Diffusion and anelastic relaxation due to hydrogen in solid solution in Nb-Ti and Nb-Zr alloys. / Difusão e relaxação anelástica devido ao hidrogênio em solução sólida em ligas de Nb-Ti e Nb-Zr.

AUTOR(ES)
DATA DE PUBLICAÇÃO

1993

RESUMO

We study the effect of hydrogen dissolved interstitially in niobium-titanium and niobium-zirconium alloys. In the niobimn-titanium alloys, the logarithmic decrement was studied by internal friction measurements in a torsion pendulum with frequency about 4.0 Hz, on pure and hydrogen doped samples. Our results showed the interaction of hydrogen with the metallic matrix by the Gorsky effect. In the niobium-zirconium alloys, the ultrasonic attenuation was measured by the echo-pulse method with frequencies of 10 and 30 MHz, for pure, doped with hydrogen and doped with oxygen and hydrogen. The results have shown the interaction of hydrogen with the metallic matrix by a stress induced ordering of hydrogen atoms localized at tetrahedral sites around frozen oxygen atoms localized in the octahedral sites near the niobium atoms in the metallic matrix.

ASSUNTO(S)

atrito interno difusão hydrogen nb alloys anelasticidade anelasticity ligas de nb hidrogênio diffusion internal friction

ACESSO AO ARTIGO

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