Microstructure and mechanical behaviour of in situ fabricated AA6061–TiC metal matrix composites

• Autorzy: Kumar G. S. P. , Koppad P. G. , Keshavamurthy R. , Alipour M.

Identyfikatory

DOI

10.1016/j.acme.2016.12.006

• Języki publikacji: EN

Abstrakty

EN

AA6061–TiC composites were developed by in situ reaction of molten AA6061 alloy with potassium hexafluorotitanate salt and pure graphite at a temperature of 900 °C. The in situ composites were subjected to hot forging at 500 °C and uniform strain rate of 0.0115 mm s−1 with degree of deformation of 65%. Both cast and forged in situ composites were subjected to grain size analysis and scanning electron microscopy studies to study the dispersion of TiC particles. Mechanical properties like Brinell hardness and tensile properties were evaluated to measure the effect of TiC particles on the AA6061 matrix. Microstructure of forged composites revealed uniform dispersion of TiC particles without forming any lumps at any particular regions. Brinell hardness and tensile strength of cast and forged in situ composites increased with increasing TiC particle content. The improved mechanical properties were attributed to good dispersion of TiC particles, grain refinement of the matrix and dislocation strengthening. Every fracture developed in cast ones was due to inter-dendritic cracking while in the case of forged ones it had mixed mode of fracture with dominating ductile nature.

Słowa kluczowe

EN

TiC particles; in situ composites; microstructure; mechanical properties

PL

właściwości mechaniczne; mikrostruktura; kompozyty

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2017
• Tom: Vol. 17, no. 3
• Strony: 535--544
• Opis fizyczny: Bibliogr. 28 poz., rys., tab., wykr.

Twórcy

autor

Kumar G. S. P.

• Department of Automobile Engineering, Dayananda Sagar College of Engineering, Bangalore 560078, India

autor

Koppad P. G.

• Department of Automobile Engineering, Dayananda Sagar College of Engineering, Bangalore 560078, India

autor

Keshavamurthy R.

• Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore 560078, India

autor

Alipour M.

• Faculty of Materials Science and Engineering, Khaje Nasir Toosi University of Technology, Tehran, Iran
• Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)