Effects of Stirring Duration and Casting Temperature in Ultrasonic Assisted Stir Casting of Al A356 Matrix Composites

Yüksel, Tuğçe Büşra; Aybarç, Uğur; Ertuğrul, Onur

doi:10.2339/politeknik.629473

Cited by 2 publications

(2 citation statements)

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“…When the stirring speed is increased from 400 min À 1 to 600 min À 1 , a decrease in particle size is seen, while the particle's sphericity increases, Figure 6a. This phenomenon can be explained by the fact that when stirring speed increases, the dendritic morphology of the primary phase of aluminium breaks down into finer grains due to the shearing effect of the rotating stirrer, and the particles take on the shape of globules to minimize surface energy [28]. The lower stirring speed promotes more agglomeration in the melt and reduces the possibility of fracture nucleation inside the melt under shear.…”

Section: Effect Of Stirring Speed On the Degree Of Sphericity And Par...mentioning

confidence: 99%

“…Stirring time analysis confirms that the nature of the matrix depends on time. The lower stirring time cannot completely modify the coarser morphology into the spherical form of the α-aluminium phase in the microstructures [28]. At the low stirring time (5 min), when the stirrer is rotating inside the molten metal, the deformation of the material will start breaking the chunks due to the applied shear force.…”

Section: Effect Of Stirring Time On the Degree Of Sphericity And Part...mentioning

confidence: 99%

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Experimental investigation and optimization of morphological characteristics in mechanically agitated aluminium 6061‐fly ash cenosphere composite

Anand,

Tiwari,

Prakash

2023

Materialwissenschaft Werkst

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The current work examines the results of an experimental study for the liquid casting of an aluminum‐6061‐5 weight % fly ash cenosphere composite by employing stir casting. The studies were conducted using the response surface methodology (central composite design L16 experiments) with three process factors (stirring temperature, stirring speed, and stirring time) at three different levels. An attempt has been made to determine the impact of process variables on the degree of sphericity and particle size. The optimal processing conditions for the best degree of sphericity (0.765) and particle size (93.227 μm) are identified as A−1, B+1, and C+1, corresponding to a stirring temperature of 670 °C, a stirring speed of 600 min−1, and 15 min stirring time. Based on the analysis of variance analysis, the degree of sphericity and particle size evolution is significantly influenced by stirring time followed by temperature and speed. Additionally, a mathematical model for the evaluation of the degree of sphericity and particle size in the primary‐aluminium phase has been developed and it shows good consensus with the experiments.

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Section: Effect Of Stirring Speed On the Degree Of Sphericity And Par...mentioning

confidence: 99%

Section: Effect Of Stirring Time On the Degree Of Sphericity And Part...mentioning

confidence: 99%

Experimental investigation and optimization of morphological characteristics in mechanically agitated aluminium 6061‐fly ash cenosphere composite

Anand,

Tiwari,

Prakash

2023

Materialwissenschaft Werkst

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Development, modelling and optimization of process parameters on the tensile strength of aluminum, reinforced with pumice and carbonated coal hybrid composites for brake disc application

Ibrahim,

Yawas,

Thaddaeus

et al. 2024

Sci Rep

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This study focuses on optimizing double stir casting process parameters to enhance the tensile strength of hybrid composites comprising aluminum alloy, brown pumice, and coal ash, intended for brake disc applications. Analytical techniques including X-ray fluorescence, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy were employed to characterize the composite constituents. The Taguchi method was utilized for experimental design and optimization to determine the optimal weight compositions of brown pumice and coal ash, as well as stir casting parameters (stirrer speed, pouring temperature, and stirring duration). Regression analysis was employed to develop a predictive mathematical model for the tensile strength of the hybrid composites and to assess the significance of process parameters. The optimized composite achieved a predicted tensile strength of 186.81 MPa and an experimental strength of 190.67 MPa using 7.5 vol% brown pumice, 2.5 vol% coal ash, a pouring temperature of 700 °C, stirrer speed of 500 rpm, and stirring duration of 10 min. This represents a 52.23% improvement over the as-cast aluminum alloy’s tensile strength. Characterization results revealed that brown pumice and coal ash contain robust minerals (SiO2, Fe2O3, Al2O3) suitable for reinforcing metal matrices like aluminum, titanium, and magnesium. Thermogravimetric and differential thermal analyses demonstrated thermal stability up to 614.01 °C for the optimized composite, making it suitable for brake disc applications.

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Effects of Stirring Duration and Casting Temperature in Ultrasonic Assisted Stir Casting of Al A356 Matrix Composites

Abstract: Bu makaleye şu şekilde atıfta bulunabilirsiniz(To cite to this article): Yuksel T., Aybarc U. and Ertugrul O., "Effects of stirring duration and casting temperature in ultrasonic assisted stir casting of Al A356 matrix composites",

Cited by 2 publications

References 25 publications

Experimental investigation and optimization of morphological characteristics in mechanically agitated aluminium 6061‐fly ash cenosphere composite

Experimental investigation and optimization of morphological characteristics in mechanically agitated aluminium 6061‐fly ash cenosphere composite

Development, modelling and optimization of process parameters on the tensile strength of aluminum, reinforced with pumice and carbonated coal hybrid composites for brake disc application

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