Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/105210
Title: Experimental Analysis of NiTi Alloy during Strain-Controlled Low-Cycle Fatigue
Authors: Lima, Pedro Cunha 
Rodrigues, Patrícia Freitas 
Ramos, Ana Sofia 
Costa, José D. M. da 
Braz Fernandes, Francisco Manuel 
Vieira, Maria Teresa 
Keywords: NiTi; shape memory alloy; stress-induced martensite; resistivity
Issue Date: 9-Aug-2021
Publisher: MDPI AG
Project: PTDC/CTM-CTM/29101/2017— POCI-01-0145-FEDER-029101 
UIDB/EMS/00285/2020 
UIDB/50025/2020-2023 
Serial title, monograph or event: Materials
Volume: 14
Issue: 16
Abstract: The 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.
URI: https://hdl.handle.net/10316/105210
ISSN: 1996-1944
DOI: 10.3390/ma14164455
Rights: openAccess
Appears in Collections:I&D CEMMPRE - Artigos em Revistas Internacionais

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