Machinability analysis of thin-walled carbon fiber reinforced ceramic composites based on wire electrical discharge machining

• Autorzy: Poroś, Dariusz , Wiśniewska, Magdalena
• Języki publikacji: EN

Abstrakty

EN

We propose employing wire electrical discharge machining (WEDM) for shaping thin-walled, multidirectional, carbon fiber reinforced silicon carbide (Cf-SiC) composite parts. Ceramic matrix composite Cf-SiC combines the outstanding mechanical properties of the carbon fiber with oxidation, abrasive wear, corrosion resistance, and high strength at the high temperature of the silicon carbide matrix. The impact of time-related electrical discharge machining parameters (pulse ON-time and break OFF-time) on the material removal rate and surface roughness are analyzed. The material removal rate of the Cf-SiC is proved to be 36% lower than that for machined steel grade 55. The high thermal stresses and interaction of the composite accompanying WEDM are also discussed. Furthermore, an alternative mechanism to the WEDM of metals has been investigated and confirmed by a scanning electron microscopy (SEM) analysis. The morphology of the machined Cf-SiC surface demonstrates the dominance of the carbon fibers’ fracture mechanism, both the transverse and longitudinal forms, with interphase detachment over craters and micro-cracks, pitting, and spalling on the SiC matrix. Satisfactory roughness indicators (Sa = 2 µm) are obtained in 3D topography measurements of the Cf-SiC surfaces. Concluding, the WEDM should be considered a good alternative to Cf-SiC abrasive machining when cutting holes, grooves, keyways, splines, and other complex shapes.

Słowa kluczowe

EN

wire electrical discharge machining; Cf-SiC; ceramic matrix composites; carbon fiber; SEM; surface roughness

• Czasopismo: Zeszyty Naukowe Politechniki Morskiej w Szczecinie
• Rocznik: 2024
• Tom: nr 77 (149)
• Strony: 5--13
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Poroś, Dariusz

• Wrocław University of Science and Technology, Faculty of Mechanical and Power Engineering 27 Wybrzeże Wyspiańskiego St., 50-370 Wrocław, Poland,

autor

Wiśniewska, Magdalena

• Wrocław University of Science and Technology, Faculty of Mechanical and Power Engineering 27 Wybrzeże Wyspiańskiego St., 50-370 Wrocław, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).

Identyfikatory

DOI

10.17402/591