Mechanical Properties of Spray-Atomized FeAl40 at.%Al Alloys

Abstract

Three different as-atomized alloys Fe-40 at.%Al, Fe-40Al + 0.1 at.%B, and Fe-40Al + 0.1 at.%B + 10 at.%Al₂O₃ were deformed by compression under strain rates from 10⁻⁴ to 10⁻² s⁻¹, in order to study room-temperature mechanical properties. In the interval of 10⁻⁴ to 10⁻³ s⁻¹ strain rates all three alloys diminished their yield stress but in the interval of 10⁻³ to 10⁻² s⁻¹, the FeAl40 at.% base alloy and the alloy doped with boron raise their yield stress. On the other hand, contrary to the last two alloys the FeAl40 at.% alloy doped with boron and reinforcement with alumina particulate shows a decrease in the yield stress in the interval of the 10⁻³ to 10⁻² s⁻¹. The yield stress is discussed in terms of the effect of the boron and alumina particles, and the fracture morphology behavior. The main objective of this research is to present a comparative analysis of the three intermetallic materials, evaluating their structure and mechanochemical properties.