We report on unprecedented transformation strains exceeding 20% in tension for Ni50.5Ti36.2Hf13.3 shape memory alloy (SMA). The strain measurements were made at multiscales utilizing advanced digital image correlation. The display of excellent strain reversibility in shape memory (isothermal deformation between Mf and Af), isobaric thermal cycling (between Mf and Af), and superelasticity experiments (deformation above Af) confirms a wide range of functionality. The ultrahigh strains in [111] orientation exceed the lattice deformation theory predictions possibly pointing to contributions from mechanical twinning effects. The high strength levels and large strains result in very high work outputs compared to other SMAs.
Ultrahigh tensile transformation strains in new Ni50.5Ti36.2Hf13.3 shape memory alloy
PATRIARCA, LUCA;
2016-01-01
Abstract
We report on unprecedented transformation strains exceeding 20% in tension for Ni50.5Ti36.2Hf13.3 shape memory alloy (SMA). The strain measurements were made at multiscales utilizing advanced digital image correlation. The display of excellent strain reversibility in shape memory (isothermal deformation between Mf and Af), isobaric thermal cycling (between Mf and Af), and superelasticity experiments (deformation above Af) confirms a wide range of functionality. The ultrahigh strains in [111] orientation exceed the lattice deformation theory predictions possibly pointing to contributions from mechanical twinning effects. The high strength levels and large strains result in very high work outputs compared to other SMAs.File | Dimensione | Formato | |
---|---|---|---|
2016 Wu _ Ultrahigh tensile transformation strains in new NiTiHf SMA.pdf
Accesso riservato
Descrizione: Articolo principale
:
Publisher’s version
Dimensione
582.23 kB
Formato
Adobe PDF
|
582.23 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.