Rheological Characterization and Performance Evaluation of Magnetorheological Finishing Fluid

Kumar, Vikas; Kumar, Raj; Kumar, Hemantha

doi:10.29252/jafm.13.01.29763

Cited by 8 publications

(5 citation statements)

References 23 publications

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“…11b) has been best fitted which is based on the value of the coefficient of regression. The optimized fluid (based on analysis of variance results) exhibits a significant drop in the average surface roughness value [50].…”

Section: Herschel-bulkley Fluid Modelmentioning

confidence: 99%

Magnetorheological fluids: A comprehensive review

Chauhan,

Kumar,

Sham

2024

Manufacturing Rev.

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The magnetorheological (MR) fluids contain magnetic micro-sized iron particles, non-magnetic-based fluid, and some additives in order to mitigate sedimentation and agglomeration. The various carrier fluids used in the preparation of MR fluids are mineral oil, silicon oil, castor oil, soybean oil, kerosene, synthetic oils, honge oil, organic oil, water-based oils, etc. However, for obtaining better vibration control, silicone oil is the most preferred one due to its higher viscosity index, lower friction characteristics, higher flash point, and higher shear strength. The MR fluids have various application areas such as dampers, prosthetic knees, valves, brakes, clutches, finishing processes etc. The dampers containing MR fluids are used in automobile cushioning for enhancing passenger comfort and MR suspensions significantly improve steering stability in vehicles. In case of MR brakes, the braking torque on the rotating disks is controlled using the generated shear stress. The carbonyl iron (CI) particles exhibit better rheological characteristics as compared to electrolytic iron (EI) particles. The use of MR fluids produces stable and natural limb movement in orthoses, lower limb prostheses, and exoskeletons. The MR fluids also prove to be very significant in polishing applications. There are various issues with preparation methods and difficulties in the storage of MR fluids. The problems encountered in the synthesis of MR fluids include sedimentation, agglomeration, in-use thickening, corrosion, erosion, etc. The impact of particle proportion, particle shapes, and size has been influential in evaluating MR characteristics. The viscosity and shear stress of MR fluid have been mitigated at higher values of temperature and even CI particles get oxidized at higher temperatures. The CI particles as compared to EI particles are the majority favourable particles used for dispersing state within the MR fluids due to their higher value of saturation magnetization, more availability, and lesser cost. The small-sized particles led to lower wettability, whereas larger-sized particles accounted for an increased sedimentation rate. The currently available MR fluids cost is still on the higher side and the preparation of economical MR fluid is still a big challenge for the researchers. The MR fluids storage is also a big concern. The future scope of MR fluid may be in heavy industries such as nuclear, shipbuilding, oil and gas, space and aviation, etc. to achieve the desired damping response.

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Section: Herschel-bulkley Fluid Modelmentioning

confidence: 99%

Magnetorheological fluids: A comprehensive review

Chauhan,

Kumar,

Sham

2024

Manufacturing Rev.

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“…V Kumar and other scholars conducted an experimental study on the influence of the composition of magnetorheological polishing fluid on its yield stress through the Taguchi experimental design. The rheological data obtained from the magnetic Rheometer (MCR-102) was characterized by Bingham Plastics, Herschel Bulkley and Casson fluid constitutive models, and used for the finishing of biocompatible stainless steel AISI 316L, with the average surface roughness reduced to 58nm [8]. Scholars such as Jayant studied the magnetorheological abrasive flow finishing process and found that changes in the magnetic field can adjust the viscosity of the magnetorheological fluid and the distribution of abrasive particles.…”

Section: Introductionmentioning

confidence: 99%

Research on Magnetorheological Ultra Precision Processing Technology and Key Technologies for Semiconductor Wafers

Li,

Tang,

Zhang

et al. 2024

Preprint

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As a key process in the manufacturing of integrated circuit chips, the quality and effectiveness of wafer cutting directly affect the performance of the chip. Magnetorheological machining is a flexible machining technique that changes the rheological properties of polishing fluid through internal gradient electromagnetic fields, thereby achieving material removal and surface error correction. This article focuses on magnetorheological machining technology and conducts simulation and experimental research on wafers. By simulating the mechanical properties of the wafer surface under different polishing disc speeds, excitation gaps and particle sizes, the simulation obtained the optimal processing parameters through experiments and data analysis, and finally obtained a smooth wafer surface with a surface roughness of Ra 0.042 µm.

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“…10 These unique effects have made MRFs of great interest in both academic fields and industrial applications, 11 including dampers, [12][13][14] adsorbents, 15 robotics, 16,17 sensors, 18 and polishing. 19,20 Although many MR devices have successfully entered the prototype stage, commercialization has not yet been achieved due to the lack of effective MRFs with high stability and MR effects.…”

Section: Introductionmentioning

confidence: 99%

“…When the stress caused by the shear load exceeds the yield stress, the highly organized structure deforms, such that the hydrodynamic force becomes dominant over the electrostatic force 10 . These unique effects have made MRFs of great interest in both academic fields and industrial applications, 11 including dampers, 12–14 adsorbents, 15 robotics, 16,17 sensors, 18 and polishing 19,20 . Although many MR devices have successfully entered the prototype stage, commercialization has not yet been achieved due to the lack of effective MRFs with high stability and MR effects.…”

Section: Introductionmentioning

confidence: 99%

Core/shell magnetite/copolymer composite nanoparticles enabling highly stable magnetorheological response

Han

Wang

Rui

et al. 2022

Int Journal of Mech Sys Dyn

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Magnetorheological fluids (MRFs) have been successfully used in a variety of smart control systems, but are still limited due to their relatively poor settling stability. Herein, a core/shell-structured Fe 3 O 4 /copolymer composite nanoparticle is synthesized as a new candidate material for stimulus-responsive MRFs to tackle the limitation of the long-term dispersion stability. Aniline-co-diphenylamine copolymers (PANI-co-PDPA) are loaded onto the surface of Fe 3 O 4 nanoparticles, providing a lighter density and sufficient active interface for the dispersion of magnetic particles in the carrier medium. The features of the Fe 3 O 4 /copolymer composite nanoparticles, including morphology, compositional, and crystalline properties, are characterized. An MRF is prepared by suspending Fe 3 O 4 /copolymer composite nanoparticles in a nonmagnetic medium oil, and its rheological properties are assessed using a controlled shear rate test and dynamic oscillation tests using a rotational rheometer. Rheological models including the Bingham model and the Herschel-Bulkley model are fitted to the flow curves of the MRF. The obtained Fe 3 O 4 /copolymer composite shows soft-magnetic properties, as well as greater density adaptability and higher stability, compared to Fe 3 O 4 . Moreover, the sedimentation testing provides information about the dispersion stability characteristics of MRF and shows a good correlation with high-stability magnetorheological (MR) response. The Fe 3 O 4 /copolymer-based MRF with a tunable and instantaneous MR response is considered a promising material for smart control applications.

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Rheological Characterization and Performance Evaluation of Magnetorheological Finishing Fluid

Cited by 8 publications

References 23 publications

Magnetorheological fluids: A comprehensive review

Magnetorheological fluids: A comprehensive review

Research on Magnetorheological Ultra Precision Processing Technology and Key Technologies for Semiconductor Wafers

Core/shell magnetite/copolymer composite nanoparticles enabling highly stable magnetorheological response

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