Influence of grit geometry and fibre orientation on the abrasive material removal mechanisms of SiC/SiC Ceramic Matrix Composites (CMCs)

Luna, Gonzalo García; Axinte, Dragoş; Novovic, Donka

doi:10.1016/j.ijmachtools.2020.103580

Cited by 65 publications

(5 citation statements)

References 28 publications

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“…Nguyen and Butler used the density and sharpness of abrasive grains and the coarseness of the wheel to predict grinding performance [6]. Other researches have taken a different approach: generating uniform grain-like features on the grinding wheel and thus controlling the surface topography [7] in an attempt to achieve a predictable grinding process. In most of the above studies, the reason for quantifying the wheel topography was to predict grinding performance.…”

Section: Introductionmentioning

confidence: 99%

The effects of grit properties and dressing on grinding mechanics and wheel performance: Analytical assessment framework

Macerol

Franca

Dražumerič

et al. 2022

International Journal of Machine Tools and Manufacture

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Section: Introductionmentioning

confidence: 99%

The effects of grit properties and dressing on grinding mechanics and wheel performance: Analytical assessment framework

Macerol

Franca

Dražumerič

et al. 2022

International Journal of Machine Tools and Manufacture

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“…Luna et al [8] evaluated the influence of grit geometry and fiber orientation on the abrasive material removal mechanisms of SiC/SiC ceramic matrix composites (CMCs). They demonstrated that the shape of the abrasive grits has a stronger influence on the measured process forces.…”

Section: Cmc Abrasive Machiningmentioning

confidence: 99%

Wear of Abrasive Tools during CMC Machining

Girot Mata,

Renderos Cartagena,

Alonso Pinillos

et al. 2023

Machines

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Machining CMCs under productivity conditions while limiting tool wear and material damage is a challenge for applications such as jet aircraft engines and industrial turbines. This contribution focused on developing a method to characterize the wear of abrasive tools based on fractal dimensions. This solution allows characterization of the state of the tool after each machining and identification of the type of damage to the tool (regular wear of the diamond grains, cleavage, or breakage) and its influence on the cutting forces, in addition to damage to the machined material and the quality of the machined surface. Thus, the chipped area and the maximum chipping are directly associated with the fractal dimension of the tool surface and the metal removal rate of the process. The quality of the surface (Sa, Sz, and Sq) is associated with the fractal dimension of the surface of the tool characterizing the state of the grinding wheel and the radial depth of cut ae characterizing the engagement of the tool in the CMC material. Moreover, the results also demonstrated that the use of an abrasive tool associated with cutting conditions close to milling and not grinding is a viable solution.

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“…During the assembly and connection of carbon ceramic components with other parts, it becomes necessary to create numerous through holes and blind holes for riveting and helical connections. However, due to its inherent characteristics of high brittleness, heterogeneity, anisotropy, and weak interlayer bonding strength, processing this material often leads to defects such as tool wear, circularity errors, burrs, tearing or crumbling [3][4]. Consequently, making hole is a challenging task for this typical hard and brittle material [5][6].…”

Section: Introductionmentioning

confidence: 99%

Study on removal mechanism and surface quality in helical grinding 2.5D-Cf/SiC composites

Zhou,

Chen,

Liu

et al. 2024

Preprint

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Carbon fiber reinforced ceramic matrix composites have excellent heat resistance and wear resistance, making them extensively utilized in the aviation and aerospace industries. However, processing carbon ceramics is challenging due to the inherent difficulty. Traditional hole-making methods often result in issues such as delamination and tearing during the processing of carbon ceramics. Helical grinding has emerged as a novel processing technology that shows promise for difficult materials like carbon ceramics. To address the lack of clarity regarding the removal mechanism and formation mechanism of material damage during helical grinding of carbon ceramic materials. Firstly, this study models the trajectory and maximum undeformed chip thickness for single abrasive. Subsequently, analyzes the influence of fiber anisotropy on the removal mechanism during helical grinding of carbon ceramics. The study also investigates the mechanisms behind exit damage occurring during carbon ceramic helical grinding processes. Finally, examines helical grinding technological parameters affect surface quality by analyzing their impact on undeformed chip thickness. The results indicate that matrix occurs brittle fracture during helical grinding. Four typical removal mechanism emerge for different fiber angles: debonding is predominant at 0°; fiber fracture occurs at 45°; fiber shear occurred at 90°; fiber pull out occurred at 135°. Hole exit damage is influenced by fiber direction with minimal damage observed when shear fracture occurs at angles 45° and 90° while burrs phenomenon and tear phenomenon are prevalent at angles 0°and 135° respectively. By increasing orbital rotation speed and spindle speed or decreasing feed pitch, surface quality improved. Grinding parameters significantly affect surface quality through changing undeformed chip thickness and surface residual height.

show abstract

Influence of grit geometry and fibre orientation on the abrasive material removal mechanisms of SiC/SiC Ceramic Matrix Composites (CMCs)

Cited by 65 publications

References 28 publications

The effects of grit properties and dressing on grinding mechanics and wheel performance: Analytical assessment framework

The effects of grit properties and dressing on grinding mechanics and wheel performance: Analytical assessment framework

Wear of Abrasive Tools during CMC Machining

Study on removal mechanism and surface quality in helical grinding 2.5D-Cf/SiC composites

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