Influence of tool rotation speeds on mechanical and morphological properties of friction stir processed nano hybrid composite of MWCNT-Graphene-AZ31 magnesium

Sharma, Sanjay; Handa, Amit; Singh, Sahib Sartaj; Verma, Deepak

doi:10.1016/j.jma.2019.07.001

Cited by 53 publications

(23 citation statements)

References 94 publications

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“…9, during this test, the peak temperature in SZ is 632 °C. Therefore, these results show that unlike the work reported by some researchers [71,72], increasing the tool rotational speed does not always lead to better mechanical properties because of the flash formed.…”

Section: The Mechanism Of Flash Formationcontrasting

confidence: 65%

Numerical and experimental investigation of defects formation during friction stir processing on AZ91

et al. 2021

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The heat generated during friction stir processing greatly affects defects formation in the processed zone of workpieces. In this paper, numerical modeling of this process is performed to determine the influence of tool rotational and traverse speeds and hence their ratio on the thermal distribution attained during the process. The aim is to produce defect-free processed samples by selecting adequate tool speeds. The mechanisms of defects formation depending on the peak temperature are also investigated. Experiments to verify the simulation results were conducted with the same process parameters. Several traverse speeds of 20, 40, 60, and 80 mm/min and rotational speeds of 700, 1000, 1200, and 2000 rpm were used during modeling and conducting the experiments. From the numerical and experimental results, it was found that; the high-speed processing conditions (low-generated heat) can produce defects such as tunnels and grooves, and the low-speed processing conditions (high-generated heat) can cause defects such as flashes. The experimental results show that during friction stir processing with the rotational speed of 1200 rpm and the traverse speed of 60 mm/min (speed ratio of 20), no macro defects in the processed zone were observed. According to the numerical results, the peak temperature during friction stir processing with these speeds was 475 °C. At this temperature, the material softened, the structure finely equiaxed and no large scale melting zone appeared in the processed zone. The developed model can be useful to investigate the occurrence of defects associated with different tool rotational and traverse speeds. Graphic abstract

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Section: The Mechanism Of Flash Formationcontrasting

confidence: 65%

Numerical and experimental investigation of defects formation during friction stir processing on AZ91

et al. 2021

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“…Many different production methods such as casting, 30 powder metallurgy, 31 friction stir, 32 wire electric discharge machining, 33 thixomolding, 34 or in-situ process 35 , 36 have been used to reinforcing the nanomaterials to magnesium alloys. Therefore, the most preferred technique is powder metallurgy (PM), undoubtedly.…”

Section: Introductionmentioning

confidence: 99%

The effect of graphene nano-sheet (GNS) weight percentage on mechanical and corrosion properties of AZ61 and AZ91 based magnesium matrix composites

Güler

Say

Dikici

2020

Journal of Composite Materials

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In this study, the effect of graphene nano-sheets (GNSs) on mechanical and corrosion properties of AZ61 and AZ91 based composites was investigated, detail. GNSs have been successfully produced by the liquid phase exfoliation (LPE) method and then, added AZ61 and AZ91 matrix with 01, 0.2, and 0.5 wt% GNSs for the production of the composites. The composite compacts were produced by powder metallurgy technique and sintered for 2 h at 500 °C under Ar atmosphere. The composite characterizations were carried out by scanning and transmission electron microscopes (SEM, TEM), electron dispersive spectroscope (EDS), Raman spectroscopy, and X-ray diffraction. The mechanical properties and corrosion behaviors of the composites have been compared with compression tests and potentiodynamic scanning (PDS) techniques, respectively. The results showed that the compressive strength of the composites increased with increasing GNS amount in both the AZ61 and AZ91 matrix alloys. The most susceptible composites to corrosion for both AZ61 and AZ91 matrix were observed in the 0.5 wt% GNS containing structures. However, there is a certain ratio of GNS in the Mg matrix to achieve good corrosion resistance.

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“…Accordingly, gaining a uniform spreading of reinforcement particles in the matrix material composites exposes better performance. 9 , 11 , 25 The increase in the number of passes resulted in a more uniform dispersion of the reinforcement particles. Consequently, the particle clustering was reduced, which was the main reason for the hardness and wear resistance improvement.…”

Section: Resultsmentioning

confidence: 99%

“…Sharma et al. 11 considered the effect of the tool rotational speeds on the mechanical and morphological properties of a friction-stir-processed nanohybrid composite of MWCNT-graphene-AZ31 magnesium. The UTS (ultimate tensile strength) and the compressive strength increased as the rotational speed of the tool increased throughout the stirring, which indicated there was enhanced dispersal of the graphene particles in the matrix.…”

Section: Introductionmentioning

confidence: 99%

Estimation of mechanical properties of friction stir processed Al 6061/Al₂O₃-Tib₂ hybrid metal matrix composite layer via artificial neural network and response surface methodology

Khojastehnezhad

Pourasl

Bahrami

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Friction stir processing is one of the solid-state processes which can be used to modify the structure and properties of alloys. In addition, it has become one of the most promising techniques for the preparation of the surface layer composites. To pursue cost savings and a time-efficient design, the mathematical model and optimization of the process can represent a valid choice for engineers. Friction stir processing was employed to generate an Al 6061/Al2O3-TiB2 hybrid composite layer, and mechanical properties such as the hardness and wear behavior were also measured. The relationship between the hardness and wear behavior, process parameters of friction stir processing were evaluated using an artificial neural network and response surface methodology. The rotational speed (1500–1800 rpm), traverse speeds (25, 50, 100 mm/min), and the number of passes (1–4) with constant axial force (2.61 kN) were used as the input, while the hardness and weight loss values were the output. Experimentally, the results showed that the process parameters have significant effect on hardness and wear behavior of Al 6061/Al2O3-TiB2. In addition, the developed artificial neural network and response surface methodology models can be employed as alternative methods to compute the hardness and weight loss for given process parameters. The results of both models showed that the estimated values for the hardness and wear behavior of the processed zone had an error less than 0.60%, which indicated reliability, and an evaluation of the estimated values of both models and the experimental values confirmed that the artificial neural network is a better model than response surface methodology.

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Influence of tool rotation speeds on mechanical and morphological properties of friction stir processed nano hybrid composite of MWCNT-Graphene-AZ31 magnesium

Cited by 53 publications

References 94 publications

Numerical and experimental investigation of defects formation during friction stir processing on AZ91

Numerical and experimental investigation of defects formation during friction stir processing on AZ91

The effect of graphene nano-sheet (GNS) weight percentage on mechanical and corrosion properties of AZ61 and AZ91 based magnesium matrix composites

Estimation of mechanical properties of friction stir processed Al 6061/Al₂O₃-Tib₂ hybrid metal matrix composite layer via artificial neural network and response surface methodology

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Influence of tool rotation speeds on mechanical and morphological properties of friction stir processed nano hybrid composite of MWCNT-Graphene-AZ31 magnesium

Cited by 53 publications

References 94 publications

Numerical and experimental investigation of defects formation during friction stir processing on AZ91

Numerical and experimental investigation of defects formation during friction stir processing on AZ91

The effect of graphene nano-sheet (GNS) weight percentage on mechanical and corrosion properties of AZ61 and AZ91 based magnesium matrix composites

Estimation of mechanical properties of friction stir processed Al 6061/Al2O3-Tib2 hybrid metal matrix composite layer via artificial neural network and response surface methodology

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Product

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About

Estimation of mechanical properties of friction stir processed Al 6061/Al₂O₃-Tib₂ hybrid metal matrix composite layer via artificial neural network and response surface methodology