Anelastic relaxation due to interstitial solutes diffusion in Nb and Nb-1 wt% Zr
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Data
2006-12-01
Autores
Florêncio, O.
Silva, P. S.
Grandini, Carlos Roberto [UNESP]
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Resumo
Metals 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.
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Internal friction, Interstitial diffusion, Nb, Nb-Zr alloys, Nitrogen, Oxygen, Anelastic behavior, Body-centered cubic metals, Stress-induced ordering, Bandwidth, Niobium compounds, Physical properties, Relaxation processes, Spectroscopic analysis, Diffusion in solids
Como citar
Defect and Diffusion Forum, v. 258-260, p. 137-145.