Microstructure, wear, and corrosion characterization of high TiC content Inconel 625 matrix composites

Ashraf Bakkar; Mohamed M.Z. Ahmed; Naser A. Alsaleh; Mohamed M. El-Sayed Seleman; Sabbah Ataya

Journal of Materials Research and Technology (Jan 2019)

Microstructure, wear, and corrosion characterization of high TiC content Inconel 625 matrix composites

Ashraf Bakkar,
Mohamed M.Z. Ahmed,
Naser A. Alsaleh,
Mohamed M. El-Sayed Seleman,
Sabbah Ataya

Affiliations

Ashraf Bakkar: Metallurgical and Materials Engineering Department, Faculty of Petroleum and Mining Engineering, Suez University, 43721 Suez, Egypt; Department of Environmental Engineering, College of Engineering at Al-Lith, Umm Al-Qura University, Corniche Road, Al-Lith City, Saudi Arabia
Mohamed M.Z. Ahmed: Metallurgical and Materials Engineering Department, Faculty of Petroleum and Mining Engineering, Suez University, 43721 Suez, Egypt; The British University in Egypt, Mechanical Engineering Department, El-Sherouk City, 11837 Cairo, Egypt
Naser A. Alsaleh: College of Engineering, Al Imam Mohammad Ibn Saud Islamic University, 11432 Riyadh, Saudi Arabia
Mohamed M. El-Sayed Seleman: Metallurgical and Materials Engineering Department, Faculty of Petroleum and Mining Engineering, Suez University, 43721 Suez, Egypt; Suez and Sinai Metallurgical and Materials Research Center of Scientific Excellence (SSMMR-CSE), Suez University, 43721 Suez, Egypt
Sabbah Ataya: Metallurgical and Materials Engineering Department, Faculty of Petroleum and Mining Engineering, Suez University, 43721 Suez, Egypt; College of Engineering, Al Imam Mohammad Ibn Saud Islamic University, 11432 Riyadh, Saudi Arabia; Suez and Sinai Metallurgical and Materials Research Center of Scientific Excellence (SSMMR-CSE), Suez University, 43721 Suez, Egypt; Corresponding author.

Journal volume & issue: Vol. 8, no. 1
pp. 1102 – 1110

Abstract

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Titanium carbide/Inconel 625 (nickel alloy) metal matrix composites (MMCs) are developed for the combination of the super mechanical and corrosion properties of nickel alloy matrix and the high hardness of reinforcing titanium carbide particles (TiCp). The microstructure, hardness, wear, and corrosion behavior of MMCs with different volume contents of TiCp (25, 50 and 70 vol.%) were investigated. The effect of increasing TiCp on the intermetallics and precipitates formed was examined using SEM/EDS and XRD analyses. The tribological behavior of the MMCs was investigated using wear testing with a pin-on-disk machine. The corrosion behavior was examined using potentiodynamic polarization experiments in 3% (w/v) NaCl solution. The results showed that the addition of TiCp into the Inconel 625 alloy resulted in formation of several intermetallics such as MoNi4, Cr2Ni3 and MoCr, in addition to molybdenum and chromium carbides in the matrix alloy. A great improvement in the hardness was resulted with addition of 25 vol.% TiCp and consequently the wear resistance was also improved. Further increase of TiCp from 50 to 70 vol.% did not result in more improvement of both hardness and wear resistance. The corrosion resistance of TiCp (25 vol.%) composite was comparable to that of monolithic Inconel 625 matrix alloy, while clear reduction in the corrosion resistance was found in the 50 and 70 vol.% composites. Keywords: Inconel 625, TiCp MMC, Microstructure, Hardness, Wear, Corrosion

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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