The internal friction, the Young’s modulus and the heat flow have been measured as a function of temperature in the Ni47Ti40Hf10Cu3 alloy. H-doping introduces two anelastic relaxations PH and PH’. PH is a Snoek-type effect (WH = 0.60 ± 0.1 eV, T0H = 2x10-(16±1) s) also occurring in NiTi(Cu) alloys. PH’ is a new phenomenon due to quantum-mechanical transitions of H bound to Hf atoms and located at tetrahedral interstitial sites.
Damping spectrum of H-free and H-doped shape memory alloys NiTiHfCu at kHz frequencies
COLUZZI, Bruno;BISCARINI, Andrea;MAZZOLAI, Fabio Massimo;
2004
Abstract
The internal friction, the Young’s modulus and the heat flow have been measured as a function of temperature in the Ni47Ti40Hf10Cu3 alloy. H-doping introduces two anelastic relaxations PH and PH’. PH is a Snoek-type effect (WH = 0.60 ± 0.1 eV, T0H = 2x10-(16±1) s) also occurring in NiTi(Cu) alloys. PH’ is a new phenomenon due to quantum-mechanical transitions of H bound to Hf atoms and located at tetrahedral interstitial sites.File in questo prodotto:
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