Abstract
This research study investigated the Nb content effect while using high-entropy elements in iron-based alloy Fe-1.5Ti-1.5Cr-1.5Al-1.5Si-XNb for automotive applications. The targeted alloy was sintered at 1100 degrees C while producing a single-phase alloy. The samples were designed by the CALPHAD approach and synthesized by a high-frequency heat injunction sintering system. A pseudo-binary phase diagram shows that the Nb wt. % content increases the phase field stability of alpha-Fe. Samples were characterized by hardness and corrosion to investigate their mechanical and chemical properties, respectively. The samples were observed by microstructure investigation with a junction with X-ray diffraction, and the iron-based alloy containing 1.5 wt. % Nb was found to be the best alloy. The sample was highly densified and had a porosity-free microstructure. In addition, the microstructure where two types of grains were present was unique. A single phase was successfully made and no intermetallic formed. There the corrosion resistance and hardness were the highest. Comparisons were all established based on Nb wt. % content in the equi range of 0, 1.0, 1.5, and 2.0.
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