Mean stress effects on fatigue of NiTi

Tabanli, R. Murat; Simha, N.K.; Berg, Brian T.

doi:10.1016/s0921-5093(99)00340-8

Cited by 74 publications

(46 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, most of the existing literature is focused on the class of Ni-Ti alloys [6][7][8][9]. The authors are cooperating with scientists of different laboratories in a research program investigating the fatigue aspects of a particular Cu-based alloy [10,11].…”

Section: Introductionmentioning

confidence: 99%

Fatigue tests on SMA bars in span control

Casciati

Marzi

2011

Engineering Structures

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Fatigue tests on SMA bars in span control

Casciati

Marzi

2011

Engineering Structures

View full text Add to dashboard Cite

“…On the basis of this observation, we modifi ed the Coffi n-Manson relation 8) . Nickel-titanium alloy is a pseudoelastic material 6,7,13,14) . It deforms with the application of forces and torques and returns to the original shape after the forces and torques are removed (elastic property).…”

Section: Mathematical Modelmentioning

confidence: 99%

“…In other words, its state of stress passes through both loading and unloading phases. During cyclic loading, the positions of loading and unloading paths depend on the number of cycles 13,15) . The average value of maximum stress corresponding to the upper horizontal line (Fig.…”

Section: Mathematical Modelmentioning

confidence: 99%

Predicting in vivo failure of rotary nickel-titanium endodontic instruments under cyclic fatigue

et al. 2012

View full text Add to dashboard Cite

The aim of this study was to examine the lifespan or number of cycles to failure of tapered rotary nickel-titanium (Ni-Ti) endodontic instruments. Simulated root canals with different curvatures were used to determine a relation between canal curvature and instrument lifespan. Using a novel mathematical model for the deformation of pseudoelastic Ni-Ti alloy, it was shown that maximum stress need not necessarily occur at the outer layer. On the basis of this observation, the Coffi n-Manson relation was modifi ed with parameters determined from this experiment. Results showed that the number of cycles to failure was infl uenced by the angle and radius of canal curvature and the size of instrument at the beginning of canal curvature. The resulting quantitative mathematical relation could be used to predict the lifespan of rotary Ni-Ti endodontic instruments under clinical conditions and thereby reduce the incidence of instrument failure in vivo.

show abstract

“…This demand has triggered numerous studies toward understanding the thermal mechanical behaviors of these alloys in the past decade. The mechanisms of martenite detwinning [4] and stress-induced phase transformation, [5,6] the effect of the microstructures such as phase constitutions, [7,8] grain size, [9,10] precipitates and inclusions, [11][12][13] crystal orientations, [13,14] and deformation conditions [7,8,[14][15][16] on the thermal mechanical behavior and fatigue properties have been studied. New technologies such as in situ EBSD, [17] and in situ neutron and synchrotron X-ray diffractions [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] have recently been used to gain insight into the material behavior at the microscopic level.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Intergranular Stresses in a Martensitic and an Austenitic NiTi Wire During Loading–Unloading Tensile Deformation

Cai¹,

Schaffer²,

et al. 2015

Metall Mater Trans A

View full text Add to dashboard Cite

In situ synchrotron X-ray diffraction testing was carried out on a martensitic and an austenitic NiTi wire to study the evolution of internal stresses and the stress-induced martensite (SIM) phase transformation during room temperature tensile deformation. From the point of lattice strain evolution, it is concluded that (1) for the martensitic NiTi wire, detwinning of the [011] B19¢ type II twins and the {010} B19¢ compound twins is responsible for internal strains formed at the early stage of deformation. (2) The measured diffraction moduli of individual martensite families show large elastic anisotropy and strong influences of texture. (3) For the austenitic NiTi wire, internal residual stresses were produced due to transformation-induced plasticity, which is more likely to occur in austenite families that have higher elastic moduli than their associated martensite families. (4) Plastic deformation was observed in the SIM at higher stresses, which largely decreased the lower plateau stresses.

show abstract

Mean stress effects on fatigue of NiTi

Cited by 74 publications

References 2 publications

Fatigue tests on SMA bars in span control

Fatigue tests on SMA bars in span control

Predicting in vivo failure of rotary nickel-titanium endodontic instruments under cyclic fatigue

Evolution of Intergranular Stresses in a Martensitic and an Austenitic NiTi Wire During Loading–Unloading Tensile Deformation

Contact Info

Product

Resources

About