Resonance ultrasound spectroscopy is a measurement technique that uses the absorption ofsound waves at the natural resonance frequencies of a material to determine its elasticproperties. In this work, the elastic properties of Fe-x at.-% Ga and Fe-(20-y) at.-% Ga-y at.-%Al polycrystalline alloys were evaluated. The samples used had parallelepiped shape. Theabsorption spectra of FeGa and FeGaAl alloys obtained using a Dynamic Resonance Modulussystem over a specific frequency range were analyzed assuming the material to be isotropic.The elastic constant values, c11 and c44, were obtained from which Young's modulus and shearmodulus values were determined. The Young's modulus obtained from FeGa and FeGaAlalloys were in the range of 110 to 170 Gpa and are much greater than those obtained fromTerfenol-D alloys. The paper examines the trend in elastic property variation with changes inGa and Al content.
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