Lima, Pedro CunhaRodrigues, Patrícia FreitasRamos, Ana Sofiada Costa, José D. M.Braz Fernandes, Francisco ManuelVieira, Maria Teresa Freire2021-10-012021-10-012021-08-091996-1944PURE: 33506515PURE UUID: b795bfd3-6903-4727-a6fc-3ccf267af44eScopus: 85112459006PubMed: 34442977PubMedCentral: PMC8398630WOS: 000690543900001ORCID: /0000-0003-3185-0019/work/100825954http://hdl.handle.net/10362/125424UIDB/EMS/00285/2020The interaction between the stress-induced martensitic transformation and resistivity behavior of superelastic NiTi shape memory alloy (SMA) was studied. Strain-controlled low-cycle fatigue up to 6% was monitored by in situ electrical resistivity measurements. The experimental results show that a great motion of martensite fronts results in a significant accumulation of defects, as evidenced by transmission electron microscopy (TEM), before and after the tensile cycles. This gives rise to an overall increase of the resistivity values up to the maximum deformation. Therefore, the research suggests that shape memory alloy wire has great potential as a stress sensor inside bulk materials.4173454engNiTiResistivityShape memory alloyStress-induced martensiteGeneral Materials ScienceCondensed Matter Physicsjournal article10.3390/ma14164455https://www.scopus.com/pages/publications/85112459006