The corrosion resistance and magnetostriction of (Tb0.3Dy0.7)Fe2 alloy were investigated for different nitrogen doses of 5×1015, 5×1016, 5×1017, 1×1018 ions/cm2 and average ion energy of 140 kV. The phase and elements concentration in the implanted layer were examined by X-ray diffraction and auger electron spectroscopy, respectively.The aqueous corrosion studies were carried out in 3.5% NaCl solutions. It was found that corrosion resistance had improved substantially with respect to the untreated substrates.The corrosion resistance was maximum at a dose of 5×1017 ions/cm2, and saturation in corrosion improvement was noticed at a higher dose, 10×1017 ions/cm2.In contrast, the results of magnetostriction tests before and after ion implantation showed that the influence of ni-trogen ion implantation on the magnetostrictive properties turned out to be small. Finally, a model was applied to interpret the influ-ence of nitrogen implantation on the magnetostriction in the light of the information provided by the experimental results in this study.
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