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Elsevier, Scripta Materialia, 3(51), p. 199-202

DOI: 10.1016/s1359-6462(04)00244-1

Elsevier, Scripta Materialia, 3(51), p. 199-202

DOI: 10.1016/j.scriptamat.2004.04.021

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Damping spectrum of H-free and H-doped shape memory alloys NiTiHfCu at kHz frequencies

Journal article published in 2004 by G. Mazzolai, F. M. Mazzolai, A. Tuissi ORCID, A. Biscarini, B. Coluzzi
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This paper is available in a repository.

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Abstract

The internal friction, the Young's modulus and the heat flow have been measured as a function of temperature in the Ni47Ti 40Hf10Cu3 alloy. H-doping introduces two anelastic relaxations PH and PH′. PH is a Snoek-type effect (WH=0.60±0.1 eV, τ0H= 2×10-(16±1) s) also occurring in NiTi(Cu) alloys. P H′ is a new phenomenon due to quantum-mechanical transitions of H bound to Hf atoms and located at tetrahedral interstitial sites. © 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.