Impact strength of squeeze casting AlSi13Cu2–CF composite

• Autorzy: Zyska A. , Konopka Z. , Łągiewka M.

Identyfikatory

DOI

10.24425/afe.2020.131301

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of research on microstructure and impact strength of AlSi13Cu2 matrix composite reinforced by Ni-coating carbon fibers (CF) with a volume fraction of 5%, 10% and 15%. The composite suspensions were prepared using by stirring method and subsequently squeeze casted under different pressures of 25, 50, 75 and 100 MPa. As part of the study, fiber distribution in aluminum matrix was evaluated and variation in impact strength of composite as a function of the carbon fibers volume fraction and pressure applied were determined. It has been found that the presence of Ni coating on carbon fibers clearly improves their wettability by liquid aluminum alloy and in combination with the stirring parameters applied, composite material with relatively homogeneous structure can be produced. Charpy's test showed that the impact strength of composite reaches the highest value by carrying out the squeeze casting process at 75 MPa. In the next stage of research, it was found that the impact strength of composites increases with the increase of carbon fibers volume fraction and for 15% of fibers is close to 8 J/cm2. Observations of fracture surfaces have revealed that crack growth in the composites propagates with a quasi-cleavage mechanism. During the creation of the fracture, all fibers arranged perpendicular to its surface were sheared. At the same time, the metal matrix around the fibers deformed plastically creating characteristic ductile breaks. The fracture surface formation through the fibers indicates a cohesive and strong connection of the reinforcement with the matrix. In addition to the phenomena mentioned, debonding the fiber-matrix interfaces and the formation of voids between components were observed on the fracture surface.

Słowa kluczowe

EN

casting composites; squeeze method; carbon fibers; impact strength; microstructure

PL

kompozyty; metoda wyciskania; włókna węglowe; siła uderzenia; mikrostruktura

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2020
• Tom: Vol. 20, iss. 2
• Strony: 49--52
• Opis fizyczny: Bibliogr. 17 poz., rys., wykr.

Twórcy

autor

Zyska A.

• Czestochowa University of Technology, Department of Metallurgy and Metal Technology, Częstochowa, Poland

autor

Konopka Z.

• Czestochowa University of Technology, Department of Metallurgy and Metal Technology, Częstochowa, Poland

autor

Łągiewka M.

• Czestochowa University of Technology, Department of Metallurgy and Metal Technology, Częstochowa, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).