Optimization studies of stir casting parameters and mechanical properties of TiO2 reinforced Al 7075 composite using response surface methodology

Adediran, Adeolu Adesoji; Akinwande, Abayomi Adewale; Balogun, Oluwatosin Abiodun; Olorunfemi, Bayode Julius; M., Saravana Kumar

doi:10.1038/s41598-021-99168-1

Cited by 47 publications

(11 citation statements)

References 29 publications

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“…The stirring operation was performed for 22.5 minutes at an average stirring rate of 574 rpm. Casting was then carried out on prepared sand moulds at a pouring temperature of about 780 °C [16].…”

Section: Methodsmentioning

confidence: 99%

Influence of SiO2 form the rice husk ash and coal fly ash particles on the mechanical behaviour and grain characteristics of the stir-casted hybrid composites

Olorunyolemi

Ogunsanya

Akinwande

et al. 2022

Preprint

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The grain characteristics and mechanical properties of aluminium composites reinforced with Rice Husk Ash (RHA) and Coal Fly Ash (CFA), produced by double stir casting in a sand mould, were investigated. As-cast Al.6063 alloys contained eutectic silicon with sharp, long elongated laths which reduces strength and limits their applications. Cold rolling operation was selected to break those eutectic laths and refine the grains for the purpose of property enhancement. RHA and CFA were chosen because they are economical, possess low density and are available in enormous quantities as solid waste by-products. They contain a substantial concentration of SiO2 and serve as a viable reinforcement for improving mechanical properties of aluminium composites. The reinforcements were added in varying concentrations (1.5 and 3.0 wt.%). Six specimens were fabricated of which five were cold-rolled. Image J and Origin software was used in evaluating the average grain size of the fabricated alloys and its composites. The results were discussed with the help of grain size distribution and profile plots. Structural and composition analysis were done using scanning electron microscopy (SEM), EDX and XRD. Hardness and tensile tests were conducted on the aluminium composites. The results indicated that Al.6063-3 wt.% CFA composite demonstrated the best balance of mechanical properties with hardness of 79 HV, tensile strength of 151 MPa and average grain size of 11.39 µm. This improvement is linked to the effect of SiO2 in CFA and plastic deformation of the specimens.

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Section: Methodsmentioning

confidence: 99%

Influence of SiO2 form the rice husk ash and coal fly ash particles on the mechanical behaviour and grain characteristics of the stir-casted hybrid composites

Olorunyolemi

Ogunsanya

Akinwande

et al. 2022

Preprint

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“…These factors are directly influenced by the casting processing parameters such as processing temperature, stirring time, stirring speed, preheat temperature, blade angle, melt temperature, particle feed rate, etc. When these parameters are well controlled, the factors are significantly improved and Al-SiCp composites of better properties are produced (Adebisi et al, 2017;Verma & Khvan, 2019;Adediran et al, 2021). Adebisi and Ndaliman (2015) studied the influence of process parameters (reinforcement fraction, stirring speed, processing temperature and processing time) on wear and density properties of AA6061-SiCp composites produced using stir casting.…”

Section: Introductionmentioning

confidence: 99%

Study on the Optimization of Surface Modification Processing of SiCp and Tribological Properties of AA6061-SiCp based Composites

Odiwo

Adeyemi

Abdulwahab

et al. 2023

IJEMM

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The unique property combination of Al/SiCp based composites make them very attractive for applications in automotive and aerospace industries. The choice of composite materials for these applications is directly influenced by their inherent properties which are a function of the processing route employed. Like other processing parameters, surface modification treatment of SiCp can play a major role in determining the properties of Al/SiCp composites. In this study, the effects of SiC reinforcement (wt%) fractions (SRF), surface oxidation temperature (SOT) and preheating temperature (PT) parameters on the wear and friction properties of stir-cast Al-SiCp based composite were investigated. Experimental data and models are generated and analyzed based on a three-factors-five-level central composite design (CCD) and analysis of variance (ANOVA). The empirical models developed for wear rate and coefficient of friction (COF) considering the pre-processing parameters adequately predicts the Al-SiCp properties with the silicon carbide reinforcement (wt%) fraction emerged as the most influencing factor. The goal of the optimization process is to minimize both wear rate and COF. For wear rate, SRF at 44.49 % contribution had the most influence on wear rate, while SOT and PT had 0.65 % and 1.03 % influence on wear rate respectively. For COF, SRF also showed highest influence of 35.48 % on COF, while SOT and PT had 0.047% and 2.66% influence on COF respectively. From the optimization analysis, the set of conditions that simultaneously optimizes both wear rate and COF are 10% SiC weight (SW), 1234°C surface oxidation temperature (SOT), and 376.2°C preheat temperature (PT). The resulting responses at this optimized condition are minimum wear rate of 0.11 mm3/m and COF of 0.11 with a confidence and desirability level of 1.

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“…ZrSiO 4 is the ultimate oxidization resistance mostly involved in several productions [11]. Adediran et al fabricated Al7075-TiO 2 composites via STC, the ultimate tensile strength was exhibited better while considering the STC parameters of temperature about 750 °C and stirrer speed of 500 rpm [12]. Zhu et al studied the fabrication of Al6082 with nano SiC composites done by squeeze casting, and TS and YS were improved in T6-treatment process than base alloy [13].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Stir-Squeeze Casting Process Parameters on Mechanical Property and Density of Aluminum Matrix Composite

Vijayakumar¹,

Kumar

Manickam

et al. 2022

Advances in Materials Science and Engineering

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This present investigation focusing on preparation of Al-based hybrid composites in which Al6082 is engaged as the main alloy reinforced with two reinforcements of ZrSiO₄/TiC. The combination of the stir-squeeze process helps to make different specimen by change of four parameters such as stir speed, stir time, reinforcements, and squeeze pressure. In this process, two reinforcements are reserved as constant about 7.5 wt%. The four levels of each parameter are stir speed (300, 400, 500, and 600 rpm), stir time (10, 15, 20, and 25 min), reinforcement (2.5, 5, 7.5, and 10 wt%), and squeeze pressure (50, 60,70, and 80 MPa). According to the L16 orthogonal array Taguchi design, the specimens are created to analyze the mechanical properties of tensile strength and hardness along with porosity. In addition, the optimization technique is used to determine the optimal parameter on improving tensile strength. The optimization process can be assisted by the software namely Minitab-17 which helps to study analysis of variance, regression model, and contour plots. The observed result of ANOVA showed that stir speed (41.8%) is the maximum influenced parameter that increases TS, followed by squeeze pressure (25.7%), stir time (12.7%), and reinforcement (1.96%), and optimum tensile strength is found at the parameters of stir speed 600 rpm, stir time 10 min, reinforcement 2.5 wt%, and squeeze pressure 80 MPa. The fractured surface of tensile strength also examined by the SEM test. The combined parameters of S4-T1-R1-P4 achieve the highest TS, and it is observed that there are nearly no pore defects and good diffusion as a result of the reinforcements to be properly mixed. It is noticeable that the TiC and Al 6082 matrix, as well as the various ZrSiO4 exhibit stronger bonds.

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Optimization studies of stir casting parameters and mechanical properties of TiO2 reinforced Al 7075 composite using response surface methodology

Cited by 47 publications

References 29 publications

Influence of SiO2 form the rice husk ash and coal fly ash particles on the mechanical behaviour and grain characteristics of the stir-casted hybrid composites

Influence of SiO2 form the rice husk ash and coal fly ash particles on the mechanical behaviour and grain characteristics of the stir-casted hybrid composites

Study on the Optimization of Surface Modification Processing of SiCp and Tribological Properties of AA6061-SiCp based Composites

The Effect of Stir-Squeeze Casting Process Parameters on Mechanical Property and Density of Aluminum Matrix Composite

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