Structure / Property (Constitutive and Dynamic Strength / Damage) Characterization of Single-Phase FeAl

In this presentation, the results of a study quantifying the constitutive behavior of two different B2-structured FeAl intermetallics, as well as an FeAl-based metallic-intermetallic laminate (MIL) composite is presented. One textured and layered polycrystalline FeAl was fabricated using an innovative “multiple-thin-foil” configuration and “two-stage reaction” strategy. Layers of metallic Al and Fe foils were alternating stacked and then processed utilizing a combination of a multiple pressure & temperature processing procedure to produce fully-dense single-phase FeAl samples. This same approach was used to fabricate the MIL composite. An equiaxed, random polycrystalline single-phase FeAl sample was fabricated from powders to be used as a reference material. In this paper, the influence of the constitutive behavior as a function of loading orientation, temperature, and strain rate, from quasi-static to dynamic rates, is presented. The dynamic damage evolution and failure response of the three materials was probed using flyer-plate impact driven spallation experiments.