced, the simulation-based optimal design of furnaces offers excellent guidance, an increase in the aluminium processing and magnesium removal for more refined alloys, and an increased processing rate of aluminium chip accession.

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Optimization of Casting Design Parameters on Fabrication of Reliable Semi-Solid Aluminum Suspension Control Arm

Cited by 11 publications

References 16 publications

Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys

Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys

Quality Index Charts of Al-Si-Mg Semi Solid Alloys Subjected to Multiple Temperatures Aging Treatments and Different Quenching Media

Mathematical Modelling for Furnace Design Refining Molten Aluminum

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