Specific forward/reverse latent heat and martensite fraction measurement during superelastic deformation of nanostructured NiTi wires

Autor: Denis Favier, Henrique Martinni Ramos de Oliveira, Estephanie Nobre Dantas Grassi, Hervé Louche
Přispěvatelé: Ingénierie Biomédicale et Mécanique des Matériaux (TIMC-IMAG-BioMMat), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), ThermoMécanique des Matériaux (ThM2), Laboratoire de Mécanique et Génie Civil (LMGC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)
Rok vydání: 2020
Předmět:
Materials science
heat balance
[SPI.MECA.MSMECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph]
02 engineering and technology
01 natural sciences
7. Clean energy
[SPI.MAT]Engineering Sciences [physics]/Materials
Stress (mechanics)
Differential scanning calorimetry
Latent heat
enthalpy of transformation
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
0103 physical sciences
Ultimate tensile strength
General Materials Science
Composite material
superelastic NiTi
010302 applied physics
business.industry
Mechanical Engineering
nanostructured NiTi wires
kinematic and thermal full field measurements
021001 nanoscience & nanotechnology
Condensed Matter Physics
Mechanics of Materials
Nickel titanium
Martensite
[SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph]
Deformation (engineering)
0210 nano-technology
business
Thermal energy
Zdroj: Materials Science and Engineering: A
Materials Science and Engineering: A, Elsevier, 2020, 774, pp.138928. ⟨10.1016/j.msea.2020.138928⟩
ISSN: 0921-5093
DOI: 10.1016/j.msea.2020.138928
Popis: International audience; This study analyses the thermomechanical tensile behaviour of a cold drawn Ti-50.9at.%Ni wire submitted to heat treatment at 598 K for 30 min, which is below the recrystallization temperature (623 K). Such low temperature heat treatment induces a superelastic loop without a stress "plateau". However, the absence or weakness of peaks on its differential scanning calorimetry prevents the determination of specific latent heat. This is a common effect of nanostructured materials such as superelastic wires. A method using strain and temperature field measurements was developed and used to determine thermal power and thermal energy during superelastic tensile tests through a heat balance. From these results and using a thermodynamic approach, forward and reverse specific latent heat and the martensite fraction are estimated as a function of strain and stress.
Databáze: OpenAIRE
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