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Journal of Materials Science

, Volume 43, Issue 5, pp 1593–1598 | Cite as

Effect of heavy interstitials on anelastic properties of Nb-1.0 wt% Zr alloys

  • Armando Cirilo de Souza
  • Carlos Roberto GrandiniEmail author
  • Odila Florêncio
Article

Abstract

The mechanical properties of metals with bcc structure, such as niobium and its alloys, have changed significantly with the introduction of heavy interstitial elements. These interstitial elements (nitrogen, for example), present in the alloy, occupy octahedral sites and constitute an elastic dipole of tetragonal symmetry and might produce anelastic relaxation. This article presents the effect of nitrogen on the anelastic properties of Nb-1.0 wt% Zr alloys, measured by means of mechanical spectroscopy using a torsion pendulum. The results showed complex anelastic relaxation structures, which were resolved into their constituent peaks, representing each relaxation process. These processes are due to stress-induced ordering of the interstitial elements around the niobium and zirconium of the alloy.

Keywords

Internal Friction Activation Enthalpy Relaxation Peak Metallic Matrix Torsion Pendulum 

Notes

Acknowledegements

The authors wish to thank Prof. Dr. Durval Rodrigues Júnior (USP-EEL) for the samples, the Universidade Estadual de Mato Grosso do Sul (UEMS) and the Brazilian CNPq and FAPESP agencies for their financial support.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Armando Cirilo de Souza
    • 1
    • 2
  • Carlos Roberto Grandini
    • 1
    Email author
  • Odila Florêncio
    • 3
  1. 1.UNESP, Grupo de Relaxações AnelásticasBauruBrazil
  2. 2.UEMSDouradosBrazil
  3. 3.Departamento de FísicaUFSCarSão CarlosBrazil

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