Effect of the Addition of 3% Co in NiTi Alloy on Loading/Unloading Force

Phukaoluan, Aphinan; Dechkunakorn, Surachai; Anuwongnukroh, Niwat; Khantachawana, Anak; Kaewtathip, Pongpan; Kajornchaiyakul, Julathep; Wichai, Wassana

doi:10.1088/1757-899x/265/1/012013

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…In fixed orthodontic treatment, the functionality of archwires is quite essential for generating mechanical forces that are transmitted through brackets for causing movement in the teeth and correcting malocclusion, spacing, and/or crowding; they are also used for retentive purposes such as maintaining the teeth in their current position [8]. In addition, these wires are needed to remain in the mouth for a prolonged period of 18-24 months [9].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the High Cycle Fatigue Behavior of the Orthodontic NiTi Wires: An in Vitro Study

Farzanegan

Shafaee

Norouzi

et al. 2022

Pesqui. Bras. Odontopediatria Clín. Integr.

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Objective: To compare the high-cycle fatigue behavior of four commercially available NiTi orthodontic wires. Material and Methods: Twelve NiTi orthodontic wires, round, 0.016-in, three per brand, were selected and divided into four groups: G1 -Heat-activated NiTi, G2 -Superelastic NiTi, G3 -Therma-Ti, and G4 -CopperNiTi. The atomic absorption spectrometry method was used to determine the chemical composition of investigated NiTi wires. We also performed a fatigue test at three-point bending using a universal testing machine for 1000 cycles in a 35 °C water bath. For the first and thousandth cycle, the average plateau load and the plateau length were determined in the unloading area of the force versus displacement diagram. In addition, we calculated the difference between the average plateau load of the first and thousandth cycle (∆F), as well as the difference between the plateau length of both cases (∆L). Results: According to our results, there were no significant differences between the average plateau load of the first and thousandth cycles of each group (p>0.05) and in the plateau length of the first and thousandth cycles of the groups (p>0.05). Conclusion: There were no significant differences between the groups changing the superelasticity property after high-cycle fatigue.

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Section: Introductionmentioning

confidence: 99%

Comparison of the High Cycle Fatigue Behavior of the Orthodontic NiTi Wires: An in Vitro Study

Farzanegan

Shafaee

Norouzi

et al. 2022

Pesqui. Bras. Odontopediatria Clín. Integr.

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“…Cobalt is an efficient means for the adjustment of these properties. Estimations of the effect of cobalt on the shape memory parameters and mechanical properties of monolithic materials, based on TiNi for medical purposes, were published in the literature [7][8][9][10]. Phukaoluan et al showed that the addition of 3% Co in a TiNi alloy can increase the loading-unloading force of TiNi wire due to the increase in phase fraction austenite.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cobalt on the Deformation Behaviour of a Porous TiNi-Based Alloy Obtained by Sintering

et al. 2021

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This research investigates the effect of cobalt on the deformation behaviour of a porous TiNi-based alloy that was obtained by sintering. Porous TiNi-based alloys with cobalt additives, accounting for 0–2 at. % and with a pitch of 0.5, were obtained. The structural-phase state of the porous material was researched by X-ray structural analysis. The effect of different amounts of Co (used as an alloying additive) on the deformation behaviour was investigated by tensile to fracture. The fractograms of fracture of the experimental samples were analysed using scanning electron microscopy. For the first time, the present research shows a diagram of the deformation of a porous TiNi-based alloy that was obtained by sintering under tensile. The stages of deformation were described according to the physical nature of the processes taking place. The effect of the cobalt-alloying additive on the change in the critical stress of martensitic shear was investigated. It was found that the behaviour of the concentration dependency of stress at concentrations under 1.5 at. % Co was determined by an increase in the stress in the TiNi solid solution. This phenomenon is attributed to the arrangement of Co atoms on the Ti sublattice, as well as an increase in the fraction of the B19′ phase in the matrix. The steep rise of the developed forces on the concentration dependency of the martensitic shear stress at 2 at. % Co is presumably attributed to the precipitation hardening of austenite due to the precipitation of finely dispersed coherent Ti3Ni4 phase following the decrease of fraction of martensite. An analysis of fractograms showed that as more cobalt was added, areas of fracture with traces of martensite plates of the B19′ phase started to prevail. At 2 at. % Co these plates fill almost the entire area of the fracture. The research findings presented in this work are of great importance, since they can be used to achieve the set of physical and mechanical properties required for the development of biocompatible materials for implantology.

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Enhancement in strength and superelastic cyclic durability by addition of Si in Ni–Ti–Cu–Zr alloy

Kim

et al. 2020

Intermetallics

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Effect of the Addition of 3% Co in NiTi Alloy on Loading/Unloading Force

Cited by 4 publications

References 15 publications

Comparison of the High Cycle Fatigue Behavior of the Orthodontic NiTi Wires: An in Vitro Study

Comparison of the High Cycle Fatigue Behavior of the Orthodontic NiTi Wires: An in Vitro Study

The Effect of Cobalt on the Deformation Behaviour of a Porous TiNi-Based Alloy Obtained by Sintering

Enhancement in strength and superelastic cyclic durability by addition of Si in Ni–Ti–Cu–Zr alloy

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