%0 Journal Article
%T Specific forward/reverse latent heat and martensite fraction measurement during superelastic deformation of nanostructured NiTi wires
%+ Ingénierie Biomédicale et Mécanique des Matériaux (TIMC-IMAG-BioMMat)
%+ ThermoMécanique des Matériaux (ThM2)
%A Ramos de Oliveira, Henrique, Martinni
%A Louche, Hervé
%A Grassi, Estephanie Nobre Dantas
%A Favier, Denis
%< avec comité de lecture
%@ 0921-5093
%J Materials Science and Engineering: A
%I Elsevier
%V 774
%P 138928
%8 2020-02
%D 2020
%R 10.1016/j.msea.2020.138928
%K superelastic NiTi
%K nanostructured NiTi wires
%K kinematic and thermal full field measurements
%K heat balance
%K enthalpy of transformation
%Z Engineering Sciences [physics]/Materials
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph]
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph]Journal articles
%X 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.
%G English
%2 https://hal.science/hal-02470296/document
%2 https://hal.science/hal-02470296/file/Art_Louche_al_Mat-Science-Eng_2020.pdf
%L hal-02470296
%U https://hal.science/hal-02470296
%~ UGA
%~ IMAG
%~ CNRS
%~ INPG
%~ LMGC
%~ TIMC-IMAG
%~ TIMC-IMAG-BIOMMAT
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UNIV-LYON
%~ UGA-EPE
%~ UM-2015-2021
%~ TEST3-HALCNRS