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Microstructure and mechanical behavior of FeNiMnAl eutectic alloys

Microstructure and mechanical behavior of FeNiMnAl eutectic alloys is being studied to understand the deformation mechanisms controlling the strength and ductility of a recently-discovered, high-strength, ductile, eutectic FeNiMnAl alloy, Fe₃₀Ni₂₀Mn₃₅Al₁₅, that consists of f.c.c. and B2 (ordered b.c.c.) phases and to model the yield strength and ductility either by using existing models or by developing new models. The work involves mechanical testing and microstructural characterization using a combination of state-of-the-art techniques including transmission electron microscopy (TEM) including convergent beam electron diffraction and energy dispersive x-ray spectroscopy; a high resolution TEM; and atom probe tomography. These will provide information on the lamellar spacing and morphology, microchemistry, lattice parameters, orientation relationships between the f.c.c. and B2 phases, interface strains and interface structure.

Faculty contact: Ian Baker