The internal friction, the Young’s modulus, and the heat flow have been measured as a function of temperature (20–360 K) at kilohertz frequencies in a H-free and H-doped Ni50.8Ti49.2 alloy, solubilized under vacuum and rapidly furnace cooled. The chemical H-diffusion coefficient DC has been deduced from absorption experiments (323–1063 K) and has been compared with the Einstein diffusion coefficient DE derived from a Snoek (or Zener)-type relaxation PH. The comparison has allowed the interpretation of the so-called 200 K relaxation as a Snoek (or Zener)-type relaxation due to hydrogen.
Hydrogen diffusion and interpretation of the 200 K anelastic relaxation in NiTi alloys
MAZZOLAI, Fabio Massimo;COLUZZI, Bruno;BISCARINI, Andrea
2004
Abstract
The internal friction, the Young’s modulus, and the heat flow have been measured as a function of temperature (20–360 K) at kilohertz frequencies in a H-free and H-doped Ni50.8Ti49.2 alloy, solubilized under vacuum and rapidly furnace cooled. The chemical H-diffusion coefficient DC has been deduced from absorption experiments (323–1063 K) and has been compared with the Einstein diffusion coefficient DE derived from a Snoek (or Zener)-type relaxation PH. The comparison has allowed the interpretation of the so-called 200 K relaxation as a Snoek (or Zener)-type relaxation due to hydrogen.File in questo prodotto:
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