dc.contributor.author | Ruiz Larrea, María Isabel | |
dc.contributor.author | López Echarri, Ángel María | |
dc.contributor.author | Gómez Cortés, José Fernando | |
dc.contributor.author | Nó Sánchez, María Luisa | |
dc.contributor.author | Brown, Donald W. | |
dc.contributor.author | Balogh, Levente | |
dc.contributor.author | Breczewski Filberek, Tomasz | |
dc.contributor.author | San Juan Núñez, José María ![ORCID](/themes/Mirage2//images/orcid_16x16.png) | |
dc.date.accessioned | 2019-05-20T09:13:09Z | |
dc.date.available | 2019-05-20T09:13:09Z | |
dc.date.issued | 2019-02-28 | |
dc.identifier.citation | Journal Of Applied Physics 125(8) : (2019) // Article ID 082536 | es_ES |
dc.identifier.issn | 0021-8979 | |
dc.identifier.issn | 1089-7550 | |
dc.identifier.uri | http://hdl.handle.net/10810/32864 | |
dc.description.abstract | In situ neutron diffraction is used to study the strain relaxation on a single crystal and other powdered Cu-Al-Ni shape memory alloys (SMAs) around martensitic transformation temperatures. This work is focused on the analysis of the strain evolution along the temperature memory effect appearing in these alloys after partial thermal transformations. A careful study of the influence of partial cycling on the neutron diffraction spectra in the martensitic phase is presented. Two different effects are observed, the d-spacing position shift and the narrowing of various diffraction peaks, along uncompleted transformation cycles during the thermal reverse martensitic transformation. These changes are associated with the relaxation of the mechanical stresses elastically stored around the martensitic variants, due to the different self-accommodating conditions after uncompleted transformations. The evolution of the stresses is measured through the strain relaxation, which is accessible by neutron diffraction. The observed effects and the measured strain relaxations are in agreement with the predictions of the model proposed to explain this behavior in previous calorimetric studies. In addition, the thermal expansion coefficients of both martensite and austenite phases were measured. The neutron experiments have allowed a complete description of the strains during martensitic transformation, and the obtained conclusions can be extrapolated to other SMA systems. (c) 2019 Author(s). | es_ES |
dc.description.sponsorship | This work was supported by the Spanish Ministry of Economy and Competitiveness (No. MINECO MAT2017-84069-P), as well as by the Consolidated Research Group (No. IT-1090-16) and the ELKARTEK-ACTIMAT project from the Education and Industry Departments of the Basque Government. The University of the Basque Country (UPV/EHU) also supported this work with the Research Group GIU17/071. This work has benefited from the use of NPDF at the Lujan Center at Los Alamos Neutron Science Center, funded by the Department of Energy (DOE) Office of Basic Energy Sciences. Los Alamos National Laboratory is operated by Los Alamos National Security LLC, under DOE Contract No. DE-AC52-06NA25396. The upgrade of NPDF was funded by the National Science Foundation (NSF) through Grant No. DMR 00-76488. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | American Institute of Physics | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/MAT2017-84069-P | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.subject | martensitic-transformation | es_ES |
dc.subject | incomplete transformation | es_ES |
dc.subject | elastic-constants | es_ES |
dc.subject | beta-phase | es_ES |
dc.subject | temperature | es_ES |
dc.subject | superelasticity | es_ES |
dc.subject | scattering | es_ES |
dc.subject | austenite | es_ES |
dc.subject | stress | es_ES |
dc.title | Strain Relaxation in Cu-Al-Ni Shape Memory Alloys Studied by in Situ Neutron Diffraction Experiments | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/) | es_ES |
dc.rights.holder | Atribución 3.0 España | * |
dc.relation.publisherversion | https://aip.scitation.org/doi/10.1063/1.5049216 | es_ES |
dc.identifier.doi | 10.1063/1.5049216 | |
dc.departamentoes | Física aplicada II | es_ES |
dc.departamentoes | Física de la materia condensada | es_ES |
dc.departamentoeu | Fisika aplikatua II | es_ES |
dc.departamentoeu | Materia kondentsatuaren fisika | es_ES |