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- Title
Experimental Analysis of NiTi Alloy during Strain-Controlled Low-Cycle Fatigue.
- Authors
Lima, Pedro Cunha; Rodrigues, Patrícia Freitas; Ramos, Ana Sofia; da Costa, José D. M.; Braz Fernandes, Francisco Manuel; Vieira, Maria Teresa
- 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.
- Subjects
SHAPE memory alloys; ALLOY analysis; MARTENSITIC transformations; TRANSMISSION electron microscopy; ELECTRICAL resistivity
- Publication
Materials (1996-1944), 2021, Vol 14, Issue 16, p4455
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma14164455