Title
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Towards understanding anelasticity of the martensitic phase of Cu-Al-Ni
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Author
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Abstract
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The present work continues the series of experimental investigations undertaken in order to elucidate the mechanisms controlling elastic and anelastic properties of the beta(1)' martensitic phase of Cu-based shape memory alloys. The paper reports an attempt to distinguish between 'dislocation' and 'interface' mechanisms of the internal friction in the beta(1)' martensitic phase of Cu-Al-Ni single crystals. Two types of experiments have been performed. First, the ultrasonic strain amplitude-independent and amplitude-dependent internal friction (ADIF) of a monovariant specimen for temperatures 90-300 K is carefully re-examined. Second, in situ measurements of the ADIF and of the influence of ultrasonic oscillations on the plastic deformation (acoustoplastic effect) were carried out during quasistatic deformation of a quenched polyvariant specimen. Experimental results support a dislocation rather than an interface mechanism of anelasticity, at least at ultrasonic frequencies and moderate strain amplitudes. (C) 2000 Elsevier Science S.A. All rights reserved. |
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Language
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English
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Source (journal)
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Journal of alloys and compounds. - Amsterdam
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Source (book)
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12th International Conference on Internal Friction and Ultrasonic, Attenuation in Solids (ICIFUAS-12), JUL 19-23, 1999, BUENOS AIRES, ARGENTINA
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Publication
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Amsterdam
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2000
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ISSN
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0925-8388
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DOI
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10.1016/S0925-8388(00)01019-7
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Volume/pages
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310
(2000)
, p. 306-311
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ISI
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000089480800064
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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