Rotary-bending fatigue characteristics of medical-grade Nitinol wire

Pelton, Alan R.; Fino-Decker, J.; Vien, Lot; Bonsignore, Craig; Saffari, Payman; Launey, Maximilien E.; Mitchell, M. R.

doi:10.1016/j.jmbbm.2013.06.003

Cited by 74 publications

(83 citation statements)

References 29 publications

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“…Several experimental studies have used rotating-bending tests to evaluate the fatigue behavior of Nitinol alloys (e.g., (Bertacchini et al, 2009;Miyazaki et al, 1999;Pelton et al, 2013)). In certain cases, the results from rotating-bending tests may be suitable for fatigue evaluation purposes (Duerig et al, 1999;ASTM E2948-14, 2014.…”

Section: Fatigue Testing Techniquesmentioning

confidence: 99%

“…Pelton and co-workers (Pelton et al, 2013) used the same concept by employing mandrels of different radii to bend the wires into smooth curves as shown in Figure 2(b). This method is a guided test setup where mandrels act as support guides.…”

Section: Figure 2-configurations For the Rotating-bending Fatigue Tesmentioning

confidence: 99%

“…It is worth mentioning that a few studies have suggested a fatigue limit in the long life regime for strain-life fatigue curves of Nitinol alloys (Eggeler et al, 2004;Pelton et al, 2013).…”

Section: Strain-life Fatigue Behaviormentioning

confidence: 99%

“…Pelton et al (Pelton et al, 2013) recently divided the strain-life fatigue data of superelastic Nitinol (i.e. the test temperature above A f ) to four distinct regimes in log-log plots; very lowcycle (N ≤ 10 3 cycles), low-cycle (N ~ 10 3 cycles), mid-cycle (10 3 ≤ N ≤ 10 5 cycles), and highcycle (N ≥ 10 5 cycles).…”

Section: Figure 7-effects Of Test Temperature On the Rotating-bendingmentioning

confidence: 99%

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Fatigue of Nitinol: The state-of-the-art and ongoing challenges

Mahtabi

Shamsaei

Mitchell³

2015

Journal of the Mechanical Behavior of Biomedical Materials

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173

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Section: Fatigue Testing Techniquesmentioning

confidence: 99%

Section: Figure 2-configurations For the Rotating-bending Fatigue Tesmentioning

confidence: 99%

“…It is worth mentioning that a few studies have suggested a fatigue limit in the long life regime for strain-life fatigue curves of Nitinol alloys (Eggeler et al, 2004;Pelton et al, 2013).…”

Section: Strain-life Fatigue Behaviormentioning

confidence: 99%

Section: Figure 7-effects Of Test Temperature On the Rotating-bendingmentioning

confidence: 99%

See 2 more Smart Citations

Fatigue of Nitinol: The state-of-the-art and ongoing challenges

Mahtabi

Shamsaei

Mitchell³

2015

Journal of the Mechanical Behavior of Biomedical Materials

Self Cite

173

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“…Since then, several fatigue studies have been carried out using different testing procedures. For medical devices, the Bending-rotation fatigue (BRF) testing is widely used [6][7] [8]. Fatigue of laser-cut struts, the building units of medical stents, are often tested in cyclic tension-compression [9] [10].…”

Section: Introductionmentioning

confidence: 99%

Phase Transformations and Fatigue of NiTi

Alarcon

Heller²,

Chirani³

et al. 2015

MATEC Web of Conferences

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Abstract. Tensile fatigue of superelastic medical graded NiTi wires was analysed in stress control regime with special attention paid to the deformation/transformation processes involved. Concave shaped samples were machined from NiTi wires allowing us to confine deformation processes into the centre of the sample. The localization of phase transformations within the centre was confirmed using in-situ infrared imaging. Characteristic stress-displacement responses for amplitudes inducing either R-phase only or both R-phase and martensite were identified for these samples. A limited number of pull-pull fatigue tests in force-control regime were performed. The obtained S-N curve and associated stress-displacement responses allowed for identification of three fatigue regimes differing in the fatigue life-time by orders of magnitude. Particularly, fatigue life-time deteriorating effect of R-phase transformation was identified.

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