Microstructural and Mechanical Properties of Binary Ti-Rich Fe–Ti, Al-Rich Fe–Al, and Ti–Al Alloys

Abstract

Three series of binary, FeTi (Ti-rich), FeAl and TiAl (Al-rich) alloy samples were produced in an argon arc furnace. An annealing treatment of 72 h at 1000 °C was applied to the samples, giving rise to different equilibrium microstructures depending on chemical composition. Their mechanical properties were studied through the determination of elastic constants that measure the stiffness of the elaborated materials. Young’s modulus of the binary alloys was determined using Resonance Ultrasonic Vibration (RUV). The accuracy of this technique was demonstrated. A scanning electron microscope (SEM) with an energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) made it possible to identify intermetallic compounds FeTi and Fe2Ti, FeAl and FeAl2, and TiAl and TiAl2 in respective systems Fe–Ti, Fe–Al, and Ti–Al. The link between their composition, microstructure, and elastic properties was established.

Comparison of thermal diffusion and interfacial reactions for bulk and sputtered titanium on 316L stainless steel

“…[30]). FeTi is known to be hard (measured elastic modulus up to 310 GPa [31]), abrasive resistant and brittle [32]. A large fraction of studies concerning this compound are linked to liquid processes involving titanium and iron alloys (soldering, laser deposition, etc.…”

Research progress of Fe/Al2O3 interface based on first principles

“…Fe-Al alloys not only have the advantages of low density and low cost, but also have excellent corrosion, oxidation and vulcanization resistance [1]. They could be used as innovative materials in the aerospace and automotive industries, as well as in energy conversion systems [2].…”

Different Connection Models of Icosahedral Structures in TiAl Alloy Caused by the Cooling Rates

“…It is considered a potential material in aerospace, chemical, and energy industries. [1][2][3] However, the low room temperature ductility and poor formability of TiAl-based alloys limit their widespread application. [4,5] The emergence of metallic glass (MG) provides a new approach to solve this problem.…”