Florêncio, O.Silva, P. S.Grandini, Carlos Roberto [UNESP]2014-05-272014-05-272006-12-01Defect and Diffusion Forum, v. 258-260, p. 137-145.1012-0386http://hdl.handle.net/11449/69303Metals and alloys containing solute atoms dissolved interstitially often show anelastic behavior due to a process know as stress-induced ordering. The application of mechanical spectroscopy measurements to diffusion studies in body-centered cubic metals has been extensively used in the last decades. However the kind of preferential occupation of interstitial solutes in body-centered cubic metals is still controversial. The anelastic properties of the Nb and Nb-1 wt% Zr polycrystalline alloys were determined by internal friction and oscillation frequency measurements using a torsion pendulum inverted performed between 300K and 650K, operating in a frequency oscillation in the hertz bandwidth. The interstitial diffusion coefficients of oxygen and nitrogen in Nb and Nb-1 wt% Zr samples were determined at two distinct conditions: (a) for low concentration of oxygen and (b) for high concentration of oxygen.137-145engInternal frictionInterstitial diffusionNbNb-Zr alloysNitrogenOxygenAnelastic behaviorBody-centered cubic metalsStress-induced orderingBandwidthNiobium compoundsPhysical propertiesRelaxation processesSpectroscopic analysisDiffusion in solidsTrabalho apresentado em evento10.4028/www.scientific.net/DDF.258-260.137Acesso aberto2-s2.0-33847279773294998386741833817132082861334030000-0002-3336-309X0000-0002-7801-8505