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Pre-stressed NiTi: effects of the thermodynamic forces and time
dc.contributor.author | Torra Ferré, Vicenç |
dc.contributor.author | Isalgué Buxeda, Antonio |
dc.contributor.author | Auguet Sangrá, Carlota E. |
dc.contributor.author | Lovey, Francisco Carlos |
dc.contributor.author | Pelegrina, J.L. |
dc.contributor.author | Terriault, P. |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física Aplicada |
dc.date.accessioned | 2010-05-28T18:48:15Z |
dc.date.available | 2010-05-28T18:48:15Z |
dc.date.created | 2008-11-30 |
dc.date.issued | 2008-11-30 |
dc.identifier.citation | Torra, V. [et al.]. Pre-stressed NiTi: effects of the thermodynamic forces and time. A: "Proceedings of The International Conference on Shape Memory and Superelastic Technologies (SMST-2007)". 2008, p. 55-62. |
dc.identifier.uri | http://hdl.handle.net/2117/7428 |
dc.description.abstract | The use of NiTi in damping devices for Civil Engineering requires stable behavior of the stress-strain curves with time and cycling. In particular, the use of pre-stressed samples improves the damping efficiency. Since earthquakes can appear after several years (or decades) of calmness, it is required that the alloy maintains their properties unchanged even after long time in the pre-stressed situation. The static experimental analysis in parent phase, in phase coexistence and in martensite shows minor changes after one month at the pre-stressed condition. These changes increase when the room temperature is increased from 293 to 303 K. The study of aging at 373 K by calorimetric measurements shows relevant changes of both the R-phase and the martensitic transformation temperatures, with time constants near 70 days, in agreement with X-ray diffraction analysis. Preliminary observations associated to dynamic actions (cycling and pauses) shows that the accumulated deformation partially recovers in the pauses. |
dc.format.extent | 8 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Física::Física de l'estat sòlid |
dc.subject.lcsh | Damping (Mechanics) |
dc.title | Pre-stressed NiTi: effects of the thermodynamic forces and time |
dc.type | Conference lecture |
dc.subject.lemac | Resistència estructural |
dc.identifier.doi | 10.1361/cp2007/smst055 |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 2514270 |
dc.description.version | Postprint (published version) |
local.citation.author | Torra, V.; Isalgue, A.; Auguet, C.; CARLOS LOVEY, F.; Pelegrina, J.; Terriault, P. |
local.citation.publicationName | Proceedings of The International Conference on Shape Memory and Superelastic Technologies (SMST-2007) |
local.citation.startingPage | 55 |
local.citation.endingPage | 62 |