Počet záznamů: 1
Elasticity and Damping Characteristics of SMA Single Crystals, Polycrystals and Thin Films
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SYSNO ASEP 0387976 Druh ASEP A - Abstrakt Zařazení RIV Záznam nebyl označen do RIV Zařazení RIV Není vybrán druh dokumentu Název Elasticity and Damping Characteristics of SMA Single Crystals, Polycrystals and Thin Films Tvůrce(i) Landa, Michal (UT-L) RID
Seiner, Hanuš (UT-L) RID, ORCID
Sedlák, Petr (UT-L) RID, ORCID
Bodnárová, Lucie (UT-L) RID, ORCIDZdroj.dok. 4th International Conference Smart, Material, Structures, Systems . - Faenza : Techna Group, 2012
S. 72-72Poč.str. 1 s. Akce CIMTEC 2012 /4./ Datum konání 10.06.2012-14.06.2012 Místo konání Tuscany Země IT - Itálie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. IT - Itálie Klíč. slova elasticity ; damping characteristics ; ferroelastics Vědní obor RIV BJ - Termodynamika Vědní obor RIV – spolupráce Fyzikální ústav CEP GA101/09/0702 GA ČR - Grantová agentura ČR CEZ AV0Z20760514 - UT-L (2005-2011) Anotace We discuss the applicability ultrasonic methods for precise determination of elasticity and damping characteristics of ferroelastics in the form of single crystals, polycrystalline materials and thin films. Particular behaviors of SMAs as are strong elastic anisotropy of single crystals, anomalous temperature dependence of elastic coefficients, their change with magnetic field (ferromagnetic SMAs) natural tendency of martensitic (low-symmetry) phase to form twinned structures as well as texture and fine grains structure of polycrystalline materials induced by technological processing are taken into account to the analysis of mechanical properties of SMAs. It is shown that by using a modal resonant ultrasound spectroscopy (RUS), the fully anisotropic elastic tensor (21 independent coefficients) of textured and micro-structured polycrystals can be determined, from which the symmetry class can be estimated with a search method of mirrors in the elastic tensor. The close correlation between the elastic anisotropy and the spatial arrangement of the grain boundaries in the examined materials is evident. The modified RUS and surface wave propagation (SAW) methods are developed for evaluation of elasticity of thin surface layers. The pros and cons of both approaches are summarized. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2013
Počet záznamů: 1