Microhardness and Microstructure of In-Situ Formed Fe-50%TiC Composites by Different Heating Methods

Authors : Melih KOÇYİĞİT, Hasan Erdem ÇAMURLU

Pages : 421-428

Doi:10.54287/gujsa.1173307

View : 49 | Download : 9

Publication Date : 2022-12-31

Article Type : Research Paper

Abstract :The aim of this study is to fabricate in-situ TiC particle reinforced Fe matrix composites via volume combustion synthesis insert ignore into journalissuearticles values(VCS); through heating by two different sources. One group of reactant pellets was ignited by heating in an induction furnace insert ignore into journalissuearticles values(IF);. The other group was ignited via heating by using a tungsten inert gas insert ignore into journalissuearticles values(TIG); torch. Thus, the differences in the microhardness and microstructure of the obtained composites could be compared. Fe, C and Ti elemental powders were used to obtain composites that contained 50 vol. % TiC in the Fe matrix. In the repeated experiments, the ignition temperatures of the IF pellets were found to be in 1164-1184 oC range. The formation of composites was verified by X-ray diffraction insert ignore into journalissuearticles values(XRD); analyses, where it was seen that the products were composed of TiC and Fe with trace impurity phase. Scanning electron microscope insert ignore into journalissuearticles values(SEM); examinations showed that the in-situ formed TiC particles were regularly distributed in matrix in both series. The TiC particles obtained by TIG heating were about 5 times larger than the particles obtained by induction heating. Microhardness values of the samples were higher in IF series as compared to TIG series. It was shown that 50 vol. % TiC particle reinforced Fe matrix composites could be obtained by both heating methods. TIG was found to be a much practical method, when compared to conducting VCS in a furnace.
Keywords : Volume Combustion Synthesis, Fe TiC, MMCs, Microhardness, Microstructure

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