Bending Strength of Composite Materials with EN AC-44200 Matrix Reinforced with Al₂O₃ Particles

• Autorzy: Kurzawa J. , Kaczmar J. W.
• Języki publikacji: EN

Abstrakty

EN

There are presented results of a research on bending strength of aluminum alloy EN AC-44200 based composite materials reinforced with aluminum oxide particles. The composite materials were manufactured by squeeze casting with the liquid EN AC-44200 Al alloy of porous ceramic preforms under pressure of 100 MPa. For reinforcing of the EN AC-44200 matrix alloy, preforms made of Al₂O₃ particles with porosity 60, 70, 80 and 90% were applied. In relation to unreinforced EN AC-44200 base Al alloy, bending strength of composite materials increased about 10% per each 10 vol.% increase of Al₂O₃ particles in the matrix. The highest bending strength of over 400 MPa was reached by the materials reinforced with 30 and 40 vol.% of Al₂O₃ particles. Microscopic observations of fracture surfaces confirm that the particles intensively restrict plastic deformation of the alloy, which contributes to creation of a typically brittle fracture. The particles present on the crack propagation path inhibit development of microcracks initiated during bend tests. Most often, the fracture runs through interfacial matrix-particle boundaries, which is caused by brittle bridges of silica binder, present on these boundaries.

Słowa kluczowe

EN

composite materials; aluminium oxide particles; bending strength

PL

materiały kompozytowe; tlenek glinu; wytrzymałość na zginanie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 15, iss. 1 spec.
• Strony: 61--64
• Opis fizyczny: Bibliogr. 11, poz., rys., tab., wykr.

Twórcy

autor

Kurzawa J.

• Department of Foundry Engineering, Polymers and Automation, Wrocław University of Technology, Faculty of Mechanical Engineering, Smoluchowskiego 25, 50-372 Wrocław, Poland

autor

Kaczmar J. W.

• Department of Foundry Engineering, Polymers and Automation, Wrocław University of Technology, Faculty of Mechanical Engineering, Smoluchowskiego 25, 50-372 Wrocław, Poland

Bibliografia

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• [3] Hossein-Zadeh, M., Mirzaee, O. & Saidi, P. (2014). Structural and mechanical characterization of Al-based composite reinforced with heat treated Al2O3 particles, Materials and Design 54. 245–250.
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• [7] Kaczmar, J.W. & Kurzawa. A. (2012). The effect of α- alumina particles on the properties of EN AC-44200 Al alloy based composite materials, Journal of Achievements in Materials and Manufacturing Engineering 55, 1. 39-44.
• [8] Kaczmar J.W. (2013). Production, properties and applications of the elements of composite materials. Oficyna PWr, (in Polish).
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