Actas de congresos
Anelastic relaxation due to interstitial solutes diffusion in Nb and Nb-1 wt% Zr
Fecha
2006-12-01Registro en:
Defect and Diffusion Forum, v. 258-260, p. 137-145.
1012-0386
10.4028/www.scientific.net/DDF.258-260.137
2-s2.0-33847279773
2949983867418338
1713208286133403
0000-0002-3336-309X
0000-0002-7801-8505
Autor
Universidade Federal de São Carlos (UFSCar)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.