Microstructures and Hardness of Newly Designed Ti-6Al-(1-3)Fe Alloys

Abstract

Many Ti-alloys were designed by introducing iron (Fe) as an alloying element to improve the mechanical properties and reduce the cost of the alloys. Therefore, new (α+β) titanium alloys, Ti-6Al-(1-3)Fe were developed through complete replacement of vanadium (V) by iron with major composition modifications of Ti–6Al–4V, which is commonly used for aerospace applications. Ti-Al-Fe alloys were melted through vacuum arc melting technique followed by hot rolling. This study aims to investigate the effect of Fe addition on the microstructure and hardness of emerging (Ti-Al-Fe) alloys in comparison with Ti-6Al-4V alloy. Results reveal that the microstructures are typical lamellar structures, and the hardness ranges from 32 to 40.7 HRC. The hardness of the investigated alloys increases with increasing Fe content.